The “food vs. fuel” debate rages on. Brilliant minds have argued for decades about whether it is wise to utilize food commodities (like corn) to produce biofuels (like ethanol). But I’d like to examine a different dimension of this issue: land use.
Credit: ©JJ GOUIN – STOCK.ADOBE.COM

A companion debate has emerged. The solar industry is increasingly confronted by criticism over the amount of land (particularly farmland) being utilized for energy generation by photovoltaics. I’ve blogged about the Land Use Implications of Energy Choices before.
In that blog, I referenced Bill Nussey (Freeing Energy author and podcaster) quite extensively. One of the other articles Bill has published in recent years was entitled: “Making Ethanol From Corn Is The Least Efficient Use Of Farmland” where he posed the question “So, what if American corn farmers replaced their fields with solar farms?”
Nationwide, about 30% of corn production goes toward ethanol production (not food, for either people nor animals). And I’d like to focus on the state of Tennessee for a comparison I’ll get to next. According to the University of Tennessee Institute of Agriculture, more than 900k acres of corn were planted in Tennessee this year. So if that 30% factor holds for Tennessee, as well, ethanol production may currently represent around 270k acres in the state.
What does that have to do with the price of tea in China?
Earlier this year (August 2023), researchers also from the University of Tennessee Institute of Agriculture released a report EVALUATING POTENTIAL LAND USE OF UTILITY-SCALE PHOTOVOLTAICS (SOLAR PANELS) ON FARMLAND IN TENNESSEE. A key result from that analysis is that if the Tennessee Valley Authority (TVA) follows through on its commitment to have 10 gigawatts (10,000 megawatts) of solar by 2035, that could occupy between 57,514 and 103,443 acres of land (0.22% to 0.39% of the state’s total land mass, or 0.53% to 0.96% of Tennessee’s farmland).1
Where I’m headed with this is that, if 10 GW solar in Tennessee requires an estimated 58k – 103k acres of land (according to the recent UT study), then we’d have more than enough land for solar if we just convert all the ethanol land over to solar — which is more efficient anyway (per Nussey’s analysis). Farmers make more (and predictable) money on solar leases. Plus, as we transition (gradually) away from gasoline automobiles, there won’t be as much of the “artificial” demand for ethanol anyway.
It turns out, I’m not the only one curious about this topic. I found this UC Davis analysis to be particularly interesting: Should Farmers Plant Solar Panels or Corn? In addition to comparing energy metrics, the author also demonstrates how sensitive the farmers’ financial returns are to electricity price.
And, of course, there’s the whole issue of ethanol subsidies (also controversial) which may be based more on politics than economics. Regardless, those subsidies certainly factor into decisions farmers make on how to utilize their land.
I welcome your feedback/reactions. You can email me at bryan@cleanenergy.org but I’ll also post this on LinkedIn and X (formerly known as Twitter) so you can consider commenting there, as well.
1 The assessment assumed all of the solar could be developed within the state of Tennessee rather than dispersed across the entire seven state region of TVA; so this is a very conservative, worst-case, scenario.
The post Food for Thought (rather than Fuel): comparing land use of ethanol versus solar appeared first on SACE | Southern Alliance for Clean Energy.
Food for Thought (rather than Fuel): comparing land use of ethanol versus solar
Renewable Energy
Nordex Outsells Vestas, GE Vernova Rebuilds Wind Team
Weather Guard Lightning Tech

Nordex Outsells Vestas, GE Vernova Rebuilds Wind Team
Nordex closes in on Vestas in onshore orders, GE Vernova rebuilds its wind team, Nexxis buys BladeBug, and wooden blades draw doubts.
The Uptime Wind Energy Podcast is brought to you by Weather Guard Lightning Tech, creators of the StrikeTape Ultra LPS retrofit. Subscribe to Uptime’s Substack newsletter. And check out Rosemary’s “Engineering with Rosie” Youtube channel. Have a question we can answer on the show? Email us!
Renewable Energy
Siemens Gamesa Builds Hornsea Blades, NEMS Invests in Perth
Weather Guard Lightning Tech

Siemens Gamesa Builds Hornsea Blades, NEMS Invests in Perth
Siemens Gamesa starts Hornsea 3 blade production in Hull, Germany approves an Offshore Wind Act amendment, and Nexxis buys BladeBUG.
The Uptime Wind Energy Podcast is brought to you by Weather Guard Lightning Tech, creators of the StrikeTape Ultra LPS retrofit. Subscribe to Uptime’s Substack newsletter. And check out Rosemary’s “Engineering with Rosie” Youtube channel. Have a question we can answer on the show? Email us!
Episode Transcript
Uptime News Flash
September 7, 2026
Happy Monday, everyone. Well, let’s talk about the biggest wind farm on earth. It doesn’t exist yet, but its blades are being built right now. Over in Hull, England, Siemens Gamesa just started making blades for Ørsted’s Hornsea 3 offshore wind farm. That’s two point nine gigawatts, one hundred and ninety-seven turbines. Each blade is longer than a football pitch. Fourteen hundred workers build blades in that factory, turning raw materials into finished product. When complete, Hornsea 3 will power more than three million British homes. It’s the single largest offshore wind farm in the world.
And if we slide over to Germany for a moment, the German cabinet just approved an amendment to the Offshore Wind Act, the WindSeeG. It’s headed to the Bundestag next. The goal? New rules by January first, twenty twenty-seven. But the Offshore Wind Energy Foundation says the draft does not go far enough. Sixteen gigawatts of awarded projects are still waiting on final investment decisions. Sixteen — that’s quite a few. The foundation wants a new way for developers to hand back sites they can’t build, so those sites can be re-tendered quickly under conditions that actually work. Sort of a use-it-or-lose-it approach. That’s the idea.
We’ll head a little further east to India. India ranks fourth in the world for installed wind power, but probably not for long. A government official said this week that India will overtake Germany and become the world’s third-largest wind energy nation by twenty thirty — one hundred seven gigawatts of installed capacity. India added a record six gigawatts last year alone, shattering their previous record of a little over four gigawatts. And twenty-eight more gigawatts are under construction right now. Impressive.
Let’s head down to Western Australia, because a company called National Electric Motor Services, NEMS for short, is building a one million dollar facility in Perth to test and repair wind turbine generators. Right now, Australian wind farm operators ship their broken generators overseas for repairs, and that takes months. NEMS is the only authorized service center for ELIN Motoren in all of Western Australia. This is the fifth project funded through Australia’s Wind Energy Manufacturing Co-investment program. Local repair, faster turnaround, and homegrown capability — that’s all good.
And staying in Australia, Perth-based Nexxis Technology just bought a British robotics company, BladeBUG. BladeBUG is a robot that uses suction cups to crawl across wind turbine blades. Nexxis already has a robot called Magneto that uses electromagnetic adhesion to climb steel structures. If you put the two together, you can inspect almost any surface on a turbine, or about anything else. Add AI and machine vision, and you have robots that can see what human eyes might miss, from places human hands shouldn’t have to reach. It’s safer, faster, and it’s going to be a lot smarter.
One more story before we finish today. Siemens Gamesa has now installed more than 300 recyclable blades in six countries. The secret is a new resin. Unlike conventional resins, this one lets you separate the blade components at end of life, so you can separate the fabric from the resin. Cool stuff. Jonas Pagh Jensen, head of sustainability at Siemens Gamesa, says the technology is ready for full-scale use. And Siemens Gamesa has already installed 36 GreenerTower units — steel towers with 63% lower carbon emissions. So although sustainability may have faded from the headlines, it’s still in tender documents, and it’s showing up more than ever. In Denmark, the Netherlands, and France, buyers are all asking about recyclability and decarbonization before they award contracts.
So what should you be watching this week? Recyclability is no longer a nice-to-have — it’s a must-have, and it’s showing up in tender scoring. If your blades can’t be recycled at end of life, you may not win the contract to begin with. And a lot of supply chains are going local. Australia doesn’t want to ship generators overseas anymore. India is building its own turbine factories. The countries buying wind power want it built at home. For professionals in the wind industry, the competitive edge is shifting — it’s not just who can build the best turbine, it’s who can build it locally, recycle it fully, and inspect it without putting a person in a harness.
Renewable Energy
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Climate “Superfund” Will Require Legislation at the Federal Level
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