Willett Kempton
@willett.bsky.social
2.1K followers 66 following 98 posts
I research, publish, mentor & advise on offshore wind power, electric vehicles #EV, and vehicle-to-grid power #V2G. Prof at U of Delaware. #energytransition #energysky 🔌💡 🔌🚗
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willett.bsky.social
That solves for the big BTM devices. Sure, also good to have access to premises smart meter. But we didn’t need that access for home solar (done with RECs+NEM), and I think we won’t need it for #V2G nor BTM home batteries.
willett.bsky.social
Thanks, helpful link. We have successfully carved the turkey at different joints within 2222. Premises meter for kWh energy and TOD transactions at 1-h time resolution, settled with EDC via bill. Device meter for RTO A/S & capacity at 1-sec resolution, settled from RTO via aggregator. Running now.
willett.bsky.social
Hi @jigarshahdc.bsky.social Our UD #EV group is now running EVs in PJM A/S markets; entering PJM Capacity market seems blocked by their market requirement to also sell energy (impossible for batteries), not blocked by data release problems. Clarify, who should release what data?
Reposted by Willett Kempton
jael.bsky.social
Scoop: Trump lost the legal battle over halting the offshore Revolution Wind project after Orsted, its developer, brought reams of evidence to court alleging the government was lying about military security concerns.

It’s a sign truth can empower companies Trump targets.

Via @heatmap.news
How Trump’s Case Against Revolution Wind Fell Apart
The administration argued in the name of national defense — but Orsted had receipts.
heatmap.news
willett.bsky.social
Are US Administration worries about #offshorewind valid? South Fork Wind now has a year’s operating experience, Orsted has released a report on it, and @justingerdes.bsky.social has a quick-read summary—a factual, data-based alternative to today’s government propaganda.
Trump claims offshore wind is worthless. This project proves the opposite is true.
South Fork Wind, the U.S.’ first commercial-scale offshore wind farm, is demonstrating the folly of the Trump’s administration’s misguided war on offshore wind.
www.quittingcarbonmedia.com
willett.bsky.social
Incisive article “Power Struggle” by @jefftheyoung.bsky.social on how US policy drives investment, factories and jobs out of USA, favoring China. Quote (below) by @billmckibben.bsky.social if US blocks new expanding technologies, it could become the Colonial Williamsburg of internal combustion.
Quotation by Bill McKibben in “Power Struggle” Newsweek article.
willett.bsky.social
How fast can the world install 1GW of solar? Below graph 2004=1 year, up to 2023=1 day!
As of 2025, 11.5 hours—see ember-energy.org/latest-updat...
For explanation, see McKibben books.apple.com/us/book/here...
(Similar acceleration seen for wind, next storage.) Growth now unstoppable!
willett.bsky.social
US Rep Seth Magaziner bsky.app/profile/mag... asks Mr. Suess, Acting Ast Sec at DOI, why halt Revolution Wind for redundant US Gov. review? Why raise energy prices, put US workers on unemployment & kill new domestic energy? No answer: youtu.be/IWpW000opLU

Also WSJ: www.wsj.com/us-news/...
Representative Seth Magaziner (@magaziner.house.gov)
Proud to fight for working people as the Representative for Rhode Island's Second Congressional District.
bsky.app
willett.bsky.social
Even the US Chamber🎩is: “…concerned… halt work orders on offshore wind projects that already have permits, some… far along in construction… risks raising the cost of electricity… America needs every possible electron it can get, from any source,”💸
We Need Permitting Certainty...from Start to Finish
The U.S. Chamber urges the need for permitting reform as well as the importance of providing certainty for energy projects already permitted.
www.uschamber.com
willett.bsky.social
From @slashklc.bsky.social , a very plausible explanation of why US Admin vehemently opposes some low-carbon energy technologies and neutral or mildly positive on others.
Q: How to determine what is opposed? Look at current deployment sizes and growth rates.
A: #solar and #windpower
slashklc.bsky.social
Their antipathy appears limited to the technologies that pose a near-term threat to an unnecessary gas expansion. Existing hydro has mostly already been uprated. SMR, conventional nuke, new hydro, marine kinetic energy sources will all take years to develop. Wind, solar, storage — not so much.
justingerdes.bsky.social
This announcement today from DOE affirms something that came up time and again at the POET/UMERC marine energy conference I attended last week. At least so far, Trump's antipathy for renewables has not been directed at hydropower and marine energy: www.energy.gov/eere/article... 🔌💡
willett.bsky.social
I’m Willett @ U Delaware, leading research, development, & policy on #offshorewind & #EV, latter including #V2G (using batteries in EVs to make the grid more reliable & renewables-efficient).

Practice sequence:
find-huge-gap➡️research➡️ prototype➡️standards&enabling-law➡️educate-companies➡️better-world
W. Kempton holding one module of an EV battery pack, in EV lab Part of UDelaware EV R&D team, in front of V2G capable EV. W. Kempton on boat in front of offshore wind project in Denmark. Vineyard Wind single turbine deployment (GE 13MW) out of New Bedford, Mass., using feeder-barge method with motion stabilizers.
willett.bsky.social
🇺🇸Admin told Feds🫵favor energy produced using less land even if more$$ 😵‍💫. See great analysis by @mzjacobson.bsky.social; my refinements: corn🌽ethanol is not production, and space between turbines is not “used” (2nd link, tbl S28). Result:
Fossil+nuc 1.6% land
Renewables 0.16%

So💨☀️🟰 ⬇️$ and ⬇️land!
mzjacobson.bsky.social
New analysis: 100% WindWaterSolar across all US energy sectors will occupy ~56% less land than current energy:

Fossils+nuc 1.16% of US land
Corn for ethanol: 1.24%
Total: 2.4%

web.stanford.edu/group/efmh/j...

100% WWS only ~1.06% of US land for new installs

web.stanford.edu/group/efmh/j...
web.stanford.edu
willett.bsky.social
Largest offshore wind project worldwide, Berwick Bank, 4.1 GW, approved contingent on avian study & mitigation if needed. How big 4.1 GW for Scotland? 🟰 power of 2x households OR 🟰 to taking ALL cars of the road. Running well before 2030.
BBC: bbc.com/news/article...
Dev: www.berwickbank.com
willett.bsky.social
I agree that output is a better measure of effect or value. My prior message answered your why: It’s business advantage in competitive markets, not some secret. Also, I gave you links to data on many projects. The information is out there but you don’t seem to want to do the work to find or read it.
willett.bsky.social
You asked for a number, I gave you it, told you I’ve calculated it and it’s in textbooks. You replied saying it is fabricated and showed you don’t understand it anyway. So a waste of my time to be helpful. Parting advice:if you build things based on ideology rather than engineering, they fall apart.
willett.bsky.social
U.S. mid-latitudes, installed capacity factors average 18% for solar, 30% for land-based wind, and 50% for offshore wind. That’s ± for equipment variants and local climatology. I’ve calculated these and reviewed with other analysts many times. They’re in intro textbooks. Don’t need to “find out”.
willett.bsky.social
This thread, and the cited IEA Report, are based on measurements, experience, and expert review. You responded with unsupported qualitative claims from political blogs, quantitatively wrong plus ridiculous given > $1 Trillion invested this year. Try posting in a political thread for more reactions.
willett.bsky.social
World energy investments. #Grid, #solar, and #wind dwarf all others—in $/year or in (not shown) new MWh/yr. Seems the current US Admin. missed this trend, and believes that blocking growing technologies in one country will change the many market drivers of their growth. 🔌 www.iea.org/reports/worl...
Reposted by Willett Kempton
jeffstjohn.bsky.social
Senate Republicans are pushing a tax cut bill that would undermine billions of dollars of clean energy investment, kill jobs, drive up energy prices and add a new 'tax' on solar and wind so ugly that the U.S. Chamber of Commerce and Elon Musk oppose it:
www.canarymedia.com/articles/cle...
#energysky
New Senate GOP bill would kill clean power and spike energy costs
Under pressure from Trump, Senate Republicans unveiled legislation so restrictive that even Elon Musk and the Chamber of Commerce’s policy chief oppose it.
www.canarymedia.com
Reposted by Willett Kempton
jessedjenkins.com
The Senate version of GOP's budget bill dropped in the middle of the night. Astonishingly, it got EVEN WORSE. It raises energy costs, kills $100s of billions of investment in manufacturing, makes grids less reliable, increases pollution & constrains our ability to compete w/China on AI. Loser stuff.
willett.bsky.social
First text is from my in-law, a capable #mariner. #Weather forecasts appear to be the same, but suddenly way less accurate. 2nd from meteorologist colleagues on how specific staff cuts degrade forecast accuracy. One of many ways the national infrastructure we rely on is being silently destroyed.
Report on navigating with current weather forecasts
Reposted by Willett Kempton
kesma.wtf
This is giving me chills. Read it carefully. The math. chaos we’re adding into the climate is wiping insects off the planet. Even insects likely won’t be able to evolve fast enough to keep up. I’m scared to think about more complex organisms in the food chains.

www.theguardian.com/environment/...
‘Half the tree of life’: ecologists’ horror as nature reserves are emptied of insects
A new point in history has been reached, entomologists say, as climate-led species’ collapse moves up the food chain even in supposedly protected regions free of pesticides
www.theguardian.com