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The end has been coming for a while. With the EPA’s new power plant emissions rules, though, it’s gotten a lot closer.

There’s no question that coal is on its way out in the U.S. In 2001, coal-fired power plants generated about 50% of U.S. electricity. Last year, they were down to about 15%.
On Thursday, however, the Biden administration arguably delivered a death blow. New carbon emission limits for coal plants establish a clear timeline by which America’s remaining coal generators must either invest in costly carbon capture equipment or close. With many of these plants already struggling to compete with cheaper renewables and natural gas, it’s not likely to be much of a choice. If the rule survives legal challenges, the nation’s coal fleet could be extinct by 2039.
Coal plant retirement presents a two-pronged problem: Utilities have to figure out how to replace lost power generation, and the surrounding community must reckon with the lost tax revenue and jobs from the power plants and the coal mines that supplied them.
From the beginning, Biden has promised to help revitalize the economies of the communities left in coal’s wake. “We’re never going to forget the men and women who dug the coal and built the nation,” he said when he laid out his energy transition plan just a week after entering office. “We’re going to do right by them.”
Economic revitalization doesn’t happen overnight, of course, or even in the span of a four-year term. But money is already rolling out in the form of targeted investments in new energy sources, businesses, and jobs in coal communities, and there’s more to come.
It’s the proactive planning aspect, however, that remains underresourced and scattershot.
Emily Grubert, a civil engineer and sociologist at the University of Notre Dame, told me there are few plants that are expected to make it past 2039 regardless, due to their age and the economics of operating them. The emissions rule’s real potential, then, is to bring about a more orderly — and potentially less painful — exit.
A Heatmap analysis of Energy Information Administration data found that of the nation’s roughly 230 remaining coal plants, 38 are scheduled to fully shut down by 2032. These plants won’t have to make any changes under the new rule. An additional five will shutter by 2039. These will be required to reduce their emissions in the interim, beginning in 2030, by replacing some of the coal they burn with natural gas. That leaves about 190 plants with either partial retirement plans or no plans at all that will be forced to make a decision between carbon capture and shutting down.
Grubert told me that many of these plants have, in fact, communicated informal plans to shut down that are not recorded in the federal data. That aside, she called it “amazing” how many have no retirement plans at all.
For surrounding communities, an impending coal transition can look really different in different places, depending on geography and how diverse the local economy is. Still, the first step should be the same everywhere. “What you need to do, really practically, is figure out what that plant is supporting,” Grubert told me. “What needs to be replaced, for whom, and by when?
It’s a lot more concrete than it seems: It’s some specific number of people, it’s some specific amount of tax revenue. It’s much easier to move forward once you actually know what those are.”
How much of that work has been done so far depends, in part, on the state. Some, like Colorado, New Mexico, and Illinois, have established new positions or entirely new offices dedicated to helping communities transition off fossil fuels. But other states, like Wyoming and Ohio, have advanced measures to keep coal plants open as long as possible.
Successful planning also depends on how clearly a retirement date is articulated and stuck to, Jeffrey Jacquet, an associate professor of rural sociology at Ohio State University who leads a multidisciplinary research project on coal communities there, told me. Some communities have been told one date and then been blindsided when a plant has been forced to shut down years earlier for economic reasons. He noted one success story in Shadyside, Ohio, where the local school board was able to negotiate a deal to slowly step down its tax collections over four years after learning the RE Burger coal plant was going to close. “Had they not weaned us off losing that tax revenue, we would have been in terrible shape,” a school board administrator told a student on Jacquet’s project. “Fiscally we’re pretty good on solid ground now, but at one point it was an extremely bleak time.”
The new power plant rule could help address some of these problems by putting the entire country on the same set timeline, forcing plant operators to put retirement dates in writing. There’s still a risk some will fail early, in unforeseen ways, but at least communities will have been put on notice.
Those who go looking for help will find ample resources. When I started looking into all of the programs that exist to bring investment into coal communities, or otherwise help them diversify their economies, I was surprised at how much investment in coal communities had already been set in motion:
This list is far from comprehensive. In fact, there are so many programs, it’s kind of a problem.
“So much of it comes down to the local capacity to take advantage of these opportunities,” Jacquet told me. “A lot of these communities are losing population, they’re facing out-migration. Community leaders are already overworked and overstressed.” (Possible case in point: I reached out to several local groups doing coal transition work in West Virginia and Kentucky for this story, and wasn’t able to get anyone on the phone.)
This isn’t a new problem, per se. The federal government had dozens of programs and pots of money set aside for rural economic development before the Biden administration came into the White House, but they were scattered across different agencies and departments within those agencies, making it difficult for any overworked, overstressed town manager to know where to start.
Jeremy Richardson, a manager of the carbon-free electricity program at the think tank RMI, told me he was involved in a group that pitched policies to the incoming president that would help ease the process. “It shouldn’t be on the community to navigate the entire federal bureaucracy to figure out what they qualify for,” he said.
Biden took the note. In his first climate executive order, he established the Interagency Working Group on Coal and Power Plant Communities and Economic Revitalization, which is building tools to help companies and local governments identify funding opportunities. Its “getting started guide,” which Richardson called a “fantastic piece of work,” walks communities and workers through 10 concrete steps, from identifying needs to developing a transition strategy to finding funding and implementing a project, with curated resources for each step. The group also established four “rapid response” teams to provide more targeted assistance to communities in areas with the highest loss of coal assets.
Jacquet summed up the group’s work as “hand holding,” stressing that it still required people at the local level that were willing and able to take advantage of these services. “I think we’re sort of seeing this phenomenon where the communities that are already best positioned to take advantage of these are going to be the ones that take advantage of it,” he said.
There are other limitations to the broader suite of federal assistance programs. For instance, even if a community is able to attract a big manufacturing project, there may be a several-years gap between the coal plant closing and the new job opportunities and local tax revenue manifesting.
That’s why the coordination efforts in states like Colorado, which was the first to establish an Office of Just Transition in 2019, are so promising. The office has a small staff of six, and a meager budget of $15 million, but is making progress by focusing on highly targeted assistance. In the town of Craig, two nearby coal-fired power plants are scheduled to retire over the next four years and four coal mines will shutter by 2030, taking with them 900 jobs and about 45% of the county’s tax revenue. A new “transition navigator” hired in January will help match the town’s needs with federal and state funding opportunities and serve as a central point of contact for coal workers and their families seeking connection to services.
“I think it’s been really helpful,” said Richardson. “They’ve had long conversations — several years of conversations — with those communities in northwest Colorado that are facing closures soon.” The office was controversial at first. Republicans called it “Orwellian” and unanimously opposed it. But in the years since, some of its staunchest critics have become its biggest champions. “To me that says that they’re doing some good work and they’re making some inroads.”
There’s progress on the energy side, too. RMI is pushing a model called “clean repowering,” enabled by a suite of IRA incentives that offer tax credits and loan guarantees for clean energy projects in fossil fuel communities. The idea is that renewable energy projects can get around the yearslong bottleneck of connecting to the grid by building in close proximity to existing fossil fuel plants. A lot of these plants have “spare” interconnection rights that a solar or wind farm could use to connect a lot sooner.
RMI found 250 gigawatts of spare rights available — which is more than the capacity of the entire existing coal fleet. “If you can build a renewable facility alongside where that fossil plant is, maybe you use the fossil plant a little less because it’s cheaper to generate from the renewables, but you know, you don’t have to close it immediately,” said Richardson.
As Daniel Raimi, a fellow at Resources for the Future, told me, even though the coal transition has been in motion for decades, it’s still early. There hasn’t been enough research. Much of the funding and programs are new. No one really knows yet what’s working, or what could work better.
The only thing that’s clear, he said, is that if these communities are going to develop alternative economic futures, they really need to begin that process now.
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Giving up on hourly matching by 2030 doesn’t mean giving up on climate ambition — necessarily.
Microsoft celebrated a “milestone achievement” earlier this year, when it announced that it had successfully matched 100% of its 2025 electricity usage with renewable energy. This past week, however, Bloomberg reported that the company was considering delaying or abandoning its next clean energy target set for 2030.
What comes after achieving 100% renewable energy, you might ask? What Microsoft did in 2025 was tally its annual energy consumption and purchase an equal amount of solar and wind power. By 2030, the company aspired to match every kilowatt it consumes with carbon-free electricity hour by hour. That means finding clean power for all the hours when the sun isn’t shining and the wind isn’t blowing.
The news that Microsoft is revisiting this goal could be read as the beginning of the end of corporate climate ambition. Microsoft has long been a pioneer on that front, setting increasingly difficult goals and then doing the groundwork to help others follow in its footsteps. Now it appears to be accepting defeat. The news comes just weeks after my colleague Robinson Meyer broke the news that the company is also pausing its industry-leading carbon removal purchasing program.
Delaying or abandoning the clean energy target — the two options presented in the Bloomberg story — represent quite different scenarios, however.
“There’s going to be a big difference between them saying, We’re going to keep trying as hard as we can to go as far as we can, but acknowledge we may not hit it, versus saying, Well, we can’t hit this extremely ambitious goal we set for ourselves, therefore we’re just giving up on the overall mission,” Wilson Ricks, a manager in Clean Air Task Force’s electricity program, told me.
The goal was always going to be difficult, if not impossible, for Microsoft to hit, Ricks said. Yes, it’s gotten tougher as Microsoft’s electricity usage has surged with the rise of artificial intelligence, and because Congress killed subsidies for clean energy as the Trump administration has done its best to stall wind and solar development. But some of the technologies likely needed to achieve the goal, such as advanced nuclear and geothermal power plants, have yet to achieve commercial deployment, let alone reach meaningful scale, and probably won’t by 2030 — especially not across all the regions that Microsoft operates in.
Nonetheless, some clean energy advocates (including Ricks) argue that keeping hourly matching as a north star is paramount because it helps put the world on the path to fully decarbonized electric grids.
Google was the first to introduce a 24/7 carbon-free energy strategy in 2020, and for a moment, it seemed that the rest of the corporate world would follow. A handful of companies joined a coalition to support the goal, but to date, I’m aware of just two — Microsoft and the data storage company Iron Mountain — that have followed Google in committing to achieving it.
Most companies approach their clean energy claims with considerably less precision. The norm is to purchase “unbundled” renewable energy certificates, tradeable vouchers that say a certain amount of renewable energy has been generated somewhere, at some point, and that the certificate owner can lay claim to it. Many simply buy enough of these RECs to cover their annual electricity usage and call themselves “powered by 100% renewable energy.”
There’s a spectrum of quality in the RECs available for purchase, but the market is flooded with cheap, relatively meaningless certificates. A company that operates in a coal-heavy region like Indiana can buy RECs from a wind farm in Texas that was built a decade ago, which won’t do anything to change the makeup of the grid in either place.
Today, the gold standard for companies with capital to throw around is instead to seek out long-term contracts directly with wind and solar developers known as power purchase agreements. That doesn’t mean the wind and solar farms send power to the companies directly. But these types of contracts are more likely to bring new projects onto the grid by providing guaranteed future revenues, helping developers secure the financing they need to build.
Microsoft started buying unbundled RECs more than a decade ago, and in 2014, it reported it had matched all of its global electricity usage. In 2016, the company began setting goals for direct procurement of renewable energy. In 2020, it pledged to achieve 100% renewable this way by 2025 — but it wasn’t going to sign just any wind or solar agreements. It aimed to pursue contracts with projects that were in the same regions as the company’s operations and that wouldn’t have been built without the company’s support. “Where and how you buy matters,” it wrote in its 2020 sustainability report. “The closer the new wind or solar farm is to your data center, the more likely it is those zero carbon electrons are powering it.”
In 2021, Microsoft upped the ante again by establishing its 2030 hourly matching target, which it referred to as “100/100/0” — 100% of electrons, 100% of the time, zero-carbon energy.
Microsoft has never publicly reported its progress toward the 2030 goal. The company’s enthusiasm for the target has also appeared to wane. In 2020, before Microsoft even made the 100/100/0 commitment, it touted a solution it developed to track and match renewable energy generation and consumption on an hourly basis. In the years since, it has led its peers in investments in round-the-clock nuclear power, even signing a 20-year power purchase agreement with Constellation Energy to bring the shuttered Three Mile Island nuclear plant in Pennsylvania back online.
But Microsoft has stopped publicizing the goal in blog posts and press releases. It went unmentioned in the recent announcement about the 2025 renewable energy achievement, for instance. And a section in the company’s annual sustainability report listing its climate targets that had previously advertised the 2030 goal as “Replacing with 100/100/0 carbon-free energy” was re-written in 2025 as “Expanding carbon-free electricity,” fuzzier rhetoric that now reads as a harbinger of a softer approach.
Microsoft did not respond to questions about its progress toward the 2030 target. In an emailed statement, a spokesperson emphasized the company’s commitment to maintaining its annual matching goal — the one achieved in 2025. No doubt that will take a lot more investment in the years to come now that the company is gobbling up a lot more electricity for data centers — some of it directly from natural gas plants.
Microsoft also shared a statement from Melanie Nakagawa, Microsoft’s chief sustainability officer, emphasizing the company’s commitment to become carbon negative. “At times we may make adjustments to our approach toward our sustainability goals,” she said. “Any adjustments we make are part of our disciplined approach—not a change in our long-term ambition.”
Even if Microsoft axes its hourly matching target, the company might have to start reporting its clean electricity usage on an hourly basis anyway. The Greenhouse Gas Protocol, a nonprofit that sets standards for how companies should calculate their emissions, is currently considering adopting an hourly accounting requirement. While the protocol’s standards are voluntary, companies almost uniformly follow them, and they will soon become mandatory in much of the world, as governments in California and Europe plan to integrate them into corporate disclosure rules.
The accounting rule change is highly controversial, with many companies arguing that it will deter them from investing in clean energy altogether, since their purchases won’t look as good on paper. “I don’t think anybody is debating having rules and guidelines around how you do more narrow matching, we should have that,” Michael Leggett, the co-founder and chief product officer for Ever.Green, a company that sells high-impact RECs, told me. “I think the debate has largely been around, is that required?”
Leggett said he could see how Microsoft’s pullback could be twisted to support either side. Proponents of the hourly accounting method will say, “Aha! See? This is why we have to require it.” Opponents will say, “See, even Microsoft can’t do it, so how are you going to require all these other companies to do it?”
I spoke to Alex Piper, the head of U.S. policy and markets at EnergyTag, a nonprofit that advocates for reforms to enable 24/7 clean energy, who saw the news as vindicating.
“What we’re seeing right now is many of the hyperscale technology companies look to the fastest path to power, and whether it is or not, some of them are turning to gas as that solution,” he told me. Piper argued that companies are choosing natural gas in part because they can get away with clean energy claims under the protocol’s existing rules. “The proposed rules for the greenhouse gas protocol would require those companies to at least be transparent.”
But Microsoft walking back its hourly matching goal does not have to mean that it’s walking back its climate ambition. It’s possible for companies to achieve significant emissions reductions by focusing their clean energy purchases on the places where wind and solar will do the most to displace fossil fuels, rather than worrying about matching every hour. For a company that operates in California, for example, supporting the addition of solar power to a coal-heavy grid — even if it’s in a different part of the country or the world — will do more, faster, than helping to build solar locally or waiting for around-the-clock resources such as geothermal power to come online.
Critics of hourly accounting argue that it doesn’t give companies credit for this kind of approach. “What I would love to have happen is anything to incentivize, recognize, and reward companies signing 20-year contracts that enable new projects coming online,” Leggett said of the Greenhouse Gas Protocol’s forthcoming rule change.
Ricks, of Clean Air Task Force, rejects the idea that an hourly accounting requirement would deter these kinds of deals. “That doesn’t mean that they can’t report any other set of numbers they want to,” he said. “Many companies do report things that aren’t currently recognized in the Greenhouse Gas Protocol.”
Microsoft is a prime example. The company includes two measures of its renewable energy usage in its annual reports: “percentage of renewable electricity,” which includes the unbundled RECs Microsoft has continued to buy over the years, and “percentage of direct renewable electricity,” which tracks power purchase agreements and the renewable portion of the grid mix where its facilities are located. The former uses the Greenhouse Gas protocol’s current accounting method, under which Microsoft says it has hit 100% every year since 2014. But the latter is the company’s own bespoke calculation.
The company’s 2025 feat was based on this made-up methodology, and it represents the first time Microsoft has announced to the world that it used 100% renewable energy. It never previously made such claims about its REC purchases, as far as I can tell. In other words, Microsoft’s standards for what it publicizes are far more rigorous than what the Greenhouse Gas Protocol requires.
Regardless of what the protocol decides, it will determine only what companies must report. It won’t prevent them from offering up their own, additional metrics of success.
PJM Interconnection has some ideas, as does the state of New Jersey.
We’ve already talked this week about Pennsylvania asking whether the modern “regulatory compact,” which grants utilities monopoly geographical franchises and regulated returns from their capital investments, is still suitable in this era of rising prices and data-center-driven load growth.
Now America’s biggest electricity market and another one of that market’s biggest states are considering far-reaching, fundamental reforms that could alter how electricity infrastructure is planned and paid for over 65 million Americans.
New Jersey Governor Mikie Sherrill anchored her 2025 campaign on electricity prices, and for good reason — in the past four years, electricity prices in the state have gone up 48%, according to Heatmap and MIT’s Electricity Price Hub, while average bills have risen from $83 per month to $130. On her first day in office, Sherrill issued two executive orders acting on that promise, directing the state to make funds available to freeze rates and declaring a state of emergency to ease the way to building more generation.
Included in that first order was a review of utility business models to be carried out by state regulators. What that review will entail is now coming into focus.
On Wednesday, the New Jersey Board of Public Utilities issued a statement announcing that it will look specifically at “whether New Jersey’s century-old utility business model — one that rewards electric distribution companies (EDCs) for capital spending even when cheaper alternatives exist — should be replaced with a framework tied to performance, affordability, and long-term cost stability.” In case anyone was still ambiguous as to what the outcome of said study might be, the board added that it is “expected to drive the most significant restructuring of utility regulation in New Jersey in decades.”
The current system, the board’s president Christine Guhl-Savoy said at a hearing Thursday, “creates a structural incentive to favor capital intensive solutions, even when lower costs, non-wires or demand side alternatives may be available.”
This structure, she said, could help explain why “over the past decade, electric delivery charges in New Jersey have risen steadily.” Within the service territory of PSEG, one of the four major New Jersey utilities, distribution charges alone have risen from $19.24 per month in January 2020 (as far back as the Heatmap-MIT data goes) to $21.84 as of April, while transmission charges have risen from around $20 to just over $29 per month. Many critics of the utility business model point to high levels of local grid spending on distribution as a way that utilities pad their earnings with returns harvested from ratepayers.
In the system regulators explored at the hearing, new projects would get a more skeptical look and ratepayers payouts would be partially determined by utilities hitting pre-defined service goals. NJBPU executive director Bob Brabston also indicated that the review process would take a close look at utilities’ regulated returns on equity — echoing his neighbor across the Delaware River, Pennsylvania Governor Josh Shapiro, who wrote in a letter to his state’s utilities earlier this week that these returns must be “transparent” and “justifiable,” and no longer be based on “educated guesses.”
“We want to make sure that the actual cost of equity and the returns on equity are close,” Brabston said Thursday. “We don’t want there to be a significant gap between the cost of equity that you all experience and the returns that the agencies that the agency awards.”
Meanwhile, in Valley Forge, Pennsylvania, the framework within which New Jersey’s utilities exist is coming in for its own examination.
PJM Interconnection — the nation’s largest electricity market, which covers not just Pennsylvania and New Jersey but also part or all of 11 other states — released an almost 70-page paper Wednesday, in which the organization’s president David Mills wrote that “the current situation is not tenable.”
PJM has been the poster child for a host of issues plaguing the electricity markets across the country, including fast-rising prices, a failure to quickly bring on new generation, and an inability to assure the market’s preferred level of reserve reliability. This set of challenges, Mills said in the paper’s introduction, “reflects something more fundamental than a design that needs recalibration.” Instead, PJM must consider “whether the foundational assumptions of the market remain valid – and if not, what a valid set of assumptions would require.”
The problem with the electricity market, he argued, can be solved by more markets. Right now, when prices shoot up, governments intervene with price caps, suppressing the market signal necessary to bring on sufficient generation that would bring down prices.
To replace that system, the paper proposes three possible models. The first, which it calls “Stabilized Markets,” would allow capacity to be procured for several years at a time outside of the current auction system, so that utilities could make sure their basic needs were covered before they go into the annual auctions. This would provide long term security for new investment.
The second path would be a more fundamental reform. This “Differential Reliability” approach would do away with the “shared reliability compact,” under which all loads must be served by the system at all times. Instead, PJM would “develop the operational and commercial framework to explicitly differentiate reliability,” incentivizing approaches like bring your own generation or curtailing power for new large sources of demand.
The third path is an “Energy Market Transition,” which might also be called the “Texas option.” Following this path, the capacity market would shrink as a portion of revenues earned by generators, and more revenue would come from real-time or near-real-time electricity sales.
While this path isn’t “full Texas” (ERCOT doesn’t have a capacity market at all), it would mean allowing for higher prices for energy in real-time, a.k.a. “scarcity pricing” which is arguably the defining feature of the ERCOT system (though even that was scaled back when prices got too high).
“The choices embedded in these paths involve genuine trade-offs, and those trade-offs affect different stakeholders uniquely,” the paper says.If PJM has learned anything in the past few years, it’s that it doesn’t get to make decisions on its own. Those stakeholders will get their say, one way or another.
Big fundraises for Nyobolt and Skeleton Technologies, plus more of the week’s biggest money moves.
Following a quiet week for new deals, the industry is back at it with a bunch of capital flowing into some of the industry’s most active areas. My colleague Alexander C. Kaufman already told you about one of the more buzzworthy announcements from data center-land in Wednesday’s AM newsletter: Wave energy startup Panthalassa raised $140 million in a round led by Peter Thiel to “perform AI inference computing at sea” using nodes powered by the ocean’s waves.
This week also saw fresh funding for more conventional data center infrastructure, as Nyobolt and Skeleton Technologies both announced later-stage rounds for data center backup power solutions. Meanwhile, it turns out Redwood Materials is not the only company bringing in significant capital for second-life EV battery systems — Moment Energy just raised $40 million to pursue a similar approach. Elsewhere, investors backed an effort to rebuild domestic magnesium production, and, in a glimmer of hope for a sector on the outs, gave a boost to green cement startup Terra CO2.
Cambridge-based startup Nyobolt has become the latest battery company to reach a $1 billion valuation, with its expansion into the data center market helping fuel excitement around its tech. Spun out of University of Cambridge research in 2019, the company develops ultra-fast-charging batteries based on a modified lithium-ion chemistry. Its core innovation is an anode made from niobium tungsten oxide, which Nyobolt says enables its batteries to charge to 80% in less than five minutes, with a cycle life that’s 10 times longer than conventional lithium-ion, all without the risk of fire.
The company has now raised a $60 Series C, following what it describes as a period of “rapid commercial momentum,” with revenue increasing five-fold year-over-year as customers in the robotics and data center industry piled in. Symbotic, an autonomous robotics company and existing customer, led the latest round. While Symbotic previously relied on supercapacitors to power its robots, Nyobolt’s says its batteries provide six times more energy capacity in a lighter package, allowing its warehouse robots to work for retailers like Walgreens, Target, and Kroger around the clock.
Now the startup is targeting data center customers too, positioning its tech as a fast-acting fix for the sudden power surges common to large-scale artificial intelligence workloads, as well as a temporary backup power solution for outages. While it has no confirmed domestic data center customers to date, it does have a nonbinding agreement with the Indian state of Rajasthan to deploy over 100 megawatts of off-grid AI data center and power management infrastructure, part of a broader push to expand its presence across the country.
Notably, the press release made no mention of plans to sell its tech to electric vehicle automakers, though this appears to have been a central focus previously. As recently as last summer, executive vice president Ramesh Narasimhan told the BBC that he hoped Nyobolt’s batteries would “transform the experience of owning an EV.” But while its tech does enable extremely fast charging, its underlying chemistry is not optimized for long-range driving. A sports car built to test the company’s batteries had just a 155 mile range. So like many of its climate tech peers, the company appears to be betting that data centers now represent a more reliable opportunity.
This week brought additional news from another European player aiming to smooth out data center power surges. Estonia-based supercapacitor startup Skeleton Technologies raised $39 million in what it describes as the first close of a pre-IPO funding round, with a U.S. listing planned for next year. Its core tech is built around a “curved graphene” structure, which the company likens to a crumpled sheet of paper with a high surface area. The graphene’s many exposed surfaces and edges allows it to hold more electric charge, which Skeleton says delivers a 72% improvement in energy density.
Like Nyobolt, Skeleton says its tech offers faster response times and longer cycle life. But supercapacitors are a fundamentally different technology than Nyobolt’s modified lithium-ion solution. Though they offer near-instantaneous response times, they store very little energy — just enough to smooth out microsecond power spikes in GPU workloads. Nyobolt’s batteries, by contrast, aim not only to smooth out data center power spikes, but also to deliver about 90 seconds of backup power in the case of an outage, before a generator or other backup source kicks in.
Skeleton is already mass-producing supercapacitors in Germany and delivering to unnamed “major U.S. hyperscalers for AI infrastructure.” It’s also making moves to expand its U.S. footprint ahead of its pending IPO, opening an engineering facility in Houston and aiming to begin domestic manufacturing of AI data center solutions in the first half of this year.
Last year brought a wave of new climate tech coalitions, with one of the most ambitious efforts known as the All Aboard Coalition. This group of venture firms is targeting the investment gap known as the missing middle, which falls between early-stage venture rounds and infrastructure funding. The model is relatively mechanical: When three or more member firms participate in a later-stage round for a company, the coalition automatically coinvests out of its own fund, matching the members’ combined contribution.
The group made its first investment in January, supporting the AI-powered geothermal exploration and development company Zanskar’s Series C round. This week, it announced its second: a $22 million commitment to low-carbon cement startup Terra CO2, bringing the company’s Series B total to $147 million. Cement production accounts for roughly 8% of global emissions, a figure Terra aims to shrink by making so-called "supplementary cementitious materials” — which can partially displace traditional cement in concrete mixes — from abundant silicate rocks. By grinding and thermally processing these rocks into a glassy powder, Terra’s product mimics the properties of conventional cement. The company says it can replace up to 50% of the cement in typical concrete mixes, lowering associated emissions by as much as 70%.
The new funding will help Terra build its first commercial-scale plant in Texas, exactly the type of first-of-a-kind project that the coalition was designed to support. But the scale of this challenge remains clear. As noted in ImpactAlpha’s coverage, the coalition has raised just $100 million toward its goal of a $300 million fund — already a relatively modest goal considering the capital intensity of novel infrastructure projects. Bloomberg previously reported that the group aimed to raise the full amount by the end of October 2025, raising questions about the willingness of LPs to bet on projects at this crucial but capital-intensive juncture.
When I think about repurposing used electric vehicle batteries for stationary storage, I think of battery recycling giant Redwood Materials, which raised a $425 million Series E in January after moving aggressively into this promising market. But while Redwood’s well-established recycling business certainly provides it with the largest pipeline of used batteries, it’s far from the only company pursuing this business model. A smaller player with a largely similar approach underscored that this week, when it announced a $40 million Series B to scale its gigafactory in Texas and expand its facilities in British Columbia.
That’s Moment Energy, which focuses on using second-life EV batteries to power commercial and industrial sites such as data centers, hospitals, and factories. Like Redwood, it relies on proprietary software to aggregate battery packs with myriad chemistries and design specs into coordinated grid-scale systems. What the company sees as its critical differentiator, however, is its safety standards. Moment has achieved UL certification, a key safety benchmark that it says others in the industry have yet to meet.
In a shot at its competitors, the company described itself in a press release as the “only provider proven capable of deploying second-life battery storage systems in the built environment without special dispensations or regulatory loopholes.” While Moment never names names, Redwood’s first commercial-scale system sits on its own private land in an open air setting, where certification is arguably unnecessary. “What most other second life [battery] companies are now trying to say is, let’s just lobby to make second life UL certification easier, because it is impossible to get UL certification, as it stands,” the company’s CEO, Edward Chiang, told TechCrunch. “But at Moment, we say that’s not true. We got it.”
As I wrote last September, it’s a good time to be a critical minerals startup, because as you may have heard, “critical minerals are the new oil.” These materials sit at the center of modern energy infrastructure — batteries, magnets, photovoltaic cells, and electrical wiring, to name just a few uses — plus their supply is concentrated in geopolitically tense regions and subject to extreme price volatility. It also certainly doesn’t hurt that the Trump administration loves them and wants to mine and refine way more of them in the U.S.
The latest beneficiary of this enthusiasm is Magrathea, which this week raised a $24 million Series A to build what it says will be the only new magnesium smelter in the U.S., in Arkansas. The company has now raised over $100 million in total, including a $28 million grant from the Department of Defense. Its approach relies on an electrolysis-based process that’s able to extract pure magnesium from seawater and brines, which it positions as a cleaner, cheaper alternative to the high-heat, emission-intensive method that China uses to produce most of the world’s magnesium today.
The U.S. military has taken note of this potential new domestic supply. Magrathea’s 2022 seed round coincided with Russia’s invasion of Ukraine, as the military looked to scale domestic defense tech supply chains. Magnesium alloys are often used to help reduce weight in EV components, a benefit equally applicable to military helicopters, drones, and next-generation fighter jets. So while these defense applications represent somewhat of a pivot from the startup’s initial focus, a greener fighter jet is still better than a dirty fighter jet.