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What California is learning from solar panels built over irrigation canals

303 pointsby 1d agokqed.org
547 comments
1d agoHN ↗

It seems like it would be more effective to simply put all the solar panels in a field, and construct a cheap shade over the entire canal no? The supports in the picture are massive and don't look cheap. Also I would imagine the solar array uses more copper than a similar capacity array just built in a field. You can't daisy chain multiple miles of solar panels together, so you need an extra power line to run alongside the whole thing.

Put the solar panels in a field: The solar array uses less copper. The shade supports don't have to hold up solar panels: Shade supports cost less.

The best reasoning they give is that California has insane permitting requirements, and it takes 1/6 the time to build on developed land compared to undeveloped land.

1h agoHN ↗

I'm being a bit filp, I don't literally mean to do it.

9m agoHN ↗

400+ miles of 20m tunnels. How much cheaper is that going to be?

20h agoHN ↗

According to AI, that pipe would only need to be 43 Feet in diameter, only 43 feet wide. Pretty sure they have that at Home Depot.

3h agoHN ↗

You wouldn't do it that way. You would have several 10 foot diameter pipes (which they already make, and are small enough to fit on a truck). That way when one pipe has a problem you can shut it off an still get most of your flow. A lot more expensive than an open canal though.

19h agoHN ↗

I'm sure it could be done, but it would cost a fortune. My understanding is the canals were built to distribute water to farmers, and conservation/evaporation wasn't really much of a consideration because California had plenty of water back then.

BTW, I used to swim in those same canals around Modesto and Turlock as a kid. So gross.

18h agoHN ↗

And suddenly you can build something else on those pipelines?

19h agoHN ↗

What's the lifetime of a "cheap shade"? And the cost to renew it over the same lifetime? And the cost of paying for other land?

... likely less than the ~$13/W this cost to install, but that included NRE for three different styles of panel mounting. Standardizing would cut costs significantly.

19h agoHN ↗

Yes, I'd like to see the "cheap shade" that could span as far as shown in the pics as well as survive strong gales. It wouldn't be like a cheap shade in your back yard.

8h agoHN ↗

As mentioned in the article, we heavy in Europe a good source of shade that's rather self sustaining and even helps replace the concrete lining of the canals. It's a wonderful technology called trees

19h agoHN ↗

There are solutions like this to most of Californias big intractable problems, and they're not done because some California laws and/or regulations make it impossible.

This is one reason I now live in Nevada, where pretty much everything is legal...

19h agoHN ↗

A lot of things get easier when everyone basically lives in one city, yes.

19h agoHN ↗

The cost of building that steel structure that will hold up against maximum in 100 year wind forces isn't cheap. Large PV panels make very good sails. The trusses look basically the same as you'd see in a large agricultural barn, horse riding arena, etc. Putting the PV panels on empty bare land at a height people can walk around and work with would be considerably less costly.

I would very much like to see a total dollar figure for the example "roof trusses over the canel" structure vs. how many panels it can hold.

It's already true that the ground mounting costs and labor to assemble the ground mount are a huge part of building a large scale PV system.

19h agoHN ↗

Putting the PV panels on empty bare land at a height people can walk around and work with would be considerably less costly.

What empty, bare land?

If its really empty and bare, there is a reason for it and that reason is probably a problem for building and maintaining PV, and otherwise you have to add the loss of the alternative uses of the land to the cost.

19h agoHN ↗

What empty, bare land?

Have you been to Death Valley, my friend? All of Southeastern California is empty, barren land. Death Valley, Mojave Desert, etc.

18h agoHN ↗

Guess how fast the wind blows across the surfaces. There's a reason why these places currently host massive wind turbine farms.

17h agoHN ↗

Have you been to Death Valley, my friend?

Well, no, but I’ve been close and I can imagine some features of the area that might have impacts on cost of construction and ongoing maintenance that are related to why it was empty land even before it was a National Park (and I can think of additional problems with California trying to build solar generation in a national park—different ones under the current federal administration than would be historically normal, but either way it would problematic.)

5h agoHN ↗

If you look at the city of Mojave, Calif. on Google Maps (satellite view) you can see massive solar farms all around it. There is plenty of space for expansion. There is no need to use a national or state park. (To be clear: Mojave Desert is far away from the city of Mojave!)

13h agoHN ↗

The wind and blown sand is something to behold. But large stretches are getting solar panels, yes.

19h agoHN ↗

In the context of California, land that is not suitable for agriculture because it can't be irrigated, even though it's flat and somewhat accessible by road. California has plenty of it, go drive around near Twenty Nine Palms and you'll see it...

18h agoHN ↗

And the moment you start building large structures on it everyone and their dog is going to show up and NIMBY it.

18h agoHN ↗

Spoken like someone who has never been to the mojave. This is the home to the largest wind turbine installation in the country. But again, if the worry is the solar panels acting like sails, probably not a great site given that wind.

36m agoHN ↗

Sorry, the largest wind power installation in the western hemisphere, not just the US, is SunZia in New Mexico (5.3MW).

1h agoHN ↗

Ok, now ask yourself why that area hasn’t been covered with solar panels yet…

18h agoHN ↗

To my eye if you were putting up a few hundred or more of those steel structures, and it didn't require a redesign of the canal retainment around it, it could be built quite economically.

Every extra pylon structure built, especially the first dozen, will be cheaper and easy to produce and install.

18h agoHN ↗

You know where the wind blows really damn hard in California? Virtually any open field you can imagine putting these otherwise. Mojave for example is damn windy. That is why they currently host massive wind installations there.

18h agoHN ↗

I'm well aware of that, thanks. Ground mount PV is still going to be considerably less costly than this. Partly because it's easier to build, partly because it has many competing companies that sell the basic aluminum rail/hot dip galvanized steel mounting pieces, partly because you can use relatively low cost contractors to do work like install its footings and bolt it together.

Having stuff at ground level that can be reached by people on foot or on a 6 foot step ladder also makes doing the electrical work a lot less costly.

15h agoHN ↗

Having stuff at ground level that can be reached by people on foot or on a 6 foot step ladder also makes doing the electrical work a lot less costly.

I mean sure, but compared to say having that technician in a dingy boat, its more costly in the sense you need a dingy boat. But this doesn't seem insurmountable. Maybe you don't even need a dingy boat. Maybe just a long 2x12 would be fine or some other scaffold platform you can just drag around. There's also something to be said about this solar array being where the land is already being used, and some greenfield solar array going in, well, greenfield areas that might be ecologically more sensitive.

14h agoHN ↗

Tell me you've never built a ground or roof mount PV system without coming right out any saying it... Wow. You took a look at the photos in the original URL and think that a person can stand in a small boat and wire up the backside of the panels? I'd love to obtain some of what you're smoking because it must be some incredible stuff.

17h agoHN ↗

The UK has covered some water reservoir with floating PV panels.

The article mentioned trialling several systems for covering California canals, I didn't see "floating" mentioned, although:

  Project Nexus tests not one, but three different solar canal models. 

  ... accordion-like retractable panels are positioned low across the narrow canal, ready to roll up at a moment’s notice. 

might come close.

Floating panels have the issue of having to flex and perhaps bottom out (if water diverts to parallel canal for maintenance) on a dry canal - but there's less need for heavy steel trusses and a lower wind profile.

8h agoHN ↗

It’s not empty or bare - there is a water canal right in the middle of it.

5h agoHN ↗

    > The cost of building that steel structure that will hold up against maximum in 100 year wind forces isn't cheap.

I'm surprised by this comment. (Is this area known for strong winds?) If your comment is true, wouldn't all warehouses using the same type of standard "bents" also be very expensive? I doubt it.

    > Large PV panels make very good sails.

A quick Google search tells me:[1] "Most modern solar panels can withstand winds of up to 140 miles per hour." For all of the things I have read about large commercial solar panel installations, never once did I read anything about the risk of wind tearing off PV panels. If this were really a serious threat, wouldn't we see regularly local news stories about large PV panels "flying" away in big wind storms? And, yet, I never saw one.

[1] https://www.makemyhousegreen.com/green-guides/can-solar-pane...

40m agoHN ↗

I'm surprised by this comment. (Is this area known for strong winds?)

Areas of the central valley are legendary for strong winds. A large stretch of the aqueduct (200km?) runs along the valley's West edge. So does the interstate highway I5.

The I5 has frequent high wind advisories. In the area around Pacheco Pass there are frequently gusting cross winds between 55 and 70km per hour. I use the I5 as my reference here, because I have spent many hours of my life driving it in these conditions.

If your comment is true, wouldn't all warehouses using the same type of standard "bents" also be very expensive?

What makes you think building a warehouse in earthquake country is cheap?

For all of the things I have read about large commercial solar panel installations, never once did I read anything about the risk of wind tearing off PV panels. If this were really a serious threat, wouldn't we see regularly local news stories about large PV panels "flying" away in big wind storms? And, yet, I never saw one.

The statement about solar panels making very good sails obviously true. Everything thin and flat makes a good sail.

PV panels don't go flying away because people spend a lot of money attaching them to the ground. They're expensive systems, and any installer that didn't make sure they were bolted down effectively, would be sued out of business after the first windstorm.

32m agoHN ↗

You can meet code requirements on rocky ground with relatively small concrete block anchoring systems. The cost of the blocks plus the metal pipe structure for a ground mount system is typically 10% or so of the total system install.

If you're on excavatable ground, the cost goes up a little (paradoxically, way more concrete is required to meet code).

There are also companies do this sort of thing with earth anchors/helical ground screws, which are VERY fast to install, but tend to cost more than the concrete. Nice that they can be (re)moved, though.

19h agoHN ↗

My understanding is that "The best reasoning they give" is the entire point. It such a huge issue that it drowns out all of the valid but smaller issues you are pointing out. And, the benefit to the water is just a bonus.

19h agoHN ↗

Exactly, that is hundreds of miles over which no NIMBY holds sway. The state can do what they want.

4h agoHN ↗

High level, I agree with your comment. In the case of this experiment, it was built by the Turlock Irrigation District, which was "financed by issuing public general obligation bonds. The debt was systematically paid back over decades through local property taxes and water delivery fees collected from the farmers." However, there are lots of canals that are directly owned by the state, so they are good candidates also.

19h agoHN ↗

Power lines are made of aluminum and steel.

I seriously doubt that you can chain even 1/4 mile of panels together without destroying things. Thats already puting thousands of volts and hundreds or thousands of amps through the silicon. If you are making it all parallel you still need wiring between panels that can handle that. The cabling doesn't go away, it just moves.

Wouldn't there still be supports in a feild of solar panels? Are you sure that those supports + the supports for the shade material are going to be less material than the supports for this?

Most shade material wears out pretty quickly. Will their replacement result in more expense, more waste, etc than just putting the solar panels?

Shade material is generally pretty heavy, is it really going to need significantly less robust support? Weight aside, how much of the load those supports are rated for is due to the actual weight of the panels, and how much is for forces from things like wind?

19h agoHN ↗

"Thats already puting thousands of volts and hundreds or thousands of amps through the silicon."

In a typical string of solar panels design, you'll get tons of volts but not a lot in amps - current cell maximums top out at ~11A and the connective MC4 wiring can't handle too much more current than that, so what you end up with is like a 1,000V 10A string on one MPPT connection into the inverter.

19h agoHN ↗

A solar panel is 4 feet or so on the long side. Theres 250+ of them in a string 1/4 mile long.... at 48 V/panel, you get to 12KV. even if it's topped out at 10A thats still 120KW... you need a hefty cable to carry that panel to panel. Which is the core of the point I was making.

19h agoHN ↗

Amps determine how hefty a cable needs to be, not volts. Volts mostly determine how thick the insulation needs to be.

14 gauge wire is basically all you need to carry 10A safely for an extended period of time regardless the voltage. It doesn't matter that you are carrying 120KW.

The proof of this is in EV charge cables. Those bad boys can carry up to 350kW. Yet the cables are often thinner than you might expect. How do they do this? It's by using high voltages (around 900V) which cuts back the amps to around 300->400.

Tesla's chargers peak (or used to) around 600V which has required them to have much beefier cables to handle the high current.

18h agoHN ↗

I get that. I'm pretty skeptical that 120 KW going through the last panel doesn't cause damage, and in the "multiple miles chained together" (to quote op) many MW going through the panel at the end of the chain doesn't run into some sort of issue in the real world. Even small percentage losses turn into a lot of heat or other issues at that scale.

If it doesn't why not just make the whole 100 mile stretch of canals discussed a single very long daisy chain of panels, and still address the concern of the OP in terms of extra material for conductors?

16h agoHN ↗

It won't! That's the amazing thing about electricity.

While having 12kV going through panels is not safe for many reasons, having 300V at 10-20A is completely normal.

12kV is impractical because these voltages can jump quite far, and you need a lot of insulation for them to be safe.

13h agoHN ↗

And so ultimately, despite my details being wrong about currents, the notion of stringing miles of panels together is probably not a good basis for rejecting the panels over the canals.

11h agoHN ↗

Just imagine that GP stated wattage, or better yet energy. Nitpicking the details of how electricity is distributed does not refute his point.

1h agoHN ↗

"Theres 250+ of them in a string 1/4 mile long.... at 48 V/panel, you get to 12KV. "

And they're never installed in config chains that high voltage - cell spacing between cells is typically very low and only capable of withstanding ~5kV before internal arcing occurs.

Also, your typical 72-cell solar panel is only 32V.

3h agoHN ↗

Why would you chain a quarter mile of panels?

The obvious answer is a cheap inverter ever few meters - this is typical practice with solar panels - and then a cheap transformer scattered around to get the voltage to whatever the line is. This is the common cheap practice for solar installs everywhere.

Microinverters where there is an inverter on every panel are also common - they are more expensive, but reduce some labor.

Either way the inverter is connected to a network and then get remote monitoring of each section and in turn can plan maintenance as needed.

19h agoHN ↗

Anecdotally speaking, I have heard of a massive California solar farm in an undeveloped area that has serious vandalism problems. Junkies will find ways through the fencing at night, strip copper and other materials from panels, and cause thousands in damages and lost energy just to extract enough scrap for a fix.

Nothing short of a face-to-face security response will deter these criminals, so there it is a challenging cost-benefit balance. At least panels in parking lots and other developed spaces have the benefit of witnesses. I'm sure a 20 foot climb up a steel beam over running water is a decent deterrent as well.

18h agoHN ↗

Anecdotally speaking

First hand experience here - worked with a non-profit that has a tiny solar and battery installation for a light display, and we have had constant theft and vandalism problems with it. It's not even easy to get to - those meth-heads had to work to steal the lead acid batteries and copper wire...

17h agoHN ↗

Several years ago one of the local youth sports complex was limited to daylight use because the copper would get stolen from the light poles. This was a large complex with many light poles. Within a week of them being fixed, they'd come and steal the new copper. I never did follow up to see what they ultimately did to discourage the thieves.

16h agoHN ↗

There are large, large stretches of highway near me that’re all but pitch black at night because people have stolen copper from the light poles. It’s only getting worse.

15h agoHN ↗

Is this in California? I don’t think I’ve ever seen this in Texas.

4h agoHN ↗

Kind of a different point, but I never saw it in my neck of the woods either because there was no lighting in the first place.

15h agoHN ↗

In a just society the penalties for that behavior would be commiserate with the societal costs. Even if the single act is relatively low cost, the societal-wide implication means no one can reasonably do this at a small scale without losing their investment. Therefore the penalties should be harsh, widely publicized, and extreme

15h agoHN ↗

This I believe is part of why forgery is dealt with so harshly, copying a few thousand bucks isn’t a big deal but destroying the integrity of hard currency is.

13h agoHN ↗

I always thought the same logic should be applied to corruption by any kind of official. No matter if politician, judge or police officer - their crimes should be punished 10- or even 100-fold because the real damaged is undermining the entire system.

10h agoHN ↗

The system being protected in nations today is the pay-for-play,

not “do the right thing for society”.

14h agoHN ↗

Such a society would pay a whole lot more attention to white-collar financial and environmental crimes than to anything all the motivated junkies in the country could wreak.

5h agoHN ↗

Then you stack the courts with bent judges. I mean, what's the point of taking all that money if it doesn't get you what you want?

15h agoHN ↗

Man, we don’t have tools to deal with these clowns. I had the gas tank in my truck drilled. I doubt they got even 5 gallons worth of gas, worth about $25 at the time. The fix cost me $2500. I found out from the shop that there had been a string of these going around town. After some digging, I came up with an order of magnitude estimate of somewhere around 50 such instances. So, what was undoubtedly just a couple of people at the most had done probably over $100k in damages to get maybe $1200 worth of spoils. Even if caught, unless they confessed to more, they’d probably only ever risk getting linked to a single one of these crimes and face a tiny fraction of the consequences they deserved. Such a drain on society.

13h agoHN ↗

This kind of thing is why Dirty Harry style crime-punishment-porn exists.

13h agoHN ↗

Maybe I'm missing context from your locality, but you think the meth heads tried to sell gasoline on the sidewalk, and not that the shadiest shop in town paid some people to drum up business?

13h agoHN ↗

I've met enough to know that selling sidewalk gas is totally an option in their mind.

12h agoHN ↗

You'd be amazed at how many fences are out there and what they will accept

10h agoHN ↗

There used to be a house opposite me in Chicago that was a big crack/meth dealer. They would accept literally anything as payment. People would turn up there all day long with storage totes filled with random crap. The crap would be picked through, narcotics exchanged and then the rest thrown out the back. It was an excellent source for storage totes, though I sometimes had to retrieve my trash can from there as they would steal half a dozen of them every week to put all their leftover crap into.

1h agoHN ↗

the same thing happens in my area where there's a lot of car/RV homeless. If you take a look and think about it, you'll come to the conclusion that they're definitely not driving a decrepit 1980s winnebago to a gas station and paying $5/gal for gas to run their heat and generators.

13h agoHN ↗

Man, we don’t have tools to deal with these clowns.

We do. Arrest and imprison the fences and scrappers that pay cash to buy copper off the tweakers.

The problem will solve itself in a few weeks. Hang the fences, and the thieves will starve. It's both way easier to go after them, and they have something to lose if they don't follow the law.

12h agoHN ↗

Arrest and imprison the fences and scrappers that pay cash to buy copper off the tweakers.

How do you expect the scrappers to know if something was stolen and not just some old wires you've been stuffing in a bin until you accumulate enough to justify a trip to the scrap yard?

How do you even expect to catch the scrappers who knowingly pay for stolen copper if you don't have a way to know that what they throw into the smelter was stolen?

Meanwhile if the idiots keep stealing copper from the same place over and over, is it really that hard to maybe put up some cameras or set up a sting?

12h agoHN ↗

California’s tried cracking down on catalytic converter theft with significant measures. (I think a legitimate scrapyard would have to do a bunch of paperwork to buy a cat.) Anyone know the outcomes?

4h agoHN ↗

My state used a few undercover cops to start fencing (not actually) stolen cats to scrapyards, identified scrapyards that would knowingly take stolen property, and then turned a few of the employees / owners of such places into CIs. Eventually a large nationwide ring was found.

8h agoHN ↗

No way. Was this is Canada? Specifically in the upper interior of BC, during ski season? Either we know each other, or drilling holes in gasoline tanks is way more widespread. I have never heard of another instance of this happening, ever.

14h agoHN ↗

Happened right here too: thieves opened up man hole covers in city parks and took the wires. The city now has large boulders right over those man hole covers...

11h agoHN ↗

why not switch to aluminum? I believe most building codes allow aluminum conductors.

3h agoHN ↗

Aluminum has a lot of weird strict rules. It is cheaper, but the labor is more expensive. You can slap copper together quick and it will be safe and work perfectly fine for decades - there is no real world advantage to doing any better. For Al you need to take a lot more care to follow the rules or you have a fire in a few years.

Al is typically used for the large wires - the cost of the wires makes it worth the extra labor. For your typical house though the cost of labor is more than the wires, so Al is more expensive than copper.

15h agoHN ↗

Why can't we aim these meth supervillians at the surveillance cameras then?

14h agoHN ↗

they're hitting those too to be fair. In South America its a big problem in communities that are really poor. The components of even CCTV cameras are so valuable that surveillance cameras get taken down almost immediately

12h agoHN ↗

I’ve heard in some places it’s hard to keep light bulbs in stairwells.

7h agoHN ↗

Bulbs get taken from stairwells, because someone needed them. Sand, gravel, slabs, pipes disappear from construction storage and when you look around a neighbour's yard looks a lil snazzier than it did the week before.

It's a mix between culture and poverty. In high trust society much fewer people would consider taking that material fair.

17h agoHN ↗

I’m willing to bet if we gave them their fix they wouldn’t steal a thing. But because their fix is illegal they have to steal to get their fix.

Seems to me like the root cause is the illegality of the drugs. I hope you never have to deal with substance abuse problems yourself. You won’t like being on the dehumanizing end of the stick that you’re presently poking with.

17h agoHN ↗

If you're going to give junkies their fix, are you going to buy my alcohol too? What about my gambling debts? What about my escort bill for my sex addiction? Shy are you differentiating addiction to drugs?

17h agoHN ↗

Someone with heavy, habitual alcohol use can still get drunk on $20 of alcohol. Someone with a heavy opiate habit may spend hundreds of dollars a day on drugs just to maintain. A habituated opiate user could also get through the day with $20 worth of drugs if we allowed opiates to be produced and sold like alcohol, but we don't. So the unemployed junkie needs to beg or steal a lot more than the unemployed alcoholic to get their fix. That's why the parent comment highlighted "illegality of the drugs" as the cause.

16h agoHN ↗

If you think an alcoholic stops drinking when they get drunk, then it sounds to me like you don't really understand alcoholism

15h agoHN ↗

I think you missed the posters point. I just checked prices on a store nearby and for the cheap Vodka you can buy a handle which is ~40 drinks for $12. So basically no matter how extreme for $20 you can buy more alcohol than pretty much any human could consume in a day.

16h agoHN ↗

Junkies and meth-heads are a different kind of animal from your average drunk, and the reality of the proposal that you responded to is a simple economic analysis of investing in keeping them placated or paying for the damage they cause. It's far cheaper to prevent rather than react and repair.

If we ended the War on Drugs we would be doing exactly this thing and saving billions of dollars doing it.

13h agoHN ↗

I don't have anything to add, other than my appreciation for this comment. Glad I'm not the only one here that gets it.

12h agoHN ↗

Ending the war on drugs doesn't mean making all drugs legal. It means removing the stigma and jail time for people who use drugs.

Some drugs are genuinely dangerous. Many are addictive and will damage the quality of one's life, even if buying and using the drug isn't illegal. Normalizing addiction to drugs as a regular, normal, accepted part of everyday life is not the answer.

40m agoHN ↗

I'm advocating for all drugs to be legal -- regulated and taxed.

Keeping them illegal does not "protect" anyone and just creates more crime, death, and misery. You've swallowed the propaganda -- it was never about protecting people, it was designed for oppression and it's wildly successful at that.

Take a look at any video of police busting people for drugs: does it look like they're trying to help those poor innocent victims or are they gleefully enjoying their ability to completely fuck with those people in the name of "protecting" them?

The fact that drugs are still such a problem despite countless billions of dollars shows that it's never going to work in the way that they promise.

Drug addiction is a health issue, not a crime. My brother died of a heroin overdose and the law did not help him and the fact that the only resources public money went to were jails and prisons vs clinics shows where the priorities lie.

Feel free to read up on the truth of this matter: https://www.brennancenter.org/our-work/analysis-opinion/race...

13h agoHN ↗

No, you misunderstand, which means I didn't communicate it well: The problem is that the drugs are illegal. I would make them legal so they could be purchased from a pharmacy. The problem with junkies stealing to get their fix is that they're already criminals for the addiction and already people without support in society. So straight up stealing copper from wherever isn't really a big deal. You're already a criminal. You're already halfway down that slippery slope.

But there was a world in which junkies existed when the junk wasn't criminal. People had serious addictions, but kept normal lives, because their addiction wasn't criminal. I'm not trying to solve addiction. I'm trying to end the criminality for substance abuse.

And to answer, no, buy your own booze. Cover your own debts, gambling or otherwise. Sex addiction is made up bullshit. I don't need to differentiate because I am not trying to solve that problem.

9h agoHN ↗

I suppose you'd agree that some drugs will actually hamper one's ability to function as a productive member of society, whether or not it is illegal; for example, heroin. So if heroin was legal and you could buy it at the pharmacy, and you become addicted and you lose your job and alienate your friends and family, why wouldn't you also end up stealing copper? Maybe heroin being illegal would have made that trajectory one step shorter, but I don't see the story changing fundamentally.

Taking a step back, why doesn't society have a legitimate interest in making sure that people aren't able to take that first hit?

8h agoHN ↗

Taking a step back, why doesn't society have a legitimate interest in making sure that people aren't able to take that first hit?

This can be done by going after suppliers.

There's non-trivial elements to this, otherwise we (I'm not American or in America, but many of the problems are broader) would have already done it.

Off the top of my head (and it will go much deeper): if all vendors are punished then the price remains high ("the iron law of prohibition") -> so you need the government to supply it to avoid dealers getting dollar signs in their eyes at the potential income -> the government must not promote it as part of this -> I'd say "medical prescriptions", but that's from a bias to my experience growing up in the UK where we don't have all the "talk to your doctor about ${pharmaceutical_brand}" ads I hear about in the USA -> would the USA even be able to pass laws preventing this, or is that a 1st Amendment problem?

5h agoHN ↗

Fundamentally I disagree. Specifically about heroin, because that is the junk I am referring to specifically. It does not follow that legal heroin leads to job loss, alienation, etc. Because those are social penalties applied by pious douchebags who wish to punish the addicted.

Perhaps give the book “Chasing the Scream” a read. It is eye opening and respectfully, you seem to need that.

We do have a legitimate interest in making sure people don’t ever take that hit. BUT .. in the USA punishments take precedent over everything. Because we’re cunts from what I can tell.

2h agoHN ↗

It does not follow that legal heroin leads to job loss, alienation, etc. Because those are social penalties applied by pious douchebags who wish to punish the addicted.

I follow what you're saying, that the downsides of drug addiction outside of the user's own body is imposed by the people around them. I suppose that's almost definitionally true. I and many people do in fact find it unpleasant to be around people who are high out of their minds. I do not wish to associate with such people while they're in that state. I do not think that society would be better off with more of them, so I would prefer that society actively disincentivize such behavior. And you could certainly make the argument that this is the same thing as wanting punishment.

But if you're making the argument that being high on drugs might lead a user to job loss organically, I find that hard to believe. What if I didn't even know what heroin was, and saw that an employee was nodding off on the job? Wouldn't I be inclined to fire him?

13h agoHN ↗

Or you could give them an option of treatment instead of jail.

12h agoHN ↗

No differentiation here, alcohol is widely available from legal sources and very affordable compared to illegal drugs.

I come from a country with social healthcare, and here we also heavily subsidize drugs for people who need them because of their own lifestyle choices, e.g. diabetes medicine due to obesity. Why do people who have become addicted to psychoactive drugs not deserve the same compassion?

12h agoHN ↗

Obesity is a bit more complicated than "lifestyle choice"; I don't think it's worth engaging with your question without you understanding that.

12h agoHN ↗

So is drug addiction, and that's my point.

12h agoHN ↗

The root cause is all the people addicted to drugs. We are never going to entirely stamp out addiction, but certainly there are structural things we can do with our society to make it less common, and make it easier for people to get out of that situation.

I don't think dangerous, addictive drugs should be legalized, or available to buy at pharmacies. People who traffic in these sorts of drugs should be jailed.

But possession and use should be decriminalized. People shouldn't be considered criminals because they're addicted to a drug. We should help them, not stigmatize them or throw them in jail.

Ultimately, a healthy society that actually takes care of the people who live in it will have fewer people getting into addictive drugs in the first place. That's a huge lift, though, unfortunately: fixing income and wealth inequality, food insecurity, housing insecurity, etc. is not trivial, and our political leaders (especially those on the right) generally do not want to fix society in this way.

10h agoHN ↗

fixing income and wealth inequality, food insecurity, housing insecurity, etc. is not trivial, and our political leaders (especially those on the right) generally do not want to fix society in this way

On food insecurity: the five states that are the least food-insecure are a swing state, two solid red states, and two solid blue states[0].

On housing insecurity: the states with the most affordable homes (median house price to median income ratio, or share of income spent on housing) are for the most part solid red states[1]. I would wager this is largely due to stronger private property rights in red states that make it easier for supply to rise to meet demand and establish a better-functioning rental market[2].

Let's not make the mistake of judging politicians and government programs by their stated intent and not their factual outcomes. Whether someone "wants to" fix society in one way or another is very, very far removed from whether it actually gets fixed under their leadership. Plenty of times in history, the problem actually got worse!

On income and wealth inequality: unfortunately, these things cannot be fixed except by fixing the fact that different people have different abilities, talents, preferences, and tastes, and some of those differences include the ability to make money and build wealth. Nobody would look at me and think I have an equal chance of making it in the NBA as, say, the guys in this picture[3], but for some reason we're supposed to believe that when it comes to the skills of moneymaking and wealth-building, anyone is about as good as anyone else.

[0]: https://www.americashealthrankings.org/explore/measures/food...

[1]: https://www.affordabilityindex.org/rankings/states/, https://www.businessinsider.com/every-state-ranked-by-housin...

[2]: In parts of California, tenancy laws are so insane that it could take a landlord over a year and tens of thousands of dollars in legal fees to evict a nonpaying tenant. There's a whole cottage industry of landlords paying those same nonpaying tenants good money to just leave quietly. If you had property to rent, how much extra money would you charge to compensate for this risk?

[3]: https://en.wikipedia.org/wiki/NBA_draft#/media/File:NBA_Draf...

9h agoHN ↗

Red v. Blue is not the issue here. Neither of those parties is doing much to combat inequality. You should be comparing the USA to countries that actually try (or have historically tried) to combat inequality and social precarity, like Switzerland, or the Scandinavian countries.

9h agoHN ↗

People shouldn't be considered criminals because they're addicted to a drug. We should help them, not stigmatize them or throw them in jail.

I agree with you, but it's worth spelling out exactly why. Philosophically, prison has one of three purposes: protecting society, rehabilitation, or punishment.

If the sentence for use is anything less than spending the rest of your life in jail, then society isn't really protected from addicts; the recidivist rate is too high. Get out, steal again for the next high, rinse and repeat through the revolving door.

Prison is not an environment capable of rehabilitating addicts. Leaving aside drug smuggling into prisons, getting people past the withdrawal period is the "easy" part of rehab, the real work is in therapy, developing better relationship models, better boundaries, better strategies for the triggers that drove people to look for a high. It's very, very difficult to facilitate that in prison.

Finally, it's debatable whether prison is actually punishment for addicts. If they keep access to drugs through the people who smuggle them into prisons, and the prison pays for meals and a roof that were often lacking for the addict on the street, then, is it really a punishment?

8h agoHN ↗

Prison is not an environment capable of rehabilitating addicts.

IMO, prison makes it worse. Once an addict gets out, it is much harder to go back into regular society. Getting a job, etc., after prison is harder which leads to despair and back to drugs.

16h agoHN ↗

I would love to see more project specs call for aluminum cable. For a given ampacity, it’s lighter, cheaper and more flexible than copper.

The major downsides are that the exposed wire is much less corrosion resistant underground (which is irrelevant) and that you need appropriate lugs. But standard lugs can easily be purchased in aluminum-compatible variants at no additional cost.

10h agoHN ↗

There are downsides though, alu wiring breaks over time when exposed to any kind of stress and the connections loosen and have to be re-checked periodically.

4h agoHN ↗

The 1960s called; they want their trailer fires back.

2h agoHN ↗

Not really. The 1960s used small-gauge aluminum wire with inappropriate alloys and inappropriate connectors. The modern stuff doesn’t have the same problems.

2h agoHN ↗

Aluminum wire is completely safe these days. Wiring devices and breakers have accepted both Cu/Al wire for the last 50 years.

There was an issue with aluminum wire and terminations, the wiring devices and breakers used for copper only wire didn’t work with aluminum (wrong coefficient of expansion of the metal where the terminations were made) and caused arcing and fires. Once the termination points were made out of an alloy that worked with both Cu/Al, it’s been safe to use.

1h agoHN ↗

Wiring devices and breakers have accepted both Cu/Al wire for the last 50 years.

I agree with your general point, but be a bit careful here.

Wiring devices and breakers have accepted both Cu/Al wire for the last 50 years.

It’s true that, for a little over 50 years, the UL has regulated what devices may “accept” Al wire. But devices have had markings suggesting use of Al wire for longer than that, and it was quite unwise:

https://inspectapedia.com/aluminum/Aluminum_Wiring_Repair_CO...

Don’t get caught up in all the discussion of repair devices — AIUI this article is mostly about “repair” of old pre-8000-series Al wire. You can’t buy that stuff any more. As far as I know, modern Al listed building wire is only sold in 8 AWG and up, and this stuff doesn’t need “repair”: it’s perfectly fine in any appropriately listed connector.

15h agoHN ↗

Nothing short of a face-to-face security response will deter these criminals

Is this one of those, "US only First World country that has this sort of problem" problems?

I can only imagine why?

15h agoHN ↗

It’s only US states that don’t arrest people for stealing that have this issue

12h agoHN ↗

Extra data point - Oklahoma is top five in the country for incarceration rate, too.

14h agoHN ↗

No, this is becoming widespread. The Brazilfication of the first world has largerly accelerated in the last few years.

15h agoHN ↗

You violently punish a few of the thieves and problem solved. Why have other countries solved this problem yet america pretends there isn't a gigantic Solve Problem button that is yet to be pressed? Just cane thieves! Imagine how beautiful our country could be.

15h agoHN ↗

These thieves are probably drug addicts and have mental health problems. The “violent punishment” (I think you mean capital punishment) is not going to be a deterrent for them, unlike for normal people who can still think with normal risk-reward calculus.

14h agoHN ↗

Ah man, I guess we can’t do anything then.

7h agoHN ↗

yeah, except throw a tantrum and the towel in

13h agoHN ↗

You can violently punish the buyers instead. These 'businessmen' can do the risk-reward calculus of being shut down. Use civil forfeiture and the varied and interesting arsenal of tools available to government.

9h agoHN ↗

Punishment isn't just about deterrent. An equal and perhaps more important part of it is incapacitation; the criminal, while incarcerated, cannot inflict more harm upon the public.

14h agoHN ↗

America locks up more people per capita than basically any country on earth, so your theory that this is easily prevented by harsh penalties doesn’t make sense.

12h agoHN ↗

Or, you view them as human beings who are desperate and try to help them instead, and probably save money in the process? People who find themselves addicted to opioids or other drugs would not have to steal copper in the first place if they had a safe and affordable/free supply of the drugs they crave.

11h agoHN ↗

if they had a safe and affordable/free supply of the drugs they crave

What would this incredible generosity on the part of the taxpayer achieve? I find it difficult to model your chain of reasoning. Taxpayer-funded benefit programs generally at least purport to have some kind of positive social outcome. What is the positive social outcome of giving drug addicts more drugs? Are we trying to feed a utility monster, where someone's desperation is justification for their actions?

probably save money in the process

That the criminal justice system in the US is slow and expensive is a shame, but it's not written in some divine stone that it has to be that way. It's largely just downstream of the Warren court.

10h agoHN ↗

This is a good question. Off the top of my head:

* Less crime because people who are addicted to drugs do not have to raise instant money for their next fix,

* Getting open, visible drug use off the streets and into a controlled supervised setting (this is not strictly part of safe supply though, but an orthogonal related service),

* Making drug use safer for the users by ensuring quality and consistent strength. Fentanyl, orphines and nitazenes are killing lots of people, and they exist on the market not because of demand from the users but because they are easier and cheaper to manufacture and smuggle than heroin.

* Making it easier to help the drug user by removing the burden and stress of obtaining the drugs. This is often an endless cycle of stress which leaves no room for getting help.

* Making it possible for drug users to be functional members of society. Not all people who are addicted to drugs need to stop, for some the safer choice is to accept that they are dependent and work around it. Taking opioids to prevent withdrawal is not incompatible with holding a job and contributing to society, committing crimes to get money for the next fix is. For many people who are addicted to opioids, abstinence programs are not the best option because the rate of falling back to using is very high, and once that happens the risk of fatal overdose is also very high due to decreased tolerance. I won't quote concrete numbers because I cannot remember them right now, but last I heard the rate of failure in abstinence programs was well above 70%.

* By supplying the drugs from sources that have no financial incentive in keeping the drug users on the drugs, you can ensure that users are exposed to all public offers to get help with their addiction or any underlying socioeconomic factors that are probably contributing to why they have become addicted in the first place.

Most criminologists will tell you that punishment is a very poor method of reducing the crime rate. I believe that to be true, and I think that a much better way is to address the underlying desperation and inequality that drives people towards crime. It doesn't mean that we should stop at the safe supply, because that would indeed be the cynical approach, we of course also have to help people overcome all the problems that are probably keeping them in their drug addiction, such as mental health issues and homelessness.

9h agoHN ↗

Most criminologists will tell you that punishment is a very poor method of reducing the crime rate

Again, this is not anything written in stone. For example, consensus in criminology is that the certainty of punishment is a strong deterrent even when the severity of punishment is not, so the detail of the punishment matters.

And because criminality follows such a strong power law distribution, where a single-digit percent of people are responsible for over half of the crime, it is trivially easy to see that by permanently incapacitating that single-digit percent, you can actually lower the crime rate a lot. El Salvador's homicide rate dropped to 1/100th in ten years by doing precisely this.

To the degree that criminologists say that "punishment is a very poor method of reducing the crime rate", what they really mean is that in the context of today's liberal western democracy, there isn't punishment that will adequately prevent an offender from reoffending while remaining palatable to discuss in polite company. Popular opinion does appear to be shifting on this as we speak.

the underlying desperation and inequality that drives people towards crime

From what I've seen, smart, empathetic people such as yourself are actually really, really bad at modeling the minds and motivations of petty criminals and others in the bottom of the distribution of cognitive capacity who engage in antisocial behavior. It seems to be such an enduring blind spot for many people on the opposite end.

The vast majority of people who commit crime are not Jean Valjean or Aladdin. They smash a windshield that costs $800 to replace for fifty cents in loose change, they assault people to look tough to a girl, they vandalize just for fun. They only steal from stores things they can fence for money, not bread and milk and diapers. Sometimes they'll put in surprising amounts of effort into committing crime; effort that could really have gone into a productive endeavor. There's precious little desperation involved. It's mostly just what feels good to them in the moment.

The vast majority don't need "help", and in fact no one has figured out a way to help these people out of doing what they do. At best you can provide what I would euphemistically describe as palliative care, at great taxpayer expense, to people who would go back to doing what they were doing the moment that help stops.

One caveat: your username suggests that you might be from a homogeneous population with smaller tails on both ends of the distribution, so it's likely that your experience is different than mine, and that you encounter more Jean Valjeans and Aladdins than is the norm around the world. But I would caution that if you can't envision a person who does bad things not out of any articulable reason but just because, as opposed to "like you or I but under worse circumstances", then that is a failure of your imagination.

9h agoHN ↗

But shouldn't that be coupled with mandatory de-addiction program participation? Otherwise, how does the problem end?

8h agoHN ↗

We have to address the root causes of drug use and addiction and ultimately accept that current addicts may stay that way, but over time we have fewer people becoming addicts.

9h agoHN ↗

You'd think reducing crime and saving money in the process would be enough incentive, but it turns out that can be a hard sell on a public that's been trained to relish in seeing violence applied to people presented as bad. I've found that there are people so keenly keyed to said relish that they'll just dead refuse to believe that supportive approaches to drug addiction can be cheaper than coercive approaches with better results to boot, and that's kind of tragic honestly.

12h agoHN ↗

Is there any country where this works? AFAIK the safest countries have consistent but not draconical enforcement. The US has pretty harsh enforcement for a western country but it's very inconsistent and not timely enforced.

10h agoHN ↗

Studies show that the severity of the expected punishment has a relatively small impact on crime (and in some cases, more severe punishments can lead to more severe crimes). The probability of getting caught has a much bigger impact.

8h agoHN ↗

Yes, yes quarter them publicly ina square. Make executions great again - that solved the societal issues back in the day.

And dont think about any kind of social support net and caring for people that would be girly and a socialism. Can't have that.

7h agoHN ↗

The US has one of the highest incarceration rates in the world, so maybe that is not the solution? Sounds easy and direct, but it does not seem to work.

7h agoHN ↗

… Ah, yes, why not emulate peaceful crime-free utopias like, er, Iran and Somalia. The only developed country which does this is Singapore, and these days it doesn’t do it much; about 1000 cases of judicial corporal punishment per year.

The US has the highest large-country rate of incarceration in the world (besides likely North Korea, for which reliable data is not available); not sure what makes you think “more punishment” would be the way to go tbh.

15h agoHN ↗

We can't have nice things until we migrate away from desperation-based economics.

8h agoHN ↗

That does still leave many things like malice (or ignorance that's as good as), organized crime (including political), and possibly neighbours that still have desperation. Lots of things are in the way of having nice things. But nice things are also a spectrum.

3h agoHN ↗

Yeah, there are other root causes. I'm just saying that we should focus on those. Much of this conversation is focused on enforcement. Getting enforcement right is like having the right sized bucket for bailing out your sinking boat: some answers are better than others, but none change the fact that the boat wasn't seaworthy to begin with.

Although to nitpick your examples... Can you really imagine a malice fueled crime that has to do with stealing copper from infrastructure? If you're angry but not desperate for money, there are more satisfying ways to express it.

And organized crime... That's for stealing Venezuelan oil tankers. If you're involved with organized crime and you're stealing copper from infrastructure, maybe you need to find a more ambitious boss because any junkie can do that. You don't even need to be organized about it.

I think the panels are safe if there's enough of a safety net that nobody's desperate

15h agoHN ↗

A few years ago, some foreigners entered a subway depot in South Korea, drew graffiti, and left the country before they were caught.

South Korea put a notice on them on Interpol. At least one was arrested (at an airport in Romania), though I couldn't find any follow-up article on what happened to him. I hope he got to tour the inside of a South Korean jail.

A society should be willing to put resources to protect is public infrastructure. In the long run, it will also be cheaper than fixing the same thing a hundred times, everyone enjoying second-grade service, or both.

13h agoHN ↗

The issue is that the US perceives poverty as personal issue rather than public issue. If my neighbor has no housing their likelihood of becoming addicted is way higher than if we simply gave them a house to live in, and far cheaper than constantly policing them.

4h agoHN ↗

I think is a very unfair allegation to make against homeless people. Most are not drug addicts.

Drug addicts, however, have a hard time holding on to a house, apartment, etc and will often decide to exchange a stable living situation for another drug fix.

Giving houses to drug addicts means: - a non drug addict doesn’t get to get that house - the drug addict now has a house to use drugs in, not take care of, and generally destroy

The answer is for drug addicts to be placed in a rehab program until they aren’t an addict anymore.

13h agoHN ↗

The issue in the US is that punishment is comparatively harsh but relatively few criminals are punished and punishment is usually quite delayed. Studies show that timely, consistent punishment is much more effective.

13h agoHN ↗

The U.S. locks up people at 5x the rate of South Korea. Whatever the difference is, it’s not because the U.S. is unwilling to punish people.

The difference is in consistency in enforcement and general background crime rate.

If you have a nearly guaranteed chance of getting caught doing something, the punishment almost doesn't matter. If every single time you went over the speed limit you got a $500 fine 100% guaranteed, there would be effectively zero speeders ever. If you have a 1 in a million chance of getting caught but the punishment is 10 years in prison - there will still be plenty of speeders all over the place.

Humans do not do well with estimating risk on low probability events. We are all just big children in the end. Consistency in consequences are what actually matters, not overly harsh punishment.

12h agoHN ↗

Yes, this is why “death penalty for everything“ wouldn’t suddenly eliminate crime.

9h agoHN ↗

No, but it would gradually lower it. However, the rate of violent felonies to misdemeanors would rise rapidly (cf. Chen Sheng and Wu Guang uprising).

8h agoHN ↗

Depends how effective the enforcement is; but anyone who wants to repeat Pol Pot is someone to run from quickly, if they get anywhere near a position of power.

1h agoHN ↗

He killed people for such crimes as wearing glasses, knowing French, and being able to read.

12h agoHN ↗

What would that look like - increasing the number of US police officers by 2x etc. to ensure they catch every person who commits any crime? Reducing the rights of those accused of a crime to ensure they don't skate?

11h agoHN ↗

I think you have to start with increase policing so that there’s a high chance of being caught. In the US, 2x is nowhere near enough given the size and number of street lights available to vandalize.

We have literal high tech surveillance equipment being vandalized at scale with not many people getting caught. Referring to the Deflock movement

10h agoHN ↗

Neither. The US has a problem with incompetency in policing. Part of that stems from the prevalence of far-right ideology that is common among US police but not common in peer developed countries. Far-right officers are ideologically disposed to not being effective, either because they prefer punishment to procedure, or because it's in their interest to keep crime high.

Fix those two issues and the same number of officers will catch many more criminals.

10h agoHN ↗

Or maybe what constitutes a crime should be rethought (e.g. there is no reason at all to keep the "war on drugs" going, it clearly has failed), and instead focus on prevention?

That way you'd get a massive reduction in crime without having to invest into more police officers.

8h agoHN ↗

My thoughts:

- Harsh prosecution and punishment of corruption and white collar crimes, combined with publicity around these efforts. How can you expect someone to respect the law if they routinely see those in power over them (the police, their employer, their senator, etc.) get away with criminal activity?

- After setting up safeguards to enforce privacy protections, vastly increase the use of camera-based traffic enforcement. For example, create separate traffic enforcement agencies so that police don't have access to camera data. Use trajectcontroles (Dutch word for a system where multiple cameras on highway entrances/exits track your license plate and ensure your average speed was below the limit), cameras that detect texting while driving (pioneered by the UK), microphone-linked cameras in residential areas that detect modified exhausts (pioneered by Taiwan), and HOV-lane enforcement cameras. Keep traffic officers focused on ensuring that everyone has a valid/viewable license plate. The result should be a system where committing small traffic violations is not normalized.

- Reduce the punishments for most crimes. Large punishments are cruel, expensive to dole out, and less effective than consistent enforcement + small punishments.

- Set high expectations for police officers and create a culture of accountability. Fire those who are playing on their phones and arrest those who are committing crimes. You probably need independent oversight agencies to be able to do this.

- Make police highly visible - bright yellow high-vis vests and cars (pioneered by Antwerp) ensure that police are there to deter crime rather than hide and catch it.

- Provide actual public services so that people have a chance to succeed. A variety of unpleasant behaviors (e.g. public defecation, being disruptive/yelling in public, public drug use/intoxication) are things that no one wants to do - they are driven by a lack of, for example, homeless services, mental health services, and drug treatment services.

- Reprioritize enforcement (looking at you, drug task forces). Expand the legal definition of entrapment and stop doing so many B.S. sting operations.

8h agoHN ↗

It would look like an AI-driven surveillance state, combined with near-immediate consequences which are individually slap-on-the-wrist penalties and only become severe if they are repeated.

AI, not human, because the actual incidence rate for a lot of crimes is much much higher than most people realise, including for extremely severe cases:

• Statistically speaking I think it's something like most Americans commit three felonies per day*, but that's probably mostly drugs which IMO should be liberalised anyway.

• For an example of extremely serious crimes, and again statistically speaking, your first day in highschool, your first class on that day, you likely met someone who had been sexually assaulted by a family member.

Increasing a human police force to the scale needed to catch all crimes is theoretically possible (the Stasi basically operated at this scale even if they only thing they cared about was sedition) but is a terrible idea.

If all crimes keep their current penalties, a fully automated surveillance state bankrupts everyone almost immediately.

Note: I'm not suggesting this is a good future. I don't think it's a stable equilibrium, I think there's too high a risk of a leadership using such a surveillance capability to hold power, and they may even not care too much about non-state crimes once they do seize power, so this could easily become Stasi 2.0 or worse.

* Or the mean felonies per day is 3, which is a very different claim. I've not read the book: https://en.wikipedia.org/wiki/Harvey_Silverglate

7h agoHN ↗

Yeah, as a human race, we've clearly reached the technological era where deep, ubiquitous surveillance is both technologically and economically feasible. For a few years now, I've been thinking we need a constitutional amendment to restrict the mechanisms, deployment, and use of mass automated surveillance.

Human beings don't empathize well with situations nor people they never have to personally face. That's a well-lit path to fascism. We're one step closer to 1984.

5h agoHN ↗

An acquaintance of mine experienced severe domestic violence (trying to choke him to death with an accomplice in front of his children + another witness).

She got arrested for that since the law requires it for domestic violence and turned out she had skipped bail for a grand theft auto conviction. She served 3 days then got released because the county jail was full.

Her conviction for domestic violence ended up being 6 days in another county jail.

She has since been running around committing more crimes, including stealing her children’s IDs, birth certificates, social security cards, and using them commit welfare benefits fraud. Police took a report and won’t go pick her up since it’s a nonviolent crime despite her violent history.

I’m not sure what’s needed (more police to say sorry, we can’t help you isn’t what’s needed), but having an antisocial person selling her children’s food benefits is not a good thing. Before anyone says she needs “services”, she already gets a guaranteed disability income, free housing, and her own food and free medical benefits including addiction rehab services.

2h agoHN ↗

Wow. Your single anecdote showing humans have created an imperfect system, and/or sometimes some people just don't want to live in society with others no matter what, once again has really shown me that we should only ever go after the symptoms instead of working on the real problems. More police! More jail time for everyone! Death penalty for minor offenses! More jails need to be built! Surely that will fix it this time!

That was sarcastic in case you couldn't tell.

2h agoHN ↗

See Mark Kleiman's - When Brute Force Fails. The book mentions the Hawaiian HOPE project. The dealt with parolees by punishing violations with immediate mild punishment (i.e. you're back in jail over this weekend)instead of allowing violations to accumulate over time and then coming down on the person like a ton of bricks ( on your 10th positive urine test you go back to jail for a month).

11h agoHN ↗

Your point only stands if you assume that Americans and Koreans commit crime at the same rate, which is eminently false. The high rate of incarceration in the US is directly downstream of higher criminality compared to other advanced economies.

In fact, were Americans not constitutionally averse to stronger government, even more people would be locked up. People do stuff in America day after day that would not fly in Korea.

10h agoHN ↗

US has massively lomger sentences. It does not have that much higher ceime rates, but it loves to lock people.

10h agoHN ↗

The US has a substantially greater crime rate than South Korea.

9h agoHN ↗

It does not have that much higher ceime rates

This is but one crime, but the homicide rate in the US is 5.9 per 100k, which is about 10x higher than in Korea.

9h agoHN ↗

Crime rates are not independent of incarceration rates and durations (bbviously, since incarceration is a mechanism to deter crime). We could say 'the incarceration required to reduce crime rate to x is much higher/lower in country y'.

7h agoHN ↗

How easy can you learn a skill while in jail? How easy do you find a job when you get out of jail?

That would be an interesting statistic in any country discussing number of jailed people, repeat crime, and jail time.

7h agoHN ↗

If it's a crime skill... Very easily. If it's a crime job, very easily.

4h agoHN ↗

The prisons here have programs where people who want to can complete high school and college degrees. I met a guy who had two degrees (he was in for life since he, well, killed several people.)

6h agoHN ↗

Because in US, most prisons are run by private companies. Lot of them are listed on the stock market.

5h agoHN ↗

  The reliability of underlying national murder rate data may vary.

  Homicide rates may be under-reported for political reasons.

Homicides are also a fraction of violent crime, let alone all crime.

Also, SK suicide rate is like 70% higher than US, and 50x their homicide rate; as a collectivist culture, it's not unthinkable to suspect that some of the people who would have been murdered in other countries are just shamed into taking themselves out instead.

And, FWIW, SK's 25+0.5 per 100k suicide/homicide rate eclipses America's 15+5 (roughly). If you don't want to die a violent death at the hands of a human being, the US is safer than SK.

10h agoHN ↗

A Scandinavian economist reportedly said to Milton Friedman:

“In Scandinavia, we have no poverty.”

Friedman replied:

“That’s interesting, because in America, among Scandinavians, we have no poverty, either.”

14h agoHN ↗

You think that was a good use of resources and not something deeply dystopian and authoritarian?

13h agoHN ↗

I find it deeply dystopian when the society decides poor people can travel in smelly, worn-down buses and subways because the society cannot afford to keep them clean.

Whatever you do, rich people will travel in their private SUVs, and their gated suburban mansion will never be vandalized. You can put the resource to keep the public space clean and functional, or you can decide such a thing as clean, functional, enjoyable service is reserved only for the riches. Your choice.

11h agoHN ↗

This definition of “Rich” is referring to the people who pay most of the taxes. The government hasn’t prioritized using those tax dollars for this purpose. It’s likely being utilized more so to benefit the poor and needy more than you think in other ways though, education and healthcare come to mind and are quite big ticket items.

3h agoHN ↗

They're pretty clearly being given to AI companies right now.

10h agoHN ↗

I find it deeply dystopian when the society decides poor people can travel in smelly, worn-down buses and subways because the society cannot afford to keep them clean.

Or you can give poor people some sort of support so they don't have to ride in public transit just to have a place to sleep without being exposed to the elements?

Whatever you do, rich people will travel in their private SUVs, and their gated suburban mansion will never be vandalized.

Come to Europe. Sure, the truly rich still drive in SUVs, but in general, people of all backgrounds take public transit, and "gated communities" are not a thing here.

8h agoHN ↗

Come to Europe.

I find increasing evidence that we're heading the same way as migration is used in a way that creates an underclass and the previously homogenous high trust society dismantles ever so slowly as resource constraints (graying of the population) puts pressure.

9h agoHN ↗

Yees, because we're not criminal scum.

14h agoHN ↗

A society should be willing to put resources to protect is public infrastructure.

Yes.

But California.

9h agoHN ↗

Or maybe, you know, create conditions so that we don’t have as many drug addicts? And homeless ppl starving? Not arguing against the rule of law, just saying that maybe, the “drug addict” didn’t have the choices in life others non-drug-addicts had? Maybe? Maybe not though, who knows…

4h agoHN ↗

Homeless people aren’t starving in America. (I volunteer at our nearby homeless facilities, where I’m proud my region maintains a 100% service rate - nobody who needs a place to stay is turned away, through a network of shelters, halfway houses, group homes, and subsidised market vouchers.)

In addition, they’re all eligible for government food assistance which is quite generous. In my experience, though, many people sell off their food benefits for drugs. So that’s a problem.

3h agoHN ↗

For just graffiti? That's completely ridiculous and totalitarian.

14h agoHN ↗

killer robots will solve the problem don't worry

14h agoHN ↗

Imagine if companies could pay meth addicts in meth the amount of work they could get out of them would be incredible.

8h agoHN ↗

I imagine they actually do, in that pay is just meth with extra steps. But for some reason a lot of the hiring isn't happening. Would be interesting to know where the barriers are.

4h agoHN ↗

There are lots of functional meth addicts who aren’t antisocial criminals who simply work a normal job whilst high.

8h agoHN ↗

Junkies will find ways through the fencing at night, strip copper and other materials from panels, and cause thousands in damages and lost energy just to extract enough scrap for a fix

I live in a European country, where the phone company hasn't bothered to come remove the old unused copper phone lines in the last 5 years. Thousands of dollars worth of cables running past my house alone, and no one has bothered to go strip it in the night and sell it

This feels like one of those USA problems that would be better addressed by funding decent social services (free healthcare, cheap housing, addiction treatment programs, etc).

8h agoHN ↗

In rural UK where phone lines are sometimes laid in a shallow ditch by the road, my relative's village loses their landline phone wiring every once in a while because someone stripped the whole roads-length of wire. They tie off to a trailer hitch and drive away.

Been happening occasionally for at least a decade.

3h agoHN ↗

Once in a while though, not constantly.

8h agoHN ↗

The Netherlands has one of the best healthcare systems in the EU, 30% social housing, treatment programs, one of the best drug policies...

And still has a yearly 6 to 8 million euro in damages from copper thieves just on the rail system alone. And that doesn't include economic damages from people being late for work.

7h agoHN ↗

I can only imagine what it would be without that! I was told once that in said country (and probably other lands) police tolerates some kind of small petty crimes so that things do not escalate to bigger things

4h agoHN ↗

I can't confidently refute your claims, but all of those socialist policies have backslid over time; social housing (i.e. affordable housing with eligiblity for government support to pay rent) has a 10+ year wait list in a lot of places, because there's not enough. Non-social housing is unaffordable and unobtainable for a lot of people with housing prices having gone up 2x or more since 2010.

And the social systems don't reach everyone, in part thanks to 20+ years of conservative governments. People can't find jobs, if they're entitled to one (i.e. are nationalized) they can apply for government subsidies, but those come with strict conditions including a requirement to apply to jobs on the regular (and provide evidence, and you get cut on your subsidies if you don't).

On paper it still looks good ish, but in practice it sucks if you're in the system. Health care is becoming unaffordable (creeping to 200/month just for the insurance, plus 375 or so copay which the new government wants to increase even further, which means poor people will avoid seeking health support because who can afford up to 375 on top of 200 / month, and that's not even the essentials?)

2h agoHN ↗

Healthcare is €145 a month with a €385 deductible and can be lower if you raise your deductible voluntarily. If you are low income you get €129 a month in allowance towards your health insurance. Various municipalities have their own allowances for low income people to help them pay for healthcare. The deductible is for all healthcare in the entire year, not per procedure. It has not gone up with inflation for years hence why government is talking about raising it.

Healthcare is already income based in The Netherlands. I used to pay €5000 a year as a high earner. My neighbor paid €0 per year as he didn't have a job. If poor people avoid seeking healthcare over cost they are doing things very wrong as they can seek financial help and get it.

Also I think it is good that you need to actively look for a new job in order to get unemployment benefits. It's a safety net not a hammock.

7h agoHN ↗

Swiftcoder, I don't think we Europeans have a recipe for treating fentanyl addiction.

We are just lucky that this horrible drug isn't as accessible here as it is in Cali.

BTW recently I spent eight hours in a stopped train because a family of career criminals decided to steal cables from the railway. They didn't even escape, they were immediately caught with their loot, but the damage was done and thousands were stranded on the main rail corridor in Moravia deep into the night. I was home at 3 AM instead of 7 PM.

There is no treatment for this sort of stupidity where people do damage to themselves and to everyone else because of a really bad judgment.

My friend was in prison for causing a serious road accident. Some six months. When he came back, he commented that most of the repeat offenders are just stupid as f*ck, unable to put two and two together, getting repeatedly caught over crimes done impulsively and without due preparation.

7h agoHN ↗

I really hope we don't get a California situation. If you look at the addicts at the Frankfurt train station, that is starting to look like Skid Row.

33m agoHN ↗

"Wir Kinder vom Bahnhof Zoo" probably rings a bell for you. With respect to drug addiction, in Europe/Germany at least, I'm more inclined to say "little has changed in 40 years" than to say "things are worse now".

It's sobering to think we've not made much inroads into giving addicts a better perspective (or getting "preemptive" messaging across) in all that time.

5h agoHN ↗

There is no treatment for this sort of stupidity where people do damage to themselves and to everyone else because of a really bad judgment.

I'd argue there is; why do people steal stuff? Because it's easier and more profitable than jobs they can do. What's the solution? Meaningful employment for everyone. People generally don't steal if they earn a living wage that doesn't kill them. (some still would because they get a kick out of it though but there's therapy available for them if they want to change)

4h agoHN ↗

We also have ample evidence that you can solve this sort of problem via UBI. As politically inconvenient as that result has proven to be...

3h agoHN ↗

...would that this (micro) evidence actually show that, and had any hope of practical scale without unintendeded consequences...

1h agoHN ↗

UBI is not the panacea imo. We need UBS, and not the bank - universal basic services. Whether that's healthcare, education, unemployment, free transportation, food stamps for the needy, housing loans, more government jobs, etc.

UBI was an experiment carried out during COVID and all it did was elevate prices and push a lot of people into Robinhood, while elevating the debt crisis.

18m agoHN ↗

UBI was an experiment carried out during COVID and all it did...

I would not put the one-time covid cheques on par with the various rigorous UBI and/or free housing experiments that have been run over the last 30 years

38m agoHN ↗

I do wonder; my naive expectation is that while it will solve "petty criminality out of need" it would do little to "pretty criminality out of boredom / for-fun".

And BI would be attacked for the latter - some ingrateful on-basic-income person committing vandalism for no financial benefit. It's the "workhouse"/"treadmill" argument - supposedly boredom breeds crime and people must be made to work, even pointless or below-poverty tasks, else the streets get taken over by criminals or worse.

Like tourists taking over the country.

Arguments acknowledging (and steering / manipulating) feelings weigh stronger here than economic facts, alas.

7h agoHN ↗

America is an entirely different cultural universe and simple things like this seem logical but just wouldn’t really solve the entire problem, IMO, as an American that’s lived in Europe for a decade+.

Another great example are the “open air” transit systems in Germany, Poland, etc. where you can freely enter trams and buses, with inspectors patrolling infrequently to check if you bought a ticket. That kind of system would absolutely never work in America, no one would pay, and the ticket inspectors would be hated as some kind of secret police.

7h agoHN ↗

Another great example are the “open air” transit systems in Germany, Poland, etc. where you can freely enter trams and buses, with inspectors patrolling infrequently to check if you bought a ticket. That kind of system would absolutely never work in America

This is exactly how Seattle's light rail worked for years. You could just walk on and off, and I saw an inspector maybe 1-in-10 trips at best

7h agoHN ↗

Interesting, I’ve never been to Seattle. But it looks like they are adding fare gates, so apparently it isn’t working.

7h agoHN ↗

Yeah, the system was tiny originally - just a single line from the airport to downtown. I left right before the big system expansion started, I wouldn't be surprised if scale has exposed more issues with the system

4h agoHN ↗

From what I've heard, fare compliance used to be relatively high but dropped massively (alongside ridership) during COVID and hasn't really recovered.

7h agoHN ↗

This is still the way it works in San Francisco on the buses and light rail.

5m agoHN ↗

Improved fare gates for BART have increased revenue and dramatically reduced maintenance costs:

"Comparing the six month period before the 'next generation' fare gates debuted, to the six months that followed, Embarcadero station saw a significant reduction in the need for maintenance work — from 112 hours to two hours. "

...

"When you see how dramatically these maintenance requests fell, the numbers tell us that these fare gates are preventing unwanted behavior that impacts the station environment," BART spokesperson Alicia Trost told the Chronicle. "Those people are no longer entering BART."

https://www.transittalent.com/articles/index.cfm?story=BARTs...

7h agoHN ↗

This is how VTA light rail works in San José.

6h agoHN ↗

My daily commute is by open air rail in Chicago.

Me and my fellow commuters know snd like our conductors.

6h agoHN ↗

The Netherlands is phasing out open air transit because it doesn’t work. Aggression towards public transit service workers is at an all time high. Most stations have moved from no barriers to barriers over 2 meters tall. Refugees have their own bus lines.

Society is going backwards in rapid pace I’m afraid.

2h agoHN ↗

From high-trust homogeneous populations to low-trust heterogeneous populations.

54m agoHN ↗

That is factually incorrect. The Netherlands is not phasing out open air transit (barriers are only a thing at the high-volume stations) and the barriers are rarely 2 meters tall (at most stations they are waist-high).

The "refugee bus line" is a single ferrying route between a rather awkwardly-placed arrival center and its nearest train station. The main issues were caused by refugees being unable or unwilling to pay the bus fare, and considering all of those refugees are living off an allowance anyways, having the arrival center itself pay for the buses and making them "free" really is a no-brainer solution.

4h agoHN ↗

There seem to be a fair number of commuter train lines that do this, but I don’t really consider a train to be the same as an urban tram/bus system. The latter has orders of magnitude more daily passengers, and it’s a far wider breadth of people compared to the typically better-off suburban commuter lines.

And as someone that’s ridden the bus in LA many times: the culture of acceptable behavior there is infinitely lower than the typical Central European bus.

To be fair I did have NYC in mind when writing the comment though, and I should have looked into west coast systems more.

3h agoHN ↗

Seattle's light rail system uses that exact model.

3h agoHN ↗

It's also how the San Diego trolley works (it's called a trolley, but it is almost a heavy rail with respect to how separated the tracks are everywhere except downtown). One of the cleanest, most effective rail systems I've seen in the US (though there are a lot of security in the wagons)

3h agoHN ↗

That's how both the SBS buses in NYC used to work (before tap to pay), and how the NJ Transit light rail still works.

2h agoHN ↗

Portland’s light rail works this way.

I find it interesting to see how often criticisms are leveled at the US confidently based on ignorance.

2h agoHN ↗

Yes, I should have looked into West Coast systems, as they seem to have this more. I had the East Coast/NYC more in mind.

However, I wouldn't be so confident about Portland's working well:

The transit agency has identified a significant increase in fare evasion, prompting the introduction of new technology to control access at train stations...The report said TriMet has the third highest amount of fare evaders in the country, trailing only San Diego and Los Angeles.

https://katu.com/news/local/trimet-considers-adding-gates-to...

6h agoHN ↗

Copper theft is definitely an issue in Ireland.

6h agoHN ↗

This feels like one of those USA problems

In the uk rail industry we have people stealing copper all the time. They cut a live cable, attach it to the back of a truck and drive off. Sometimes this can yield them kms of cable.

We also had issues where people would jump over fences into depots, use scaffold boards to build a ramp over the 2.5m fence, and then use forklifts to roll big reels of cable up the ramps and over the fence on to the back of a waiting truck the other side.

Copper cable theft is 100% a massive issue in the UK.

5h agoHN ↗

In the uk rail industry we have people stealing copper all the time.

The elephant in the room is naming the group almost exclusively responsible for this crime.

5h agoHN ↗

Does it matter? Because if it does, it's advocating for (racial?) profiling and/or singling one demographic out, which is both illegal (maybe not in the UK since it doesn't have a constitution?), amoral, and contrary to one of the core principles of current-day law, i.e. "innocent until proven guilty".

But do tell, what do you think is the group and what do you think should happen?

3h agoHN ↗

If a certain group of people are the ones constantly causing the majority of the same specific societal issues, why shouldnt they be called out?

5h agoHN ↗

This feels like one of those USA problems that would be better addressed by funding decent social services (free healthcare, cheap housing, addiction treatment programs, etc).

What are you going to suggest next? Hot lunches for kids and a justice system focused on reform?

5h agoHN ↗

California already has those social services; that doesn’t stop antisocial people from doing antisocial things. A tiny fraction of people can cause a lot of damage.

There is a part of California that still has ancient telegraph lines complete with weathered copper with the blueish colour. Nobody has come by to scrap it yet. So it’s really a matter of proximity to wherever antisocial people choose to live.

4h agoHN ↗

Copper price more than proximity. People don't strip wires for shits and giggles, they do it to sell the metal.

Bet you if copper price suddenly went up 10x, those ancient telegraph lines would disappear very quickly, one way or another (turns out, "criminals" and "junkies" and "entrepreneurs" are driven by similar incentives, they just sit at different points of the cost/risk tradeoff spectrum).

4h agoHN ↗

wherever antisocial people choose to live.

Are we going to discover that, by some striking surprise, antisocial people choose to live in places with weaker social support?

3h agoHN ↗

Seattle/Portland/San Francisco. I think you're on to something.

4h agoHN ↗

California has those services but they tend to be only funded to a fraction of the need. And the gap between the need vs help is a deep gulf due to how inequality lands on all other public and private areas of society

2h agoHN ↗

California's 2025-26 budget for health and human services was $307 billion for 39 million people. Compared with France at $370 billion for 67 million people.

2h agoHN ↗

There is a certain gulf in the efficiency of spending for sure

2h agoHN ↗

I wonder how much of that per-person cost difference is due to government-run versus private-industry-run.

1h agoHN ↗

Providing healthcare alone under the US system as the state of CA vs the French system could account for a large amount of the difference.

2h agoHN ↗

"California has those services but they tend to be only funded to a fraction of the need."

Sometimes it feels like they are well funded but the people running the programs live in a (very expensive) dream world that has no connection to the actual need.

3h agoHN ↗

California claims to have those social services. Does it actually, or are they impossible to actually get?

28m agoHN ↗

We do, but they tend to be clustered around urban areas. There’s vast swaths of CA that lean much more conservative and more economically challenged that are under served.

I think a lot of people don’t realize you can go 2-2.5 hours out side of SF and be in CA MAGA country.

5h agoHN ↗

Yes. California is famous for cheap housing. Excellent point.

5h agoHN ↗

Europe has plenty of copper theft problems though, but they go for e.g. train lines because they don't know you've got copper phone lines running past your house.

4h agoHN ↗

I was traveling in Europe about 15 years ago, I was going from Paris to Barcelona and the train stopped for seven hours. Turns out a whole copper cable was stolen (live wire) so yeah Europe does have this problem too apparently.

1h agoHN ↗

People tend to notice when there are some shady-looking people digging up wiring outside their homes - especially when it coincides with them losing power or connectivity. And it's not like there is much copper inside them, either.

A huge part of the train lines are fairly isolated, and there's an easily-available schedule of when people (trains) will be there - often even with real-time GPS tracking. And there's a lot of wiring buried there.

3h agoHN ↗

I live in a European country as well (Spain) and there are probably in the order of 10+ railways incidents per year causing serious issues to mobility due to copper theft. Buy yet, the old copper phone lines are still there...

3h agoHN ↗

One can dream but your solution is wildly unrealistic.

Its actually not just junkies, you get organized criminals who are stripping solar assets of $ value items.

3h agoHN ↗

Uh copper theft was quite a problem along Belgian train lines for a while.

3h agoHN ↗

it's possible that your line is simply isn't known enough to close enough junkie population

3h agoHN ↗

I live in a European country, where the phone company hasn't bothered to come remove the old unused copper phone lines in the last 5 years. Thousands of dollars worth of cables running past my house alone, and no one has bothered to go strip it in the night and sell it

Isn't that because they're still flat out on rolling fibre out? There's not that many telecoms engineers and if they spend tons of time removing the old, that slows down the new.

1h agoHN ↗

Isn't that because they're still flat out on rolling fibre out?

Spain's rollout is up in the last few percentage points (>95%) of fibre coverage, in this particular region we reached saturation of the entire rural area 5 years ago.

Plenty of time for those disconnected copper cables to go walkabout if anyone were so inclined. Realistically, in a region where the population skews older and most everyone owns property, it's probably not worth the risk to fence it

19m agoHN ↗

We're still quite some way off that in the UK. Copper lines still working though due to shut down by next year I think. Lots of older people with no internet left in the lurch with phone lines with that of course.

1h agoHN ↗

How much cable are we talking about here and can you go into more detail about where your house is located...?

Joking aside, I'm not sure that metal thefts can totally be blamed on addiction.

I used to work for a large British Telecoms company, that shall remain nameless. They regularly suffered from certain mobile sections of the community stealing metal.

They would do things like hack phone cables from telephone polls, attach them to an SUV and attempt to rip them out of the ground, with varying levels of success.

A week later the same people would break into a works yard in another part of the country after reels of fresh cable. The empty reel would usually be found in a field somewhere after they'd used petrol to burn the casing off.

I don't think the people involved were doing it for want of housing, healthcare or addiction treatment, as we have all of that in the UK. They just saw it as a source of money.

Once the law changed to make it a crime to buy scrap metal without a paper trail that cut that down massively.

1h agoHN ↗

Once the law changed to make it a crime to buy scrap metal without a paper trail that cut that down massively.

Yeah, that seems like a pretty reasonable solution, all things considered

8m agoHN ↗

There are people who will give you that paper trail, for a price.

7h agoHN ↗

Stripping out copper... the USA has joined the ranks of post-Soviet Europe, where such thefts are (or have been at some point) routine. Infra-harvesting.

3h agoHN ↗

its called recruitment. You deteriorate your surrounding, creating more deprecated areas and taxes on industries, who close shop not paying taxes, thus creating more economic zombies. Who then crate black outs, deteriorating power lines, thus allowing for more copper theft.

They may hide the bitemark, but this future has a been biten. Its going to turn.

3h agoHN ↗

Face to face, or razor wire. Barriers do work, but only if you pay for something more than chainlink. And the math is interesting as the bigger the field the less barrier is needed proportionally.

1h agoHN ↗

Everyone is replying to my comment to talk about social nets and failures in the justice system, but I agree that the math is a more interesting challenge. The site I was talking about is thousands of acres in an undeveloped area, and while you accurately note the barrier is more cost effective, the number of patrols and response time for incidents (including false alarms) grows with scale. The owner could lock down the site like a fortress from a James Bond movie, but let's not forget that those thousands of acres are just gathering sunlight, so at some point it stops being cost-effective.

And I mostly introduce this issue as a contrast to panels on developed land like the canals, which serve other functions and are less likely to have the risks associated with such a single-purpose site.

1h agoHN ↗

I don't really love how this completely imaginary, totally made-up, unsupported anecdote has caused 40% of the posts on this HN story.

19h agoHN ↗

It seems like it would be more effective to simply put all the solar panels in a field, and construct a cheap shade over the entire canal no?

No because now you're using land that could be used for other things, which is exactly what this avoids. This takes existing land that loses water and costs money, and makes it lose less water and make money.

19h agoHN ↗

That’s true of everything you build. The cost of land has to be taken into account, but land is much cheaper in some areas than others.

17h agoHN ↗

In California most of the land around the aquaduct is valuable cropland. The other side of it is at risk of wildfire.

16h agoHN ↗

That's true in general, but California aqueduct land is mostly valuable cropland, and the other side is at wildfire risk

4h agoHN ↗

Did anyone else get weird deja vu from the sibling comment? And I can't figure out which one is the clone. cryptolobster posted about 1 hour after zdp7, but they both have good posting history.

18h agoHN ↗

You are assuming that land is expensive and forgetting that building and maintaining panels over long a canal is harder than building over a large plot.

18h agoHN ↗

Harder but obviously not physically impossible either. From the image I can't imagine what the showstopper would possibly be. Technician on a little dinghy instead of a stepladder doesn't seem like a big deal. Presumably they make it where you can pull the panel off easily if you need to.

17h agoHN ↗

You're talking about something that is probably at least 10x the cost to build and maintain. You're making something simple, like swapping a single solar panel, from a ground-level one-man job into now a multi-person job with specialized equipment and water hazards.

14h agoHN ↗

Thats 10x the cost somehow? I doubt it. They put solar in all kinds of awkward areas where a technican can't just show up and turn a screwdriver from ground level. Seems it works somehow. Chances are if they go with this, they will have some maintenance craft like a barge platform I'd guess, where the job would be made effectively no different than a ground level job (aside from bringing over the barge which could be quite simple in design, e.g. wood platform raft made from drums and a cheap outboard motor on one end, it's only in the aqueduct after all not in any open water or current.)

8h agoHN ↗

Many of those installations end up abandoned when the cost to repair them exceeds the value of the output of the panel.

You just typically don’t notice it because unless the panel is severely damaged, a non-functional panel doesn’t look much different than a functional one.

32m agoHN ↗

The showstopper is spending $1,000 of tax payer money for what could be accomplished with $10.

2h agoHN ↗

No I'm not. I'm assuming that existing unused land should be reserved for better projects when we have currently used land that both can do more and where this helps save water. My comment had absolutely nothing to do with the price of land. Everyone else is missing the "water conservation" part because they're distracted by the solar panels and are getting nerd sniped. This isn't a solar first project, it's a water first project.

15h agoHN ↗

You're also not getting the free cooling capacity of the water which makes the panels more efficient - though that probably only drops the total cost 5% or so, but how much extra the heavier supports cost may not be much more...

2h agoHN ↗

Of all the ideas ever tried, this one seems to be the worst

2h agoHN ↗

Not if the goal is preventing evaporation. Vertical panels in farmland solve a different problem than this does.

19h agoHN ↗

How about hanging solar panel vertically on tall buildings covering every floor except the first few to prevent vandalism

As the earth moves the sun would only hit one side and lose efficiency but right now it's "free space" not being used otherwise

They even make flexible solar panels now that can bend and move with the wind and don't need a stiff frame, slightly less efficient but volume makes up for that

Clean them the same way automated window washers work on skyscrapers

Shame they never came up with the solar paint solution, yet

18h agoHN ↗

How about hanging solar panel vertically

The best explanation I've heard is from a PV installer. He said, "Every try to get a suntan standing up?" Seems you lose too much sun exposure to make it worthwhile.

18h agoHN ↗

"Every try to get a suntan standing up?"

I didn't try to get a suntan, but I have gotten tans while standing up. It's called working outdoors (and not properly covering up, which I'm paying for now).

That said, the economics of vertical installations have changed. The cost of panels keeps going down, and as it does it's starting to make sense depending on your location and how you're orienting your vertical panels. Remember, almost all solar panel installations will be suboptimal unless they include a mechanism for tracking the sun. The question is how bad is suboptimal, what's the cost of the panels and what's their energy yield?

18h agoHN ↗

Distance from the equator helps. As does if it snows where the panels are, then vertical simply not having snow on them plus the reflection of the snow helps quite a bit in winter.

18h agoHN ↗

I've got many a sun burn standing as has anyone else who's toiled away outdoors doing something while shirtless and white...

I suspect it's more of a "hassle ain't worth it to lose 20%" type situation.

Could absolutely be worth if you can make that 20% back dodging permits because it's not flagrantly visible on the aerials like roof panels are.

18h agoHN ↗

I'll assume that installer is not near as Irish as I am.

17h agoHN ↗

Vertical mounted bifacial panels are more efficient than horizontal mounted panels.

9h agoHN ↗

? So everyone around the Mediterranean has a tan because they're sunbathing?

17h agoHN ↗

Wouldn't the rooms inside need more lighting then? I wonder about where the break even point is on those differences. I'm not educated in this area enough to even guess.

6h agoHN ↗

I assume they mean on the bits that don't have windows. Though caution would be required there; you have to be very careful about tall building cladding material (see https://en.wikipedia.org/wiki/Grenfell_Tower_fire).

Lighting, incidentally, is practically _free_ these days. An EU 'A' rated LED bulb has to do 210 lumens per watt. So the equiv of an old-fashioned 100W incandescent uses 7.5W.

7h agoHN ↗

It’s hard to retrofit that on existing buildings for reasons of structural integrity.

7h agoHN ↗

I see a lot of vertical solar here in Finland. Particularly on newer and/or industrial buildings. I think it's mostly a cost/effort/ROI issue plus sheer unwillingness to do new things.

18h agoHN ↗

It seems like it would be more effective to simply put all the solar panels in a field, and construct a cheap shade over the entire canal no?

Yes, absolutely. But if you try and do that kind of stuff and the regulators show up and kick you right in the dick. "You got a permit to put panels on this land?" "Where's your SWPPP?" "Where's your environmental impact assessment for shading that canal?". And HN cheers.

But if you say you want to cover the canal with solar panels out comes the rubber stamp because that's what the powers that be want to "incentivize" this week.

Does the success of populists make a little more sense now?

18h agoHN ↗

construct a cheap shade over the entire canal

That aint' gonna fly - you're going to have engineering requirements for a 100' span wither it's a shade structure or a solar panel. And don't even think about fabric shade sail types of things, nobody is going to want to replace those every 3 years.

it takes 1/6 the time to build on developed land compared to undeveloped land.

This is not something you can just ignore

15h agoHN ↗

That ain't gonna fly - you're going to have engineering requirements for a 100' span wither it's a shade structure or a solar panel

Bingo. "cheap shade" is doing a lot of work. Typical for this kind of drive by "I've thought about it for 5 minutes but the people who worked on this project must be stupid".

13h agoHN ↗

To be fair, there are fabrics that last a long time. ETFE is an example. A fair comparison should price the solar cover against fabric.

That being said, solar panels are not that heavy, and fabric is every bit as subject to wind loading as solar panels.

17h agoHN ↗

There isn't a need for more copper. The canal already has electrical transmission lines.

Almost all the fields in the area is being used for valuable crops. It would be difficult to harvest them if solar panels were installed.

The wind on the valley side of the coastal range is intense. A cheap shade will need considerable maintenance.

There is little chance two separate projects would be cheaper than a combined project.

16h agoHN ↗

21GW of Solar for California Land That Can No Longer Be Used for Agriculture - https://news.ycombinator.com/item?id=46488648 - January 2026

https://valleycleaninfrastructureplan.com/

In this context, covering canals reduces evaporation in addition to effectively being free space for solar PV; if the labor and material costs are reasonable, the land is free forever versus a land lease for ground mount utility solar. As of this comment, there is ~101GW of solar in California’s grid queue pipeline per https://www.interconnection.fyi/?state=CA

Is this enough solar? Just keep building. Enough sunlight falls on Earth every ~30 minutes to power humanity for a year.

https://www.eia.gov/energyexplained/solar/where-solar-is-fou...

16h agoHN ↗

Put the solar panels in a field

They paved paradise, put up a solar array.

The supports in the picture are massive and don't look cheap.

They're load-bearing.

16h agoHN ↗

A desert isn’t exactly paradise. A whole lotta desert in California.

15h agoHN ↗

Using solar to generate electricity uses far less land per unit that growing corn ethanol

16h agoHN ↗

Solar panels don’t weigh very much at all. I would think the difference in weight between building a durable shade system that can weather the elements, and something that can hold solar panels is not very big at all.

15h agoHN ↗

Land is expensive you are not counting the cost of land itself.

14h agoHN ↗

In this case they have to build an expensive structure to cover the canal anyway. The span is large. Putting solar panels on it increases the loading and requires a slightly stronger structure, but might improve the financials of the project enough to make sense.

14h agoHN ↗

This is directly addressed in the article.

13h agoHN ↗

That massive structure is unnecessary. Just add vertical solar panels on either side and that will add 4 hours of additional solar production.

12m agoHN ↗

That won't reduce evaporation from the canal.

13h agoHN ↗

It would be far easier to build solar on highways. The median strip on interstates is quite wide.

13h agoHN ↗

Those are oftentimes safety features designed for cars to survive entering without anything to hit.

7h agoHN ↗

And anything near a road (including rail) will be pelted with rocks and dust full of metals and organic compounds. Anything sensitive to those needs some clearance from traffic.

13h agoHN ↗

I think someone made the mistake of calculating that the canals cover an absurd area, usually mapped by easement area instead of actual geometry. They’re absolutely right that permitting would be easier, without accounting for the fact that the majority of the canals run through the Sierras*, and that the California Water Project is the biggest consumer of power in the entire state (to pump water over the mountains).

Yeah sure, let’s put solar panels over the last section in Bakersfield where all the canals merge. More power, less evaporation. That’s great! But it’s not going to move the needle in California.

* if you go backpacking in the Sierras you’ll often run into one of the canals. They’re both cool and scary. It takes hours to get to them and every time I see one i have to wonder how they managed to build it (it’s been decades so any construction damage has mostly grown over)

11h agoHN ↗

The article + linked study also point out that performance of solar is higher around water bodies.

11h agoHN ↗

The supports in the picture are massive and don't look cheap.

They look like ordinary “bents” for prefabricated metal buildings which are about the cheapest kind of building per square foot. Made out of steel, they are typically sold at a cost per ton like other steel shapes.

The cost of the scheme is in maintenance. No ground level access. No easy way to service panels in the middle of the roof. And lots of electrical current if you need to do something during day light because solar panels don’t turn off.

So I agree it is a dumb idea but not because of the cost of steel but for the lack of modularity and abundance of inaccessibility.

9h agoHN ↗

No easy way to service panels in the middle of the roof

Cherry pickers like they’re used for every other type of infrastructure.

8h agoHN ↗

Those cherry pickers are used to access things above them, and a little to the side.

In this case, it is a ton to the side, and only a little above. And the cherry picker would be on dirt, which is not a very stable platform

Not going to work.

3h agoHN ↗

Construction already uses cranes for longer spans than this. They already know how to brace them on dirt as well. There is nothing large about this - they need slightly larger machines than you would expect at first because they can't be right next to the ditch, but nothing that construction doesn't already deal with in other situations.

3h agoHN ↗

And you think that’s cheap or easy in the middle of nowhere?

Almost anything is possible with enough money.

1h agoHN ↗

It is routine all over. Construction is always a game of moving people and equipment where the work is. There are a lot of people in construction who never work in the same city for more than a year, they just live in a local hotel and move the crane as needed.

I suspect this is cheaper than many projects just because the work is consistent - once you have the canals covered you keep a crew around to repair/replace them. That is you will need one crew full time within 2 hours of some small town so you hire someone who is willing to live in that small town (they get to go home to their family every night unlike the construction crew above working in a different city every year)

1h agoHN ↗

Yes and this project is an example.

Jordan Harris, once a Virgin Records executive who had a hand in turning acts like Paula Abdul and The Smashing Pumpkins into household names, now serves as co-founder and CEO of Solar Aquagrid. He says the $20 million Project Nexus has done much more than serve as simple proof of concept.

https://solarbuildermag.com/projects/california-completes-wa...

1h agoHN ↗

Cranes are expensive, even small ones. And you need a bigger crane quickly when you have a horizontal reach.

And keep in mind all that reach is over live electrical panels.

8h agoHN ↗

> And lots of electrical current if you need to do something during day light because solar panels don’t turn off.

No. Lots of voltage (potential) but current only if you tap it. Panels will charge to a slightly high voltage state but do not become a problem.

8h agoHN ↗

While yes, these are cheap for steel structures, calling them cheap overall is silly. They literally cost more than the canal under them to make (assuming basic earthmoving and concrete formwork), especially when you include the cost for the footers.

As a way to save water, maybe. But it makes no sense as a way to make electricity. Someone else did the math, and it was approx $10/watt, which is silly.

1h agoHN ↗

The steel and concrete have the same materials cost as steel and concrete for ground mounted panels.

The large scale members usually mean there is less labor cost and mobilization time, and hence overhead (insurance, fencing, trailer, etc.). Like I said pre-engineered metal buildings are about the cheapest cost per square foot you can get at scale.

39m agoHN ↗

This is simply not true. I-beam's 4 ft deep, arched over a 100 ft wide canal would not be the same cost as a ground Mount system.

No commercial solar farms use large members to save on labor costs.

Standard ground mount equipment also uses pre-engineered metal, just of much lighter weight due to supporting a small fraction of the load.

7h agoHN ↗

Solar panels are cheap these days; wouldn’t be terribly surprised if they take the data center approach (if a few machines die, well, who cares, deal with it next time a major overhaul is required).

3h agoHN ↗

I would expect a middle ground. They collect statistics from the inverters and when one doesn't report, or reports lower than expected levels they schedule maintenance for next time somebody is there anyway. But yeah, they probably replace a whole string of panels at once. I expect someone will design a crane for this purpose so the whole string can be done quickly - most of the work is at ground level.

I'd also expect that they have a crew to wash them off once in a while (I'm guessing yearly), but this is cheap labor not electricians.

5h agoHN ↗

    > The cost of the scheme is in maintenance. No ground level access. No easy way to service panels in the middle of the roof. And lots of electrical current if you need to do something during day light because solar panels don’t turn off.

This is classic HN "armchair critic" comment. Yeah, I'm sure the designers didn't think about any of these issues. If they need to clean the panels, they can use a cherry picker. If they need to service the electrical components underneath, they can wait until the canal is drained (usually once per year for cleaning), and, again, use a cherry picker.

4h agoHN ↗

I don’t even trust California to remember where they put these solar panels

1h agoHN ↗

For clarity I was using “service” in a technical sense.

Ground mounted panels can be serviced from a bucket truck right after a hail storm or other disaster. Disaster recovery is a critical design criterion for electrical infrastructure and the bucket truck is the standard electric utility service vehicle. Electrical utilities depend on each other and dispatch their fleets of bucket trucks across the country to aid in disaster recovery. If you drive much across the country, you might come across convoys of bucket trucks deploying down an interstate.

Which is to say cherry pickers don’t easily scale to handle the kind of critical events that need to be handled with electric utility infrastructure (and as an aside, in a pinch ground mounted solar panels can probably be serviced from a half ton pickup).

For context, in a former life I was an architect and one of my clients was an electrical co-operative. I also know a lineman socially.

You can read more about this project and the players in this article and draw your own conclusions:

https://solarbuildermag.com/projects/california-completes-wa...

32m agoHN ↗

Having to rent a cherry picker and being able to do maintenance only during a limited time per year significantly increases the cost of maintenance compared to an installation you can trivially access from ground level year-round. Canals being long and narrow don't exactly help either.

Sure, it can be done, but strictly from the PV perspective it doesn't make any economic sense compared to a regular solar farm when there's still plenty of land available. Similarly, from a "preventing evaporation" perspective going for a plain corrugated metal roof might not be much cheaper in installation, but it will be significantly easier to maintain.

Just because two thing can technically be combined, doesn't mean it makes sense to do so.

10h agoHN ↗

One of the first things I do with the top comment of any topic on any platform is to question it with great scrutiny before choosing whether to send it up, or down, or leave it as it is... or to comment about that comment myself.

Your comment, which I found at the top of the stack here, did not survive the first pass of that scrutiny.

It seems like it would be more effective to simply put all the solar panels in a field,

Yeah, sounds nice. But the desert surrounding popular parts of California does have natural life. It has life whether it is owned by someone (who can make a stand to say "No"), or it is owned by the public. The life there doesn't know.

But that desert life, even when it it seems insignificant, still needs light in order for it to survive. It has a very narrow ecosystem in which it can survive.

and construct a cheap shade over the entire canal no?

This is what a cheap shade over an artificial canal tends to look like when it is meant to survive the elements. (This particular shade under discussion just happens to also to produce electricity from solar energy.)

The supports in the picture are massive

As they would also be for a shade

and don't look cheap.

None of these activities are ever cheap.

Also I would imagine the solar array uses more copper than a similar capacity array just built in a field.

It's good that you can imagine things. Some people are not so-blessed.

You can't daisy chain multiple miles of solar panels together, so you need an extra power line to run alongside the whole thing.

Oh. So, you caught everyone with their pants down! So clever. Big Copper should be very ashamed of themselves right now because, by way of your plan, the gigantic expense of copper for a large solar farm has been increased to a slightly-larger expense! The entire ploy to cover the canals was a sham all along that was motivated by selling more copper!

Please, tell me: Would you want to receive the Nobel prize directly, or would you rather be seclusive and receive it by proxy?

Put the solar panels in a field: The solar array uses less copper.

You're free to spearhead a movement to do that yourself, if you're so-inclined.

And hey! When you do, then at least some of the water supply canals will be already covered! That hard part will have already been done. Win-win!

10h agoHN ↗

You didn't read the article, did you?

There are many benefits to doing it this way: reduced evaporation, reduced algae growth, reduced permitting, and also cooling for the panels which improves their efficiency.

10h agoHN ↗

So, how many fields are there that cannot be used for other things? It seems reasonable to position solar panels over things that are already serving some purpose and the quality of that service will not be negatively affected by a solar panel placement above it.

9h agoHN ↗

It seems like it would be more effective to simply put all the solar panels in a field, and construct a cheap shade over the entire canal no?

Not if you already own the canal but would have to buy or rent the fields.

9h agoHN ↗

I like to point out once you leave urban areas land is really cheap. And land without water rights or with poor soil is really cheap.

9h agoHN ↗

Acquiring a lot of cheap land can still be expensive if it takes you a lot of time to process everything.

Plus the people selling it to you will simply play you off each other since you're publicly committed to buying it. Like with that train they're building.

9h agoHN ↗

The shade supports don't have to hold up solar panels: Shade supports cost less.

If you look at the photos, the solar panels are mounted directly on the supports. If you wanted a simple shade for the canal, you would have to mount some kind of roof on the supports instead of the solar panels. Granted, the solar panels probably weigh a bit more than simple sheet metal, but that is probably more than made up for by the benefit of generating power.

8h agoHN ↗

putting tarp over the canal might be an even cheaper solution? You dont need metal to make shade.

8h agoHN ↗

PV itself (not the inverters etc., the panels) is really really cheap.

Tarp is about the only opaque covering I've found that's cheaper than PV, per square meter.

However, even for a balcony PV system the frame is about 25% the price of the panel, and balcony systems are tiny frames; I don't want to even guess about those huge steel I-beams and concrete pads. For big things like this, the cost of the frame is unlikely to go away because you need to care about wind load.

That really leaves maintenance costs (how often do you need to replace the tarp?) and revenue (PV makes money, a tarp does not).

5h agoHN ↗

not if you want to suspend it above the water.

Tarp, and pitch it across the canal like how you might do a hammock - you just need two anchor points on each side (or 4, at most).

4h agoHN ↗

We’re discussing permanent cover. A tarp barely lasts a year (or 3 if using very heavy duty fabric).

7h agoHN ↗

That sounds like a huge maintenance headache.

38m agoHN ↗

Based on my experience in NM (higher elevation, similar insolation), the expected life of tarp-like materials in open sunshine here would be 2-3 years.

Sunshade material could be more like 5-8 years, but is significantly more expensive.

8h agoHN ↗

Not from USA so forgive my ignorance.

Shouldn't the obvious solution be to fix the "permitting requirements" rather than spend 6x on building kn undeveloped land?

Should the purpose of laws to serve the people rather than to tiptoe around laws and claiming "be we have strict zoning laws"?

Why is there a law that you yourself call "insane"?

8h agoHN ↗

Changing permitting laws can take ages if it works at all.

3h agoHN ↗

Easy to say, but nobody will agree to changes. People know how things are and don't like change, even if it would be for the better. In many cases things would be better overall, but the voters who care are the ones that would be worse off.

7h agoHN ↗

And water evaporation… and using land makes the land unusable for other purposes… But your comment raises a good question. What are we looking for? The best solution or the cheapest solution?, is the chepeast solution the best?

4h agoHN ↗

The land can be compact: shaped like a square with minimal perimeter. For the same area along a canal, with winding corners, it would seem like a far longer run. This is especially worse depending how inverters are since DC along long transmission is less efficient.

3h agoHN ↗

yeah there's no shortage of land, but with canals you've got multiple layers of infra, maintenance, and permitting happening in the same place so you've got some advantages

3h agoHN ↗

mind that you treat land as free, tho

2h agoHN ↗

There are a lot of places in the country that are putting up solar panels on what is otherwise arable land (eg New York). And... it's a problem. With climate change in mind, you should be using land that is otherwise not usable for anything else productive because there's plenty of it.

In the Southwest for example (eg NM, AZ), you have plenty of desert and sunshine-hours. Solar panels also tend to get less effective the hotter it is so it's a balancing act. But those states should be plastered with solar and they should be exporting it to neighbouring states. Colorado is actually kind of ideal for this too. In that case, it's mountainous terrain.

Also, IMHO there shouldn't be a parking lot in the country that isn't covered in solar. But that's a separate issue.

1h agoHN ↗

construct a cheap shade over the entire canal no

Unless you can provide concrete numbers and do a side-by-side comparison, you have already lost the argument.

Plus I am sure you are not the first person to come up with the idea.

50m agoHN ↗

I think it's the exact opposite. If someone is going to propose a project with costs of hundreds if not billions of taxpayer dollars, the burden is on them to provide concrete numbers.

1h agoHN ↗

From what I read and watched on this topic, not all of the canals are all gravity fed and there are sections that require pumping. This gives a great local source of power to use in all operations in processing and moving this water.

37m agoHN ↗

All those pumping stations are already connected to a grid that provides consistent power sourced from dozens of power plants.

3m agoHN ↗

I wouldn't touch fields or canals. The US has incredible amounts of parking lots. They are also mostly built in very developed parts of the land with a lot of users for electric power in close proximity. And a parking lot is already "sealed ground". Might be less problematic to get a permit there?

Additional plus: cars don't heat up in the sun. And at some point you might even charge EVs there.

19h agoHN ↗

oof, that is a crap ton of steel. I doubt those panels will ever harvest enough energy to offset the energy use to produce both the cells and supports.

I imagine with cells in that configuration, lifting wind loads are significant which is why it's overbuilt like that.

Perhaps some laminate timber for the cross supports?

Lastly, the US has got to start eating seasonally. The water problem in the southwest is all agriculture: people want to grow baby spinach in January. Unless we figure out a way to create a crap ton of energy cheaply so we can supply industrial sized flows without worrying about the energy cost, we use far more water than we should in California and Arizona.

19h agoHN ↗

Electricity is incidental (and a nice benefit) to the goal of "reduce evaporation of water from the irrigation canal and improve water quality".

The duo went on to start Solar Aquagrid, an advocacy firm dedicated to reimagining aging canals, and partnered with the Turlock Irrigation District, UC Merced and the California Department of Water Resources to cover small sections of Turlock’s canals with solar panels. The new “solar canal” provides shade to limit evaporation and generates power all in one neat package. They call it Project Nexus, and it operates at the intersection of the state’s need for clean water and energy.

...

But the canal site hosts more than just panels. Bales said they “have instruments out there to measure temperature, relative humidity, wind speed, incoming radiation, outgoing radiation, and a prototype instrument to measure evaporation directly.”

When it comes to algae, the panels helped. “Last year when we drained the canal at the end of the irrigation season, there was a physical line on the sun side of the canal that had algae growth and then not algae growth from where the shade was,” Weimer said.

That it's green energy and can help supply the power demand is a bonus.

19h agoHN ↗

I doubt those panels will ever harvest enough energy to offset the energy use to produce both the cells and supports.

While I agree those steel supports are large, that seems insanely wrong to me, but not an expert so curious if someone with more info could comment.

19h agoHN ↗

According to my searches, steel production is something like 6-8 MWh/ton to extract, refine, and shape. A solar panel lasts 25 years at up to 80% effiency. This thing produces 1.7MW at peak. so call it 3 MWh/day average to account for a lot of adverse conditions over the lifetime. Thats 27000 MWh... so unless we are looking at more than 3000 tons of steel (we aren't) the steel production is accounted for. A panel takes something like 1.9 MWh equivalent in energy.... and again we aren't looking at 13K solar panels in this pilot.

So yes, in fact this does generate far more energy than goes into its production.

9h agoHN ↗

A solar panel lasts 25 years at up to 80% effiency.

Just a nit, that should be:

A solar panel lasts 25 years at up to 80% of its original effiency.

19h agoHN ↗

Steel takes about 4.750 kw-hours to produce per kg.[1]

A 450W solar panel will make roughly 562 kwh a year in California.[2]

So one panel running for one year offsets 140kg of steel production, roughly.

Thats an I-beam based structure so it's weight efficient and a heck of a lot more then 1 solar panel are going to fit on it.

Judging from a local steel supplier[3] and some span tables it looks like you'd need about a 360mm or so I-beam to bridge a 115 ft (30m) channel (the structure looks more efficient then that though) so call it 50kg per meter. So one span is probably ballpark 1500kg of steel.

A 450W solar panel is about 0.7m wide, the structure is fully covered so call it 42 panels per span offsetting the energy production of a little over 5900kg of steel per year (and it doesn't look like we're putting one solid I-beam per row of solar panels either since I see lightweight spanning channel in there).

[1] https://solar.lowtechmagazine.com/2009/06/how-much-energy-do...

[2] https://www.cahomesolar.com/feeds/blog/solar-panel-energy-pr...

[3] https://www.mascotsteel.com.au/wp-content/uploads/2018/10/st...

18h agoHN ↗

Furthermore at the end of the steel structures lifespan it will be recycled in a manner that is far more energy efficient, requiring only 25% of the total energy. And that's in the case it wasn't from recycled materials in the first place.

11h agoHN ↗

The fact that HN is filled with so many who are weirdly against renewable energy is baffling.

Yo! Wake up sheep! Solar and wind energy are the two cheapest and least polluting ways we have of producing energy!

6h agoHN ↗

HN is kinda ground-zero for i-am-very-smart contrarians, so it's not _that_ surprising.

(Also, in the US, "solar panels take more energy to make than they produce" is a popular, although entirely false, talking point in right-wing media, so propaganda plays a part too. This claim has also been made about wind, and, bafflingly, _nuclear_.)

19h agoHN ↗

Lastly, the US has got to start eating seasonally.

Fair. But the almonds and alfalfa would like a word, especially since the alfalfa is shipped around the world for others to consume in some way.

So while it's definitely agriculture as a serious source, it's not just the US as the driver of that source.

4h agoHN ↗

It’s fair, but telling people what they should prefer is a bad way of doing business

The proper solution would be to have the farmers pay for the externalities somehow so that they are priced into the decision to consume a-seasonal products

13h agoHN ↗

Lastly, the US has got to start eating seasonally.

No thanks

18h agoHN ↗

If only there was an article to explain it.

19h agoHN ↗

When you read lines like "California’s extensive network of canals and aqueducts is the lifeblood of the state, providing clean water to populous cities and expansive farms that wouldn’t otherwise have it." you have to ask how we ended up with these canal systems, what the tradeoffs are in a landscape setup this way rather than one where water infiltrates the ground and stays hydrated, and who owns water rights in California.

Build Soil has some interesting threads on this:

- https://bsky.app/profile/buildsoil.bsky.social/post/3lmeddjd...

- https://bsky.app/profile/buildsoil.bsky.social/post/3mkzybkk...

(note: I'm not trying to totally bash the solar panel project nor some of the key figures involved who've done great work like Dustin Mulvaney, but do think we should think about how we ended up here)

19h agoHN ↗

I thought this was a pretty awesome video to provide the lore on how water got to Southern California. Growing up in Pasadena I heard the name Mulholland and Eaton (as in canyon) all the time but never realized they were so instrumental in the founding of the city and all the wild shenanigans that went into getting the water from up north to LA.

https://www.youtube.com/watch?v=x-RGL15Skuo

19h agoHN ↗

There's also a practical engineering video on it: The Los Angeles Aqueduct is Wild https://www.youtube.com/watch?v=PhW2BjFQCZM ( https://practical.engineering/blog/2026/3/17/the-los-angeles... for blog post transcript)

In searching YouTube history for it, I see I also stumbled across this project too: Why Aqueduct Solar Solves 2 MASSIVE Problems https://youtu.be/EVBacmPfQ6E (about 9 minutes in it gets into the engineering challenges mentioned else comment about wind loads and such).

17h agoHN ↗

What I'm trying to gesture at isnt engineering prowess though but better questions around how California changed over the past 100ish years and the issues around land-use change and relationship to water. See things like what Yasha Levine has done such as:

- Pistachio Wars film - https://pistachiowars.com which talks about the changes in water use and canal development

- the original article 'A Journey through Oligarch Valley' from 2013: https://web.archive.org/web/20151115054847/https://www.nsfwc...

14h agoHN ↗

The PE video gets into that history from the start...

    On November 5, 1913, tens of thousands of people climbed these hills to watch the first water arrive. When the gates finally opened, water trickled through, but that trickle quickly became a torrent. The project’s chief engineer, William Mulholland, leaned over to the mayor and shouted the line that’s been repeated ever since: “There it is, Mr. Mayor. Take it!”

    That moment was profound for a lot of reasons, depending on where you live and how you feel about water rights. LA didn’t become LA by living within the limits of its local resources. Its meteoric growth into the metropolis we know was enabled by an early and extraordinary decision to reach far beyond its own watershed and pull a whole new river into town. Today, roughly a third of LA’s water comes from the Eastern Sierra through the Los Angeles Aqueduct system. That share swings with snowpack, drought, and environmental constraints, but this one piece of infrastructure helped turn a water-limited town into a world city. It’s one of the most impressive and controversial engineering projects in American history.

And then t'wards the end:

    But it many ways, it was not only unscrupulous, but also short-sighted. Residents of the Owens Valley watched ranchland and farmland dry up as the water that had shaped their home was rerouted south. Native communities saw their homeland transformed with access to gathering areas disrupted, places made unrecognizable, and cultural ties strained by changes they didn’t choose. Wind picked up alkaline dust from dried lakebeds. Habitats were disrupted, and the birds that depended on these waters and wetlands lost part of what made this migration corridor work. It’s easy to see why the aqueduct remains controversial, and why what we sometimes dismiss as “red tape” around major infrastructure is often completely justified due diligence. As engineers, and really, as humans, we have to try and account for costs that don’t show up on a balance sheet, but can come back later as decades of lawsuits, mitigation, and restoration.

There's some engineering in there (I don't recall this one having any garage models though). It's mostly about the relationship of politics to the engineering project.

17h agoHN ↗

Living in Pasadena/Glendale, dad living in Palmdale where we would spend weekends... I would pass by that famous section along the 5/210 split often. Was always fun to see the lights on and the roaring water coming down.

18h agoHN ↗

Back when they thought they could pay their way out of problems. Looking at you florida everglades

16h agoHN ↗

I would love to see the major cities in California start building desalinization plants.

Every plant built would give us a much needed buffer and in the good times could even let us refill ground water (we'd never do that, I know).

16h agoHN ↗

That and investing in better rainwater management -- those muddy torrents of water that pour into ocean would be much better if slowed down upstream and allowed to percolate into the aquifers.

15h agoHN ↗

You do realize that agriculture uses 80% of the (mostly free) developed and deliverable water, while urban cities use about 10%?

That's true of basically all of the West and the Colorado River, too.

14h agoHN ↗

Sure do! But people die in a few days without potable water, crops are usually more drought resistant.

And yes, I do get the point that if you suggested we build $6B desalination plants to grow lettuce people would balk and say, "That's not worth the money!". We should use less water on crops.

4h agoHN ↗

People also die in a few weeks without access to agriculture. We could be growing less water hungry crops and raising drought resistant livestock, though.

13h agoHN ↗

It's bad but one thing not often pointed out in this conversation is that about 50% of water used in irrigation for agriculture returns as groundwater. In most other cases, used water ends up in sewers or evaporating

13h agoHN ↗

Most desalination plants (at least the ones that are economically viable) focus on brackish groundwater, not ocean water. This contributes to the problem GP is pointing out. California already does more desalination than any US state other than Florida.

But there's a million environmental restoration projects we could be doing right now to increase the water holding capacities of our environments that are simply not being sufficiently funded. The science is pretty well done on most of these strategies while desalination of ocean water is still mostly an experimental technology that is not economically viable.

13h agoHN ↗

Israel is using desalination for agriculture. What's your definition of economically viable?

10h agoHN ↗

yes they are draining the dead sea. It's an environmental disaster and the loss of one of the most unique environments on earth.

I made a very clear distinction there between brackish water and ocean water.

4h agoHN ↗

Just to be clear, desalination runs off seawater.

The Dead Sea is disappearing because the freshwater that flows into it keeps getting diverted for other uses.

4h agoHN ↗

I'm afraid your are misinformed. Perhaps the biggest desalination in Israel Sorek, on the Med coastline.

They are however, in talks with Jordan about piping water into the Dead Sea, and there is a similar operation for the Galilee.

There are however various salt mining operations around Dead sea using brine. That is, both in Israel, and less extensive in Jordan.

14h agoHN ↗

you have to ask how we ended up with these canal systems, what the tradeoffs are in a landscape setup this way rather than one where water infiltrates the ground and stays hydrated

Good questions I guess but what more specifically are you saying would happen if we delete the canals? What does "the water infiltrates the ground and stays hydrated" mean?

Presumably deleting the canals means water will still be relatively scarce and the distribution will simply by different and not controlled by the state.

13h agoHN ↗

I think they're trying to point out how little effort is put into environmental restoration that would allow our environment to hold more water instead of having most of our rainwater wash out into sewers. Some of the loss in the environment's ability to hold water is due to large infrastructure projects in the first place. We are heavily draining the landscape and its causing us to lose critical topsoils (some of which took thousands of years to make).

Compared to 200 years ago, water moves around much more but California overall has MUCH less water.

13h agoHN ↗

Huh, California goes to extreme lengths to try to capture runoff?

19h agoHN ↗

Are there risks of any poisons or chemicals from the solar panels leaking into the water system over time?

18h agoHN ↗

Maybe, but ideas like that are what you all will use to eventually turn against solar and seek to ban going off grid as you see a disparity between those who can afford to buy solar and those who can't. Why's that a problem? Those who can will go off grid and those who can't will be left on a grid that they can't pay for, and it will crumble. We are already seeing the beginnings of this in California.

18h agoHN ↗

Yup, it's dropping dropping dropping. But it's still out of range for most.

15h agoHN ↗

Housing is out of range for most, but hopefully regulations will change to allow for balcony solar, which means that renters would be able to buy a tiny bit to offset their costs, and move it to their next place.

17h agoHN ↗

Off grid? That's one way to go.

  Australia is leading the world in rooftop solar adoption. By June 2025, 4.2 million rooftop solar systems had been installed nationwide  representing 26.8 gigawatts of clean power generation capacity connected directly to local electricity networks that serve homes and businesses.

   “In the evenings homes typically consume power, which flows from large power generation plants, such as wind farms, hydroelectric, coal and gas-fired power plants. Let’s call this the ‘low-tide’ time in local electricity grid operation,” he said.

  “In the middle of a sunny day, however, today about 40% of Australian homes generate their own power from rooftop solar panels. When the rooftop solar generation exceeds the power consumption in the houses, the excess power is ‘exported’, flowing back to the grid, supplying other homes and beyond. Let’s call this the ‘high-tide’ time in local electricity grid operation.”

~ https://www.csiro.au/en/news/all/articles/2025/october/ocean...

Grids are useful to balance out sources and sinks, make battery farms economical at scale. You do need smarter grids to deal with phase imbalances.

18h agoHN ↗

This hacker entered the thread thinking this was a good idea but leaves muttering “man, things are complicated.”

18h agoHN ↗

Are there any risks of mercury settling into the water system over time from coal power plants?

Are there risks of heavy metal and tire contaminates from vehicles leaking into the water system over time?

Are there risks of dust blown contamination from the megatons of shit humans leave everywhere we go leaking into the water system?

The answer is everything has risks, the risks from solar panels are unbelievably tiny in relation to all other pollution sources and I have to deal with a bunch of redneck solar panel haters that have bought in to massively overblown risks around them.

16h agoHN ↗

Risks? Hah! You don't want to worry about that. You want to worry about the municipal tire fire and the radioactive slag pit!

2h agoHN ↗

There was no binary at all. There are a lot of different things you have to look at, many not even directly related to what you're talking about.

14h agoHN ↗

No, this is a right wing talking point against solar that isn't based in fact.

13h agoHN ↗

It's definitely brought up by anti-solar crowds. It's more accurate to point out that the risk is small rather than to dismiss the genuine concern. Solar panels can actually increase water quality because they replace diesel generators according to this nature article

https://www.nature.com/articles/s41893-021-00693-8

The concern is not completely unwarranted:

Because over-canal systems are subject to a more humid environment than ground-mounted systems, over-canal PV panels might have increased reliability problems45. In tropical conditions, the water content in the encapsulant can exceed solubility, which can lead to the formation of droplets of water in the modules, sometimes causing corrosion or other problems

But overall "field experiments have shown that CdTe semiconductors can withstand hot and humid environments."

12h agoHN ↗

That article, and your quote, doesn't seem to support your pushback.

Of course, if a solar panel is broken, ground up and falls into a canal, it would put some heavy metals into the water.

The risk is basically zero and far lower than any other power generation source. It is a nonsense, bad faith "concern".

19h agoHN ↗

They don't mention Gujarat specifically, but they do mention the prior projects in India and Arizona (which your link discusses) in the article.

18h agoHN ↗

You need to credit someone for "hey lets use solar panels to shade things that would benefit from shade"?

18h agoHN ↗

>The state currently generates 62% of its electricity from renewable and zero-carbon sources, with the largest percentage of that coming from solar

62% is pretty respectable for the size of California (same electricity consumption as Spain). I did not know this.

18h agoHN ↗

and zero-carbon sources

this part of the claim is carrying a ton of weight here... Zero-carbon sources could include carbon dependent sources with paper offsets.

16h agoHN ↗

Electricity sources are tracked by the California Energy Commission, the 2024 report [0] shows the zero-carbon sources that make up this claim are:

  Nuclear     9.92%
  Large Hydro 11.06%
  Biomass     1.94%
  Geothermal  4.60%
  Small Hydro 1.52%
  Solar       21.30%
  Wind        11.89%

2% from biomass is suspect as a "zero-carbon" source, but the rest seems to be reasonably be zero carbon by today's standards.

[0] https://www.energy.ca.gov/data-reports/energy-almanac/califo...

13h agoHN ↗

Biomass is zero carbon. It pulled all the carbon it will emit from the air already. Burning it simply returns what it had already recently removed.

One can even potentially pyrolize the biomass and get biochar, giving up some energy but making it carbon negative power source.

17h agoHN ↗

Yes, I was impressed with this number as well. I wonder when we'd reach 75-80%, but I believe the zero-carbon electricity target is 2045?

14h agoHN ↗

It is impressive, but it’s also why electricity is $0.34/kWh in California

14h agoHN ↗

grid maintenance is massive but wildfire liability is a larger problem California faces more than any other state

if only California didn't ban cultural burns in the first place

14h agoHN ↗

And as of the writing of this comment, ~7pm, about 25% of CA's grid is supplied by batteries: https://www.caiso.com/todays-outlook/supply

I was shocked when I saw how much batteries contribute, honestly don't hear about them much but they have scaled a lot in recent years.

14h agoHN ↗

Amazing what California can achieve when they don't have to deal with constant cease-and-desist lawsuits, eminent domain battles, environmental review challenges, etc (crying in high speed rail)

4h agoHN ↗

…and massive subsidies for the developers at the federal level…

14h agoHN ↗

Also the 2nd highest electricity prices in the USA behind Hawaii

11h agoHN ↗

Imagine how much more expensive it would be if renewables didn't make up such a big share.

9h agoHN ↗

Probably cheaper? Renewables have a big upfront Capex usually financed.

3h agoHN ↗

Everything has a big upfront Capex. However you finance it and because renewables are cheap fuel they come out cheap in the long run.

A large part of the Capex of renewables is land costs - which are high, but once you have the land you keep it. This cost is generally all financed as part of the initial build, so in 30 years everything is paid for - but you have to finance to replace only the renewables while keeping the land and so the second round is a lot cheaper.

18h agoHN ↗

Can photovoltaics be recycled? I know they degrade over time.

18h agoHN ↗

Yes. The vast majority of a solar panel is glass and metals. Both are easily recyclable.

16h agoHN ↗

The material itself is not the problem I’m concerned about. The metal gets doped and transformed into configurations that could be hard to be unmade.

14h agoHN ↗

A 1 square meter solar panel that weighs around 10kg contains under half a kg of actual doped silicon photovoltaic cells, with the remaining >95% being mainly aluminium framing, glass to cover the cells, and some backing material and wiring, all of which are trivially recyclable. So even if the doped silicon wasn't recyclable (which it is with a little more effort than the other materials) that's hardly the majority of the material that goes into making a solar panel.

13h agoHN ↗

The solar cells are tightly glued to the glass. Glass is easily recyclable but obtaining it and cleaning it is nearly impossible. It's also treated with antimony to increase its durability which limits how you can handle it. About 90% of all glass in solar panels has been landfilled.

A minor point anyways. Glass is not exactly a precious resource.

The most valuable parts are obviously the silver (about 50% of a panel's scrap value despite being 0.1% by weight), aluminum (about 20% of value), silicon (about 15%), and copper wiring (about 10%).

We are only just beginning to figure out techniques to reclaim the silver using thermal heating and chemical leaching techniques

13h agoHN ↗

So at the moment it’s not really recyclable.

11h agoHN ↗

Still way better than the amount of concrete et. al. needed to build any traditional power plant.

18h agoHN ↗

Even though the canal is fenced in, “we have instances where we have cars go into the canal — we’ll have people go into the canal, and animals go into the canal,” Allen said, describing some of the challenges they faced as an urban water district.

“What Turlock is doing with their projects is very impressive, but we have a different-looking canal system going through our service area,” Allen said. They are looking to put their canals into pipes to avoid evaporation, instead.

Umm, if you can completely enclose it in a pipe then why in the heck couldn't you put an 8-10' tall roof over it?

Typical local government (and I worked for one): "We didn't do it that way when I got here and it sounds like a lot of work and will be a change so let's rationalize doing nothing"

16h agoHN ↗

I think it just might be that this is something that makes sense in some situations and not others.

3h agoHN ↗

roofs aren't as good at preventing evaporation as pipes, so if that is the point why roof it?

Theres a very narrow balance where canals covered in solar panels make sense.

It needs to have enough evaporation that its a problem, but not enough where it justifies piping it.

That's a very narrow market, and so unlikely to be scalable or prevalent.

Personally i don't think this makes much sense, it's not like there is no room to place solar panels, and the added costs of putting it over water makes it not as efficient. I suppose the main benefit is easy access to water for cleaning (which can then be dumped back into the canal).

15h agoHN ↗

"Sorry, you have been blocked"

Well I guess I won't be reading your article then.

The way so many web sites are now banning whole parts of the world is killing the Internet.

15h agoHN ↗

just remember to pay PGE for connecting to the grid

14h agoHN ↗

I wonder if we couldn't build solar panels also over stretches of highway.

11h agoHN ↗

The interstate highway system in the US has to straighten out every so often so that a plane can land on it. Otherwise I like the idea, except that you'd need more pylons per panel since a continuous run of panels might shade the road too much. Maybe run them in a strip over all of the existing light poles?

10h agoHN ↗

Harris said he spent a lot of his life in France, where he noticed how trees lined the canals and protected their precious water from the wind and sun

So why not plant the trees?

10h agoHN ↗

It's a bit of a challenge to get suitable trees to grow in the central California desert.

10h agoHN ↗

They used to do that in Phoenix. There were trees all along the canals. They replaced that setup with a solid uncovered concrete canal system. The issue with trees is that the roots will cause leaks in your canal.

9h agoHN ↗

Also take care to have trees close to a swimming pool, just like us, they won't say no to a free source of liquid, and many species have quite powerful roots.

Redoing swimming pools due to close by trees seems to be quite common construction work job.

4h agoHN ↗

Strange how France didn’t have this problem

4h agoHN ↗

France didn't use concrete to build it's canals.

3h agoHN ↗

it probablz does, it just has a lot more water and less sun and heat so its not as noticeable

10h agoHN ↗

In an effort to limit warming poised to dry out the state, California pledged to shift to 100% clean electricity by 2045.

Well moving to sustainable energy is good, but California being on 100% clean electricity won't have any measurable effect on its warming.

9h agoHN ↗

I guess global warming will be solved through lots of different actions and changes, even though none of them will make a measurable difference on its own.

9h agoHN ↗

Also 2045 seems like a quite late goal by now, leaving all the options open. Have they moved in that direction already and have a head start?

3h agoHN ↗

CA is already at 40% electric from green sources. I don't know their plans, but in general I would expect by 2035 they will be at 95%. However that last 5% will be the long tail of weird/hard things.

8h agoHN ↗

$20M for 1.7MW of capacity. Over $10 per watt. Recent utility scale installations in California are more like $1/W.

There'd be some cost reduction from scaling up, but 10x is a huge gap to close. This is a waste of money.

7h agoHN ↗

a $20 million state grant paid for both the research and the infrastructure.

Weimer described the project as a “proof of concept” that generates just 1.7 megawatts of energy, a tiny fraction of the 56 megawatts that they generate with a solar farm in the desert.

But the canal site hosts more than just panels. Bales said they “have instruments out there to measure temperature, relative humidity, wind speed, incoming radiation, outgoing radiation, and a prototype instrument to measure evaporation directly.”

It’s not that simple. It’s a research projects that does more than just solar.

So you need to ask “how much of the grant went into the solar-cover”, and set that up against the value produced (water evaporation, water quality, electricity, etc).

What you did is set the price of the entire research project up against one of its output.

7h agoHN ↗

It's fair to note that only some percentage of the costs went to the panels and associated infrastructure, but a research grade weather station costs like $1k. I'm sure the prototype instrument for evaporation cost more; let's say $1M. That still leaves $19M for everything else. Frankly I have a hard time believing the other stuff was anything more than a rounding error.

As for the benefits: $/w already includes the electricity generated. California loses 1-2% of water in canals to evaporation; I think we can safely assume the economic value of preventing evaporation will be negligible when bare panels cost over $5/sq ft.

I look forward to seeing the author's economic analysis in the full report. However, the fact that these were the only numbers in this fluff piece suggests the economics won't be great.

3h agoHN ↗

At 1-2% savings of water thats roughly $20M–$40M/year on 2M AF of throughput using the 2024 SWP as base reference for volumes + 1000$/AF.

Though I think saving water in drought years has a massive value that isn't properly measured in this calculation. Likewise in boom years saving water almost doesn't matter.

See what the proposals come in as. See if the politicians turn it into a jobs project for the interior...

3h agoHN ↗

I really like the idea of using this as a jobs program to keep the capacity to build, "muscle memory," strong in the workers in this community: metalworking, electrical, etc. There is much left to be built over the next 20-50 years.

The Hoover Dam was also a sort of jobs program similarly.

3h agoHN ↗

I mean the industrial policy of America is a jobs program. I think the governments en masse are trying to correct their assumptions from the 90s. Update their priors if you would.

3h agoHN ↗

So thats a pilot project - and the benefits aren't supposed to be your 1$/W its comparing the collective of all the goals for the project. So include the water savings and the cleaning costs - then comparing the two of them.

Its also not comparing against utility projects because it isn't utility scale.

7h agoHN ↗

The idea of covering irrigation canals has been around probably for thousands of years. Only recently I have seen this being done in Xinjiang in towns right next to the desert. The canals which have river water often flow under streets and through little caves and such, enabling them to grow grapes and such. The grapes are then also providing shade on paths and roads.

5h agoHN ↗

The point is to lose less water, you’re talking about leaking water into the surrounding soil.

3h agoHN ↗

No, I am talking about both. If too much water evaporated, they wouldn't have enough to water all the plants. Both ideas, preventing evaporation, and guiding the water, are very old.

5h agoHN ↗

I assume cutting a trench is far cheaper than making the massive pipes that would be needed to move that amount of water.

But I would be interested to see how a solar panel covering compares economically to some other, cheaper setup.

4h agoHN ↗

I was wondering, but "earthquakes" perhaps. It's much easier to fix a canal, even with some of the water flowing.

There's a cost to pipes, but at least part of that would be offset by the structural support for the solar panels and the fact that you need to pipe less waters. Also I assume that the canals are lined in some way. I don't know, maybe the canals are just prettier to look at?

A similar problem is plaguing the Aral sea. The Amu Darya river is being drained by ineffective and leaky canals.

4h agoHN ↗

I would be surprised if California learned anything other than how politicians and civil servants can scam more money out of the tax-payer.

3h agoHN ↗

In Venezuela, currently in an unprecedented electricity crisis with daily rationing up to six hours, 10 billion dollars supposed to replace turbines in the main dam that supplies power to the country were stolen with no accountability. With that money you could have installed solar roofs in a million homes serving five million people approximately

Solutions are easy, money exists, political will doesn't

2h agoHN ↗

Puerto Rico has this problem too and that's US territory. Not as bad for sure. But it has expensive fossil fuel power generation and unreliable infrastructure. It's screaming out for renewable energy.

The key to all this though is that fossil fuels exist to induce demand for weapons. Once you realize that it all makes (depressing) sense.

19m agoHN ↗

Puerto Rico should be turned into a national park and everyone offered incentives to migrate to the mainland. Needed investment is enormous (not just for energy transformation to low carbon generation and storage, but also their water infrastructure) and the population will only continue to decline into the future.

Citations:

https://ourworldindata.org/profile/population-demography/pue...

https://apnews.com/article/puerto-rico-trump-us-solar-energy...

https://apnews.com/article/puerto-rico-blackout-power-outage...

https://welcome.topuertorico.org/stories/water-crisis.shtml

https://www.accuweather.com/en/climate/what-you-need-to-know...

37m agoHN ↗

Isn't this missing a major seeking point of the scheme? I'm pretty sure I've read about this, and putting the panels over water makes them run colder, which makes them marginally more efficient than if they were in a field. Good for the water AND the panels.

10m agoHN ↗

.. panels over water makes them run colder ..

Is the suggestion here that there is some heat transfer from the panels to the water? If so doesn't that introduce a different sort of problem?

17m agoHN ↗

Ok this economically good. But what about small fishes, frog and other small life forms as insects ? No light no (or at least few) food for these (annoying ?) creatures.