Magenta solar panels may be agrivoltaics' cleverest trick yet
anthropocenemagazine.org
anthropocenemagazine.org
Most flowers in 7b don't want extreme sun. We use shade cloth frequently, so solar coverage would be fine and of course have the energy co-production. Cut flowers aren't harvested mechanically at our scale, so we wouldn't have to worry about tractor access.
Meanwhile, more and more food is produced under cover for a lot of good reasons. Polytunnels, glass houses. You might get some summer shade from solar but what about season extension at the beginning of spring/end of fall? Depending on your crop and location, that could mean 4-8 extra weeks a year. What if you do geothermal energy generation for the tunnel? Now you can grow through the winter and not need the same footprint as solar. That's more appealing to me.
Anyway, I'm forever mad at corn ethanol and we should at least replace all that with solar farms. That's probably the right place to start. But also, again, zoning...
I've done hobbyist exotic (legal!) mushroom farming for a while, at a scale that is more than I could use but not like 100x what I could use. I've thought about selling but it seems like a lot of hassle doing the marketing and business parts of it.
How do you sell? Do you have a distributor that purchases product from you or is it a farmers market type deal?
(Disclaimer: I know nothing about farming)
I somewhat agree - dumping pesticides and fertilizer into the ground every year and then letting it pollute rivers is low-key insanity. But then you look at just how much farmland is out there and realize some crops just can't be put indoors, probably ever.
There are lots of variables for sure, but I do wonder how much more efficient indoor growing must get to overcome outdoor growing? Land value is vastly different between regions, so does labour, crop type, etc.
p.s. Tom Scotts recent video on strawberries was amazing - special mites to fend off other bugs and UVC light sanitizing was a bit of wow for me.
They aren’t talking about growing wheat indoors, and when they talk about tunnels it’s a bed crop in a field with plastic over it like you’d see over a box in the city.
Indoor growing has some cool stuff going for it, but you’re not going to grow row crops that we currently harvest headers wider than your greenhouse.
You’re also unlikely to put those under solar, if you’re going to do solar on that patch, it’s probably not worth farming a crop that produces 1000$ per acre under it when the solar is going to be producing way more than that.
My area averages about 175 bushels/acre for trash soil and closes in on 250/acre for prime River bottoms.
$1125 an acre without expenses is what you can expect in a GREAT year. But that's every year and it's insured against crop failure. The last years that we farmed, about 70% of our gross went to expenses. So figure about $450/acre in profit (mostly to pay for my house and food and what not).
Can electricity compete with that? I genuinely do not know.
Something around 2500W of solar can provide enough energy to drive an EV 12,000 miles a year.
When it comes to zoning. The state should require offices to install chargers for employees cars when the solar share of electricity generation is highest.
An old XKCD what if: https://what-if.xkcd.com/128/
> What in my pocket actually contains more energy, my Zippo or my smartphone? What would be the best way of getting the energy from one to the other? And since I am already feeling like Bilbo in this one, is there anything else in my pocket that would have unexpected amounts of stored energy?
Which in part had:
> A container of butane the size of a phone battery could, in principle, power the phone about 13 times longer than the battery itself could. The obvious question, then, is "why doesn't my phone run on propane?"
...
Also http://www.jefflewis.net/blog/2012/01/how_much_gas_to_charge...
And while that's based on a study from Exon (no longer accessible)... but the math part is math no matter who does the math.
> So, the claim that there's enough energy in a gallon of gas to charge an iPhone every day for 20 years seems pretty reasonable (in reality, when you look at the efficiencies, you won't be able to put all that energy into charging the phone).
> An iPhone may not be huge, but 20 years is a pretty long time. It really just goes to show how much energy gasoline contains, and why it's so useful for powering vehicles.
https://ourworldindata.org/battery-price-decline
The price of battery storage is dropping exponentially, just as the price of solar power has. Eventually, the price becomes pretty trivial.
> The price of battery storage is dropping exponentially
We're at the flat end of things. Even if this trend continues, there won't be another 99% reduction coming.
> Eventually, the price becomes pretty trivial.
Only if you can scale manufacturing and materials the same way. Hopefully not with Lithium, because that's just not abundant enough.
Often these "solutions" introduce more problems than they solve. One example being a solar farm designed to be grazed by sheep where the panels are so low to the ground that farmers can't bring in tractors and cut hay when the ruminants are gone for a season.
The best solution is still to put solar panels and farmland in different places where each can be optimized without concern for the other.
There's significant evidence "add solar panels" is an optimization to at least some kinds of farmland.
> farmers can't bring in tractors and cut hay when the ruminants are gone for a season
That season is typically "winter", and you wind up without much hay to cut at that point.
No one's banning hay fields. You can do both.
https://www.canarymedia.com/articles/food-and-farms/wheres-t...
"The solar canopy also protects the grasses, keeping them green and dewy, even as nearby fields blanch and crisp in the sunlight. Shallanberger rotates the herd every few days, a key tenet of regenerative farming philosophy, so they munch on fresh grass while the rest of the field grows back. They move through all 15 paddocks in about 45 days; if the site relied on mechanical mowers, they’d trim every 45 days, too."
"Vegetation management is one of the most significant costs for solar plant maintenance in the Southeast, Shallenberger said. In the first six months, the cattle took care of about 75% of the mowing — he had to bring in conventional equipment for some woody weeds that the cattle don’t care for. Once the pasture is more established, the herd could handle up to 95% of the site’s mowing needs."
> Reasons like this are why this type of tech will always be popular on HN but they just can't figure out why farmers don't want it.
Farmers come in different sizes, shapes, locations.
The largest https://en.wikipedia.org/wiki/Cattle_station is several times the size of the state of Rhode Island, and chances are there're some spots where a bit of shade is welcome. I can also assure you no one's mowing/haying that size a property.
What do you think "trim" is here, and why do you think anyone would do it?
How much do you think a hay field would grow in six weeks?
Nor are farmers immune to the "vote against your own interests" political bullshit that often comes up around renewables. Look at how many voted for the guy who started a trade war as a thank you.
(Plenty of bakers here, by the way. I used a literal ton of flour during COVID keeping the neighborhood supplied with sourdough. And I give hay to horses ~5x a week; I've seen what animals can do to a grassy field.)
If that's the case, then I suggest you work on that and broaden your life experiences.
As much as I want solar everywhere - it far from a sure thing for making/saving money.
they also have to be able to get "bumped" by a brush hog, plow, and whatever else without collapsing and taking down a bunch of panels.
The source can be attacked, the transmission infra can be attacked, the delivery point can be censored.
I think most people want highly distributed, reliable, affordable power. That's why off-grid tech is experiencing such a boom.
I live in a 36' skoolie, so I'm nomad-indexed, but I can confirm that over the past 10 years or so, most RV-lifers have transitioned their focus from recreation / comfort to off-grid experimentation. Essentially everywhere I go in the US, if I'm camped near others, they are going to have minimum viability for boondocking. That was not the case when I started.
Especially amidst the current political instability and apparent looming collapse of the US state, one of the simplest things that most of us can do is stabilize off-grid power in our neighborhoods, and that is quietly happening all over the place.
So, the role of vertically integrated solar (both literally and metaphorically) has more to do with the grid shape that serves our stability needs, and less to do with large-scale differences in efficiency.
Can you elaborate, please? What exactly has changed, and over what time period?
The big changes seem to have been:
* Better / more varied solar panels
* Lithium batteries (which I don't use for a house bank, but still benefit from by dint of them having driven the price deep-cycle lead batteries down)
* USB-C everything
When I first started this lifestyle, almost everyone had lead-acid batteries powering an inverter, and a zillion wall warts converting power back to DC. Some people had solar for sure, but a solid majority only camped where they were able to plug in.
At festivals, powered sites sold out quickly and at a premium. Dispersed camping in national forests was the purview of tent campers, truck campers, and people who don't use much power (ie, not a ton of remote workers). New campgrounds always focused on power pedestals and seemed to regard that as the MVP.
Now, festivals are a sea of solar and/or off-grid-cooled beers. Campgrounds are often a de-facto swap meet of usb-c oddities (I have a USB-C coffee grinder - what a world!). Dispersed camping in national forests are often transient standing desk communities. Nary an inverter in sight - everything is direct-to-USB-C.
The difference between most people needing to plug in within a few hours in order to have their basic comforts vs. being able to live indefinitely without the grid has significantly changed what it feels like to be on the road.
Who cares? One isolated field of solar represents a negligible amount of power at grid scale. Nobody is going to bother to go around attacking each individual field because the "ROI" of attacking a high-voltage transmission line (the kind that brings power from multiple thermal plants to a city) is so much higher.
Just take a look at the multiple fridge freezer attacks in the EU this year.
Maybe I was unclear: that's exactly my point! That's the problem with grid scale for most everyday uses.
In 2026, it's fairly trivial to have a setup such that, if "the grid" fails, I don't even notice for days. That's a nice feature! And it makes sense to build out communities that way from now on.
"The grid" is great for industry, but for residential, micro-grids are clearly the future. Allowing the state and the electric company to cut us off - intentionally or otherwise, let alone having no power during a disaster when it's needed most, is a very silly thing to trade for a tiny efficiency increase.
I sleep well at night knowing I have four bigass AGMs under me.
Tiny deployments of off-grid solar beat the pants off that model.
How many tiny off-grid solar deployments are required to power the people and industries of a small city of two million?
Many acres of grain are required to feed such a city, why not many fields of solar panels, community batteries (roughly one per 1-2 hundred houses), smart grids, etc.
Cool, cool.
So what do you run the engine on? How many single points of failure?
The real world however, a farmer owns a specific plot of land, has $w of capital in the back, owes $x in loans, owes y tons of crop, owns z tractors and seeds. Without centralized planning, plopping down solar panels in an optimal place isn't how things work.
The real world however, a farmer owns a specific plot of land, has $w of capital in the back, owes $x in loans, owes y tons of crop, owns z tractors and seeds. Without centralized planning, plopping down solar panels in an optimal place isn't how the real world works.
is it?
But surely only certain places need to do this? for the UK, you need to make hay for the winter, assuming that your meadows flood, or are otherwise muddy. But if your in one of the more temperate areas of the southern USA, surely you don't need to do that?
The silage that you get, then, is basically like a kind of grass sauerkraut, and smells exactly like you'd expect.
That combined with "draff" - distillery mash, the spent malt from brewing "pot ale" for making whisky, and a certain amount of shredded sugar beet tends to make up the majority of winter fodder.
Draff is great because it's still fermenting slowly and generating a lot of heat, so the cows are eating hot food in the winter. It's mostly the fibrey bits of the barley malt, which we can't eat but which cows and sheep - having cellulase in at least one of their stomachs - do incredibly well on. It's absolutely no use for anything else, humans can't eat it and it doesn't really compost down. It just rots, stinks, and emits masses of carbon dioxide and methane when it does. Far better for the environment to lock all that up in a cow.
Ideally your fields don't flood because you plant crops in the autumn that stay in the ground over winter to germinate in the spring, and if they get flooded that's it, you've lost the lot.
You tend not to see soya-based or other leguminous food here very much, because it's expensive, it has to be shipped halfway round the planet, and it's ineffective - you get shitty meat that no-one wants to buy.
You need the cows to graze pasture, chew up the grass, break down all that tough cellulose and poo it out as incredibly highly refined fertiliser.
We eat, just about everywhere in the world, because there's six inches of earth, it rains sometimes, and cows and pigs shit solid gold.
Can they mow a 1,000 acres and get through ruts from feral hogs and everything else? If so, then that's awesome (i really don't know) but you have to think of the scale.
this isn’t an either-or question. a farm owner may want to add some revenue with electricity generation. just like a hospital may want to cover their parking lot to offset costs.
at giant scale do these solar location choices optimize the absolutely best use of land for cheapest possible electricity generation? no. but at small scale it can make sense for these individual owners
https://electrek.co/2026/10/05/six-flags-has-installed-one-o...
March 2021: https://assets.cleanenergycouncil.org.au/documents/resources...
Watch the Australian Agrisolar CRC partners: https://www.cooperativeresearch.org.au/resources/about-the-c...
To put some numbers: ~40% of the corn grown in the US (approx. 5.4 billion bushels out of roughly 14.9 billion bushels total production) goes toward ethanol production
A 100 acre solar plant in Ohio would make well about $1m-$1.5m in revenue
Why would you increase the cost and complexity to try to increase your revenue from $1-1.5m to a massive $1-1.5m?
Or you could just lease the land to a solar operator for about $100k a year, with no expenses
It's a solution looking for a problem.
So central land use planning? Rural America won't be that Commumist -- not even by law, just look at the way it votes.
Freedom means a farmer can do whatever they want with their land
What I'm saying - these dual-use agrivoltaics are for higher-margin crops, where land is somewhat constrained.
there needs to be some way to harvest and transport electricity like you do corn or some other crop. Like an 18 wheeler size lipo that is charged up and delivered to a train of lipo cars and discharged. Then that train goes somewhere and connects to the grid and offloads all that electricity. Rinse/repeat. It's not as efficient as directly connecting ot the grid but maybe it's more feasible than waiting years for a grid connection.
The article’s biggest claim is that devoting one percent of US farmland to agrivoltaics could cover 20 percent of the country’s electricity, pointing at the Texas to Nebraska to California corridor, which is exactly where big mechanized farms are most common.
They run large equipment (combines, sprayer booms, center pivot irrigation systems[1], etc). To keep that working under panels you need tall posts, wide spans, and a layout that matches the equipment paths, which would push structural cost significantly above a ground installation. All maintenance would require a boom truck, not just a ground crew. And center pivots in particular (very common) need an entire circle cleared for the system to pivot, meaning a multi-acre span with no posts for the pivot to hit, which is simply infeasible.
That’s before accounting for pesticide spray and dust on the PVs, or the logistical burden of running PV crews through a working farm.
It’s also worth noting that the study itself was broccoli, which is hand harvested and about the best case crop for this. Even so, the broccoli took 25 extra days to mature. On a farm running multiple rotations a season that lost time has a real cost, separate from the structural costs.
This innovation has a lot more promise on smaller plots. Co-ops, market gardens, specialty crops, and the like that don’t rely on large equipment. I’d be surprised to ever see it on a large farm.
Unless we intentionally replace them with less efficient automation, it’s a hard sell.
It’s really more of a physics problem than an automation problem.
There are no universal one setup suits all solutions here.
One advantage of large scale agrisolar projects (trialled since at least 2020) is better moisture retention through shade of increased condensation drip.
It's a balancing act - you appear to have a position hard up one end of a see saw.
Something I've always absent-mindedly wondered about when agrivoltaics comes up is integrating a gantry/rail system of sorts for the farm equipment. It's definitely infeasible for many reasons, but it's fun to think about. Instead of equipment pulled by tractors, have the equipment ride above the field on rails, held up by the same poles the solar panels are on.
Also: Many plants don't want/need full sun. In fact, they adapt by varying production of a chemical called zeaxanthin throughout the day to manage the amount of energy they take in.
Partially shading crops with bifacial panels (which are semi-translucent) can be beneficial to the crops as well as producing energy.
https://farmbuy.com/1595-florina-road-katherine-nt-0850-4368...
1% of panel cost according to Gemini.
So while broccoli yields may have "held steady," it's possible they could make even more gains elsewhere where it might normally be too sunny. So leafy vegetables like spinach might be doing equivalently fine under the magenta shades in New Jersey, but might actually be even better in Texas.
> Broccoli cultivated under them grew more slowly, requiring an additional 25 days for harvest, but produced roughly the same yield. Meanwhile, these magenta sunscreens improved the microclimate below, reducing the “vapor pressure deficit”—a measure of when plants need to halt photosynthesis to avoid excessive water loss. This may have improved the plants’ efficiency in converting sunlight into plant biomass, which increased by 2.8- to 4.5-fold compared to unshaded plants.
> The shaded plants’ levels of macronutrients such as calcium, magnesium, and phosphorus were either higher than or similar to unshaded plants, while levels of some micronutrients such as iron, copper, and zinc were slightly lower.
1) extend the growing season/climate control
2) scatter direct light into bright ambient light meaning that plants aren't scorched.
"leafy" plants like pumpkins, tomatoes, cucumbers etc "wilt" when in direct sun. they go floppy to stop evaporation. THis means they don't grow as fast. If you even out that light so its not directly heating the living shit out of the leaves, they grow faster, because they have less time in stress.
https://www.anthropocenemagazine.org/2025/04/new-study-compa...
> The department has raised its corn production forecast by 234 million bushels to 16 billion bushels.
https://bioenergytimes.com/usda-raises-2026-27-us-corn-use-f...
About a third! Way more than I thought. I wonder how much of that would have to be covered in panels to get the same energy.
soil is a living thing, and varies by location. Clay, loam, sandy, etc etc. Then there is a layer of fungus that forms filaments. The roots of the plants grow into this, and then the invertebrates move shit about creating voids and pockets of nutrients.
ploughing can be disruptive to this. but more likley pumping pesticides and herbicies, along with moving the water table causes it to die off leaving only part of the biome behind.
Basically think of it like your intestines. You can live with a "clean"[1] gut, but you'll have the shits constantly, which'll make you dry and windy. Same with soil.
[1] think post antibiotic.
Example of a research paper using it: https://www.researchgate.net/publication/290224766_Investiga...
You might also be interested in https://phys.org/news/2026-11-air-holes-silicon-wafers-flat....
[1] https://en.wikipedia.org/wiki/Wavelength-division_multiplexi...
Re-greening at a profit?
Reflect back shortwave IR sunlight below the bandgap of the solar panels.
Make the solar panels "black" at longer IR wavelengths corresponding to the temperature of the panels and to IR windows in the atmosphere, to maximize emission of heat back into space.
These panels absorb that light before it gets to the plant, so it's a win-win.
Why plants are green is a mystery. There is no accepted explanation. A compelling theory is that during the first ocean oxidation event, dissolved iron started crashing out as iron oxide, which strongly absorbs the green light.
Or is the idea that there aren't now, but they could be built?
I'm just imagining that you are going to need a lot of vertical clearance for tractors, and support posts will have to be widely spaced enough that the horizontal beams supporting the panels will have to be quite strong, and that at some point this is less solar panels in a field, and more like constructing a building with solar panels on its roof.
It's hard to see how this would work well with corn, since corn is pretty tall, corn harvesters are pretty huge, and putting panels even high enough for a different set of smaller, realistic harvesters would still require supports that I can't imagine would be cost effective given all the other hurdles they would cause.
Other crops like cotton, alfalfa, and hay aren't as tall, but have the same harvesting problems.
Most harvesting efficiency gains are directly tied to GIGANTIC machines. Farming is insanely efficient and competitive. It's hard to see how smaller machines could be viable and no one would have discovered it until this tech.
I'd guess there is far more potential in grazing land (unrelated to this tech), which is already actively being developed at scale.
There are some small organic farms using a system of chained paper pots and frames to quickly fill them with soil and sow with seeds, then once they're sprouted you use a hand pulled machine that spreads the chain out while directly placing each plant into the soil automatically.
People tend to have a completely inaccurate view on this because of bad popsci, out-of-context feasibility studies from the 1950s and fiction that just leans toward the "fantasy" on that.
The reasons for this is are very simple:
1) There is no "high ground". Being in orbit does not enable you to throw things "down" for free, thats simply not how orbital dynamics work. All the impact energy you have to pay for up front, and delta-v on some orbital object is almost inevitably more expensive than the equivalent amount of explosives on the ground.
2) Anything launched from beyond earth orbit would be unusably delayed. And telegraphed.
3) The concept does not have a single selling point from a military perspective; not really faster than an ICBM, penetration is limited by newtonian physics regardless of speed and more expensive than just delivering the equivalent amount of explosives (or nuclear payload) via missile.
edit: Yes an interplanetary transport system could be weaponized. But so could the explosives currently used in mining (~tens of millions of tons per year), no one cares.
And we're not even talking about "orbital" bombardment. We're talking about a continuous stream of material at well above escape velocity, whose delta-V is already paid for. Simply redirecting a few pieces of this stream would not be more telegraphed than any other attack. By the way, are you sure the control systems of the mine owners are resilient to coercion of their executives by "legitimate" terrestrial governments? I'm not. None of your reasons are effective.
The energies are substantially more than mining explosives, with wildly different properties as far as threat detection and mitigation. To put it charitably, that's a quite silly comparison.
Edit: now that I'm thinking about it, maybe the best mitigatiom would be to extrude all the mined material into some other very high surface area shape that can't survive reentry, no matter the mass, but can survive being accelerated for the trip home. Maybe a big long truss, with the engine at one end. And then also limit the payload size.
Global annual production of platinum is 180 tons.
Since it's an almost free byproduct of copper electrorefining (>1% concentration in copper anode slime, but low annual production of ~800 tons, limiting CdTe panel production to ~100GW/year short term [1]), I don't think that mining it in space is ever gonna pay off for terrestrial panel production, because if it was priced somewhat comparably to platinum group metals you could never ever justify any demand for it (panels would be much too expensive compared to alternatives, tellurium is already a relevant cost factor for them despite being cheap-ish) => and you'd obviously use all interplanetary mining/transport capability on platinum and its ilk instead.
[1]: https://www.pv-magazine.com/2026/02/10/global-cadmium-tellur...
The layer of CdTe on a thin film PV module is extremely thin, so at current prices the cost of Te is a very small fraction of the cost of the module.
its _far_ cheaper to retrofit carparks than it is roofs. generally there is nothing under a carpark apart from tarmac. Unlike a roof which was designed for a specific weather loading (be it wind, rain or snow)
You also need to attach the panels to the roof, its generally simpler to bolt into tarmac compared to bonding to a weather proof seal.
Let the people build.
Datacenters in space are for Elon & his stock price, nothing more. Meanwhile we are not prioritizing things like this nearly enough. Solar on earth is what needs to be rolled out in a massive way, for our current energy needs and for datacenters.
Remember spacex is a public company and you can short the company at any time if you believe what you're saying. Why not profit off it?
Lookup the energy needs to grow plants, panels are like 25% efficient, you'd need to put most of it back into the LEDs to grow anything. Growing LEDs aren't your regular 5w home light bulbs, you need a lot of energy to grow plants.
This is the classic out of depth HN take
This does lead me back to the idea that to cover greenhouses with translucent panels, you would need translucent panels to have undergone a price drop comparable only with regular panels. Which is unlikely. And then you have risks like hail risks that multiply when covering greenhouses with panels. Although that might be an upside, since greenhouses in NL are actively going towards break free glass which is pretty expensive. So perhaps there is a break free translucent solar panel upgrade route that could work out. (I am sceptical, but it is a nice idea indeed. Light is a spectrum and not all light is equal in photosyntesis.)
Image: https://www.cell.com/cms/10.1016/j.xcrp.2026.103555/asset/c8...
Paper: https://www.cell.com/cell-reports-physical-science/fulltext/...