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A new report demonstrates how to power the computing boom with (mostly) clean energy.
After a year of concerted hand-wringing about the growing energy needs of data centers, a report that dropped just before the holidays proposed a solution that had been strangely absent from the discussion.
AI companies have seemingly grasped for every imaginable source of clean energy to quench their thirst for power, including pricey, left-field ideas like restarting shuttered nuclear plants. Some are foregoing climate concerns altogether and ordering up off-grid natural gas turbines. In a pithily named new analysis — “Fast, scalable, clean, and cheap enough” — the report’s authors make a compelling case for an alternative: off-grid solar microgrids.
An off-grid solar microgrid is a system with solar panels, batteries, and small gas generators that can work together to power a data center directly without connecting to the wider electricity system. It can have infinite possible configurations, such as greater or smaller numbers of solar panels, and more or less gas-generated capacity. The report models the full range of possibilities to illustrate the trade-offs in terms of emission reductions and cost.
An eclectic group of experts got together to do the research, including staffers from the payment company Stripe, a developer called Scale Microgrids, and Paces, which builds software to help renewable energy developers identify viable sites for projects. They found that an off-grid microgrid that supplied 44% of a data center’s demand from solar panels and used a natural gas generator the rest of the time would cost roughly $93 per megawatt-hour compared to about $86 for large, off-grid natural gas turbines — and it would emit nearly one million tons of CO2 less than the gas turbines. A cleaner system that produced 90% of its power from solar and batteries would cost closer to $109 per megawatt-hour, the authors found. While that’s more expensive than gas turbines, it’s significantly cheaper than repowering Three Mile Island, the fabled nuclear plant that Microsoft is bringing back online for an estimated $130 per megawatt-hour.
One challenge with solar microgrids is that they require a lot of land for solar panels. But a geospatial analysis showed that there’s more than enough available land in the U.S. southwest — primarily in West Texas — to cover estimated energy demand growth from data centers through 2030. This shouldn’t be taken as a recommendation, per se. The paper doesn’t interrogate the need for data centers or the trade-offs of building renewable power for AI training facilities versus to serve manufacturing or households. The report is just an exercise in asking whether, if these data centers are going to be developed, could they at least add as few emissions as possible? Not all hyperscalers care about climate, and those that do might still prioritize speed and scale over their net-zero commitments. But the authors argue that it’s possible to build these systems more quickly than it would be to install big gas turbines, which currently have at least three-year lead times to procure and fall under more complicated permitting regimes.
Before the New Year, I spoke with two of the authors — Zeke Hausfather from Stripe and Duncan Campbell from Scale Microgrids — about the report. Stripe doesn’t build data centers and has no plans to, but Hausfather works for a unit within the company called Stripe Climate, which has a “remit to work on impactful things,” he told me. He and his colleagues got interested in the climate dilemma of data centers, and enlisted Scale Microgrids and Paces to help investigate. Our conversation has been lightly edited for clarity.
Why weren’t off-grid solar microgrids really being considered before?
Zeke Hausfather: As AI has grown dramatically, there’s been much more demand for data centers specifically focused on training. Those data centers have a lot more relaxed requirements. Instead of serving millions of customer requests in real time, they’re running these incredibly energy intensive training models. Those don’t need to necessarily be located near where people live, and that unlocks a lot more potential for solar, because you need about 50 times more land to build a data center with off-grid solar and storage than you would to build a data center that had a grid connection.
The other change is that we’re simply running out of good grid connections. And so a lot of the conversation among data center developers has been focused on, is there a way to do this with off-grid natural gas? We think that it makes a lot more sense, particularly given the relaxed constraints of where you can build these, to go with solar and storage, gas back-up, and substantially reduce the emissions impact.
Duncan Campbell: It was funny, when Nan [Ransohoff, head of climate at Stripe] and Zeke first reached out to me, I feel like they convinced me that microgrids were a good idea, which was the first time this ever happened in my life. They were like, what do you think about off-grid solar and storage? Oh, the energy density is way off, you need a ton of land. They’re like, yeah, but you know, for training, you could put it out in the desert, it’s fine, and hyperscalers are doing crazy things right now to access this power. We just went through all these things, and by the end of the call, I was like, yeah, we should do this study. I wasn’t thinking about it this way until me, the microgrids guy, spoke to the payments company.
So it’s just kind of against conventional logic?
Campbell: Going off-grid at all is wild for a data center operator to consider, given the historical impulse was, let’s have 3x more backup generators than we need. Even the off-grid gas turbine proposals out there feel a little nuts. Then, to say solar, 1,000 acres of land, a million batteries — it’s just so unconventional, it’s almost heretical. But when you soberly assess the performance criteria and how the landscape has shifted, particularly access to the grid being problematic right now, but also different requirements for AI training and a very high willingness to pay — as we demonstrate in our reference case with the Three Mile Island restart — it makes sense.
Hausfather: We should be clear, when we talk about reliability, a data center with what we model, which is solar, batteries, and 125% capacity backup gas generators, is still probably going to achieve upwards of 99% reliability. It’s just not gonna be the 99.999% that’s traditionally been needed for serving customers with data centers. You can relax some of the requirements around that.
Can you explain how you went about investigating what it would mean for data centers to use off-grid solar microgrids?
Campbell: First we just built a pretty simple power flow model that says, if you’re in a given location, the solar panel is going to make this much power every hour of the year. And if you have a certain amount of demand and a certain amount of battery, the battery is going to charge and discharge these times to make the demand and supply match. And then when it can’t, your generators will kick on. So that model is just for a given solar-battery-generator combo in a given location. Then what we did is made a huge scenario suite in 50-megawatt increments. Now you can see, for any level of renewable-ness you want, here’s what the [levelized cost of energy] is.
Hausfather: As you approach 100%, the costs start increasing exponentially, which isn’t a new finding, but you’re essentially having to overbuild more and more solar and batteries in order to deal with those few hours of the year where you have extended periods of cloudiness. Which is why it makes a lot more sense, financially, to have a system with some gas generator use — unless you happen to be in a situation where you can actually only run your data center 90% of the time. I think that’s probably a little too heretical for anyone today, but we did include that as one of the cases.
Did you consider water use? Because when you zoom in on the Southwest, that seems like it could be a constraint.
Hausfather: We talked about water use a little bit, but it wasn’t a primary consideration. One of the reasons is that how data centers are designed has a big effect on net water use. There are a lot of designs now that are pretty low — close to zero — water use, because you’re cycling water through the system rather than using evaporative cooling as the primary approach.
What do you want the takeaway from this report to be? Should all data centers be doing this? To what extent do you think this can replace other options out there?
Hausfather: There is a land rush right now for building data centers quickly. While there’s a lot of exciting investment happening in clean, firm generation like the enhanced geothermal that Fervo is doing, none of those are going to be available at very large scales until after 2030. So if you’re building data centers right now and you don’t want to cause a ton of emissions and threaten your company’s net-zero targets or the social license for AI more broadly, this makes a lot of sense as an option. The cost premium above building a gas system is not that big.
Campbell: For me, it’s two things. I see one purpose of this white paper being to reset rules of thumb. There’s this vestigial knowledge we have that this is impossible, and no, this is totally possible. And it seems actually pretty reasonable.
The second part that I think is really radical is the gigantic scale implied by this solution. Every other solution being proposed is kind of like finding a needle in a haystack — if we find this old steel mill, we could use that interconnection to build a data center, or, you know, maybe we can get Exxon to make carbon capture work finally. If a hyperscaler just wanted to build 10 gigawatts of data centers, and wanted one plan to do it, I think this is the most compelling option. The scalability implied by this solution is a huge factor that should be considered.
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Current conditions: Yosemite could get 9 inches of snow between now and Sunday • Temperatures will rise to as high as 104 degrees Fahrenheit in Ashgabat, Turkmenistan, as Central and Southeast Asia continue to bake in a heatwave • Hail, tornadoes, and severe thunderstorms will pummel the U.S. Heartland into early next week.
It was a busy week of earnings calls for the clean energy sector, which, as a whole, saw investment dip by nearly $8 billion in the first three months of the year. Tariffs — especially as they impact the battery supply chain — as well as changes to federal policy under the new administration and electricity demand were the major themes of the week, my colleague Matthew Zeitlin wrote.
Like companies across many different sectors, inverter and battery maker Enphase, turbine manufacturer GE Vernova, Tesla, and the utility NextEra all mentioned the tariffs in their earnings reports and calls. Enphase, for one, is bracing for as much as 8% knocked off its gross margin by the third quarter, while Tesla’s highly-anticipated call managed expectations for the rest of the year, with the company citing the difficulty measuring “the impacts of global trade policy on the automotive and energy supply chains, our cost structure, and demand for durable goods and related services.” Meanwhile, on Thursday, Xcel Energy — which recently reached settlements for its role in the ignition of the most destructive wildfire in Colorado history and the largest wildfire in Texas history — reported missing first-quarter estimates and feeling the squeeze of high interest rates at a time of soaring, data-center-driven electricity demand.
The Department of Justice’s lawyers warned the Department of Transportation that its case against New York City’s congestion pricing program is likely a loser. We know this because someone mistakenly uploaded the DOJ’s memo into the court record for the Metropolitan Transportation Authority’s lawsuit challenging Transportation Secretary Sean Duffy’s actions. Whoops.
As my colleague Emily Pontecorvo reports, the leaked memo was dated before Duffy announced “he would put a moratorium on any new federal approvals for transit projects in Manhattan until the state shut down the tolling program.” But as Emily goes on to say, the memo “warns that continuing down this route could open up both the department and Duffy personally to further probes.” The New York Times adds that the DOT has since replaced the DOJ lawyers who authored the memo and plans to transfer the case to the civil division of the Justice Department in Washington.
More than 100 new cars and vehicles are expected to debut at the 2025 Shanghai Auto Show, which began on Wednesday and runs through next Friday. Of the approximately 1,300 total vehicles on display, 70% are new energy vehicles, according to Gu Chunting, the vice chairman of the Council for the Promotion of International Trade Shanghai, one of the event’s organizers.
The show is already off to an exciting start. Volkswagen is showcasing 50 new models, including three electrified concept vehicles specifically targeted at the Chinese market: the ID. Aura sedan, the ID. Evo SUV, and ID. Era three-row SUV, a hybrid with over 621 miles of range. BYD’s Denza line also premiered its Z, a luxury electric vehicle designed to compete with Tesla and Porsche. “Beauty is in the eye of the beholder, of course, but most people will find the Denza Z to be drop dead gorgeous,” Clean Technica raved.
That’s not all. The Faw Group, a Chinese state-owned car manufacturer, showed off a flying vehicle with a range of 124 miles, while fellow Chinese automaker Changan Automobile announced an autonomous flying car that reportedly already has government approval to transport passengers, per IoT World Today. France’s Le Monde was wowed by China’s innovations all around: “Gone are the days when the vast exhibition space had one hall dedicated to foreign brands and another for Chinese ones. Today, each Chinese group occupies a hall, showcasing domestic brands and leaving only some space for foreigners around the edges.”
Volkswagen
In a private ceremony Thursday night, President Trump signed an executive order to “unleash” deep-sea mining. The order — which directs the secretaries of Interior and Commerce to accelerate “the process of renewing and issuing seabed mineral exploration licenses and commercial recovery permits” for the U.S. Outer Continental Shelf and “areas beyond national jurisdiction”— is an attempt to offset China’s dominance of the critical minerals supply chain. Deep-sea mining operations harvest “nodules” that take millions of years to form and contain minerals like nickel, copper, cobalt, and manganese necessary for lithium-ion batteries for electric vehicles, among other applications. “For too long, we’ve been over reliant on foreign sources, and today this historic announcement marks a big step in the right direction to onshore these resources that are critical to national homeland security,” a senior administration official told reporters on Thursday, as reported by CNN.
Deep-sea mining is controversial due to how little we know about the ocean’s abyss, including the potential impact of large-scale mining operations on marine biodiversity and carbon sequestration. The United States has largely abstained from the deliberations of the United Nations’ International Seabed Authority, which determines whether and how to mine the seabed for critical minerals. The industrial mining of international waters, as cued up by Trump’s executive order, is opposed by “nearly all other nations,” The New York Times writes, and is “likely to provoke an outcry from America’s rivals and allies alike.”
It has already been a tragic year for wildfires, with more than 57,000 acres of Los Angeles and the surrounding hillsides burned in January. Now, AccuWeather is predicting that fires in the U.S. could “rapidly escalate” and burn up to 9 million acres total this year, well above the historic average of 7 million acres and close to the 8.9 million acres that burned in 2024.
Specifically, AccuWeather predicts an extreme fire season in the Northwest, northern Rockies, Southwest, and South Central states, particularly as late summer and fall approach. “There was plenty of rain and snow across Northern California this winter. All of that moisture has supported a lot of lush vegetation growth this spring,” AccuWeather’s lead long-range expert, Paul Pastelok, said. “That grass and brush will dry out and become potential fuel for wildfires this fall,” when any “trigger mechanism … could cause big wildfire problems.”
AccuWeather
Slate Auto, a three-year-old Jeff Bezos-backed startup, has announced an EV truck that will cost less than $20,000 after the federal tax credit and before customization. “It’s the Burger King of trucks,” writes Car and Driver, because “it’s affordable” and “lets customers ‘have it their way’ with a lengthy accessory list, including one that turns this pickup into an SUV.”
Three weeks after “Liberation Day,” Matador Resources says it’s adjusting its ambitions for the year.
America’s oil and gas industry is beginning to pull back on investments in the face of tariffs and immense oil price instability — or at least one oil and gas company is.
While oil and gas executives have been grousing about low prices and inconsistent policy to any reporter (or Federal Reserve Bank) who will listen, there’s been little actual data about how the industry is thinking about what investments to make or not make. That changed on Wednesday when the shale driller Matador Resources reported its first quarter earnings. The company said that it would drop one rig from its fleet of nine, cutting $100 million of capital costs.
“In response to recent commodity price volatility, Matador has decided to adjust its drilling and completion activity for 2025 to provide for more optionality,” the company said in its earnings release.
In February, Matador was projecting that its capital expenditures in 2025 would be between $1.4 and $1.65 billion.This week, it lowered that outlook to $1.3 to $1.55 billion. “We’re very open to and want to have reason to grow again,” Matador’s chief executive Joseph Foran said on the company’s earnings call Thursday. “This is primarily a timing matter. Is this a temporary thing on oil prices? Or is this a new world we live in?”
Mizuho Securities analyst William Janela wrote in a note to clients Thursday morning that, as the first oil exploration and production company to report its earnings this go-round, Matador would be “somewhat of a litmus test for the sector: we don't believe the market was expecting E&Ps to announce activity reductions this soon, but MTDR's update could signal more cuts to come from peers over the next few weeks.”
West Texas Intermediate crude oil prices are currently sitting at just below $63, up from around $60 in the wake of President Donald Trump’s “Liberation Day” tariff announcements. While the current price is off its lows, it’s still well short of the almost $84 a barrel crude prices were at around this time last year.
The price decline could be attributable to any number of factors — macroeconomic uncertainty due to the trade war, production hikes by foreign producers — but whatever the cause, it has made an awkward situation for the Trump administration’s energy strategy.
The iShares U.S. Oil & Gas Exploration & Production ETF, which tracks the American oil and gas exploration industry, is down 9% for the year and more than 13% since “Liberation Day,” while the rest of the market has almost recovered as the Trump administration has indicated it may ease up on some of his more drastic tariff policies.
If other drillers follow Matador’s investment slowdown, it could imperil Trump’s broader energy policy goals.
Trump has both encouraged other countries to produce more oil (and bragged about lower oil prices) while also exhorting American drillers to “drill, baby, drill,”with enticements ranging from kneecapping emissions standards to a reduced regulatory burden.
As Heatmap has written, these goals sit in conflict with each other. Energy executives told the Federal Reserve Bank of Dallas that they need oil prices ranging from $61 to $70 a barrelin order to profitably drill new wells. If prices fall further, “what would happen is ‘Delay, baby, delay,’”Wood Mackenzie analyst Fraser McKay wrote Wednesday. “We now expect global upstream development spend to fall year-on-year for the first time since 2020.”
A $65 per barrel price “dents” margins for drillers, meaning “growth capex and discretionary spend will be delayed,” McKay wrote.
Matador also announced that it had authorized $400 million worth of buybacks, and itsstock price rose some 4% on the earnings announcement, indicating that Wall Street will reward drillers who pull back on drilling and ramp up shareholder payouts.
“We’ve got the tools in the toolbox, including the share repurchase, to make Matador more value quarter by quarter,” Foran said. Rather than “blindly” pouring capital into growth, Matador would aim for a “measured pace,” he explained. “And if you mean what you say about a measured pace, that means when prices get a little lower, you take a few more moments to think about what you’re doing and don’t rush into things.”
At San Francisco Climate Week, everything is normal — until it very much isn’t.
San Francisco Climate Week started off on Monday with an existential bang. Addressing an invite-only crowd at the Exploratorium, a science museum on the city’s waterfront, former vice president and long-time climate advocate Al Gore put the significance and threat of this political moment — and what it means for the climate — in the most extreme terms possible. That is to say, he compared the current administration under President Trump to Nazi Germany.
“I understand very well why it is wrong to compare Adolf Hitler’s Third Reich to any other movement. It was uniquely evil,” Gore conceded before going on: “But there are important lessons from the history of that emergent evil.” Just as German philosophers in the aftermath of World War II found that the Nazis “attacked the very heart of the distinction between true and false,” Gore said, so too is Trump’s administration “trying to create their own preferred version of reality,” in which we can keep burning fossil fuels forever. With his voice rising and gestures increasing in vigor, Gore ended his speech on a crescendo. “We have to protect our future. And if you doubt for one moment, ever, that we as human beings have that capacity to muster sufficient political will to solve this crisis, just remember that political will is itself a renewable resource.”
The crowd went wild. Former House Speaker Nancy Pelosi took the stage and reminded the crowd that Gore has been telling us this for decades — maybe it’s time we listen. But I missed all that. Because just a few miles away, things were getting a little more in the weeds at the somewhat less exclusive venture capital-led panel entitled “The Economics of Climate Tech: Building Resilient, Scalable, and Sustainable Startups.” Here, I learned about a new iron-sodium battery chemistry and innovations in transformers for data centers, microgrids, and EV charging infrastructure.
I heard Tom Chi, founding partner of At One Ventures, utter sentences such as “parity dies because of capex inertia,” referring to the need to make clean tech not only equivalent to but cheaper than fossil-fuels on a unit economics basis. Such is the duality of climate week during the Trump administration — occasionally lofty in both its alarm and its excitement, but more often than not simply business-as-usual, interrupted by bouts of heady doom or motivational proclamations.
Some panels, like the one I moderated on the future of weather forecasting using artificial intelligence, made it a full hour without discussing Trump, tariffs, or tax credits at all. So far, that’s held true for a number of talks on how AI can be a boon to climate tech. It makes sense — the administration is excited about AI, and there’s really no indication that Trump has given any thought to either the positive or negative climate externalities of it.
But rapid data center buildout and the attendant renewables boom that it may (or may not) bring will certainly be influenced by the administration’s fluctuating policies, an issue that was briefly discussed during another panel: “AI x Energy: Gridlocked or Grid Unlocked?” Here, representatives from Softbank, Pacific Gas & Electric, and the data center builder and operator Switch touched on how market uncertainty is making it difficult to procure energy for data centers — and to figure out the cost of building a data center, period.
“There is a lot of refiguring and rereading contracts and looking at the potential exposure to things like the escalation in the cost of steel for construction projects,” Skyler Holloway of Switch said. Pinning down a price on the energy required to power data centers is also a bottleneck, Gillian Clegg, vice president of energy policy and procurement at PG&E explained. “For projects that want to connect between now and 2030, any kind of uncertainty or delay means that the generation doesn't get to the market,” Clegg said. “Maybe the load gets there first, and you have an out of balance situation.”
Everyone acknowledges that uncertainty is bad for business, and that delays related to funding, contracts, and construction can kill otherwise viable companies. But unsurprisingly, nobody here has admitted that said uncertainty might put them out of business, or even deeply in the red.Every panel I attend, I find myself wondering whether a founder or investor is finally going to raise their voice, à la Al Gore, and tell the audience that while their company’s business model is well and good, the Trump administration’s illogical antipathy towards green-coded tech and ill-conceived trade war is throwing the underlying logic — sound as it may have been just a year ago — into disarray.
None of the seven energy, food, and agricultural startups that presented at the nonprofit climate investor Elemental Impact’s main show, for instance, discussed the impacts of the administration’s policies on their businesses. Rather, they maintained a consistently upbeat tone as they described the promise of their concepts — which ranged from harnessing ocean energy to developing plant-based fertilizers to using robotics for electronics recycling — and the momentum building behind them. Nuclear and geothermal companies, seemingly poised to be the clean tech winners of Chris Wright’s Department of Energy, have been especially optimistic this week.
But really, what else can climate tech companies and investors be expected to do right now besides, well, rise and grind? It’s not like anybody has answers as to what’s coming down the policy pike. In a number of more casual conversations this week, a common sentiment I heard was that it’s not necessarily a bad time to be an early-stage startup — keep your head down, focus on research and prototyping, and reassess the political environment when you’re ready to build a pilot or demonstration plant. As for later-stage companies and venture capital firms, they’re likely working to ensure that their business models and portfolios really aren’t dependent on government subsidies, grants, or policies — as they keep assuring me is the case.
Even that might not be enough these days though. Chi said he’s always tailored his investments with At One Ventures towards companies that are viable based on unit economics alone, no subsidies and no green premium. So he wasn’t initially worried about his portfolio when Trump was elected. “None of our business models were invalidated by the election,” he said. “The only way that we could be in trouble is if they mess it up so bad that it ruins all of business, not just climate …”
Oops.
If there’s one dictum that I would expect to hold, though, it’s that the startups that make it through this period will likely be around for the long haul. I’ve been hearing that sentiment since the election, and Mona ElNagger, a partner at Valo Ventures, echoed it once again this week. “Microsoft and Apple were founded in the mid 1970s, which was a time of severe recession and stagflation. Amazon started at the tail end of a big recession in the early 1990s,” ElNagger reminded the audience at the Economics of Climate Tech panel, which she moderated. “Companies that survive and actually thrive in such periods share a common thread of resilience.”
As that panel wrapped up, things got existential once more as Chi’s talk moved from describing his investment thesis to the moment at large. “This time period in history is going to bring us tragedy after tragedy, and it’s really that moment that we’re going to understand the deep underlying structure of half of the world that we’ve built, and also the character of who we are,” Chi told the audience. It was unclear whether we were even talking about climate tech anymore. Chi continued, “It’s in that time period that we are going to step up and become whatever we are meant to be or not at all.”
The crowd sat there, a little stunned. Were we, in this very moment, becoming who we were meant to be? I took a bite of my free sushi as the networking and hobnobbing began.