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I spoke to experts about why the nascent industry is nothing like other climate solutions.
Is hydrogen really that different from an electric vehicle or a heat pump?
This is the provocative question raised by a letter sent to the U.S. Treasury Department last week by a hydrogen industry group, the latest salvo in an ongoing debate over the rules for a new tax credit for clean hydrogen that was created by the Inflation Reduction Act.
I’ve been covering this debate since December, when the public comment period for the rules first closed, and it has only grown fiercer as everyone awaits the Department’s decision. Clean hydrogen is essential to reduce emissions from fertilizer production, and likely a number of other industries, such as aviation, shipping, and steelmaking. But climate advocates and clean energy experts warn that producing hydrogen using electricity, a method incentivized by the tax credit, could actually increase greenhouse gas emissions unless the electricity comes from new wind, solar, or other carbon-free generators.
Industry groups say the opposite is true. Last week’s letter, penned by the Fuel Cell & Hydrogen Energy Association argued that this so-called “additionality” rule would “stifle the clean hydrogen market by adding unreasonable costs and delays,” thereby hurting the United States’ climate goals. The letter was signed by more than 50 companies and organizations, including Plug Power, Constellation Energy, Baker Hughes, the Chamber of Commerce, and General Motors,
When the government hands out subsidies for electric vehicles and heat pumps, it doesn’t require recipients to erect solar arrays, the letter points out. “It would be arbitrary and unfounded to presume hydrogen to have any more detrimental impact to the efforts to decarbonize than any other electric load,” it says.
On the surface, the comparison is compelling. But when I ran it by proponents of additionality, the logic broke down very quickly. And it’s worth talking about why hydrogen plants are, for a number of reasons, nothing like those other climate solutions, because the answers get to the heart of some of the risks and trade-offs of scaling up this new industry.
The Inflation Reduction Act explicitly says that hydrogen companies must meet certain emission thresholds to qualify for the tax credit, taking into account the “lifecycle greenhouse gas emissions” of production. It does not say that for electric vehicles or heat pumps.
The law establishes a tiered system, where hydrogen producers can earn more money depending on how low their emissions are. But researchers like Jesse Jenkins, a macro-scale energy systems engineer at Princeton University, have calculated that without additionality, electrolysis, an electricity-intensive method of making clean hydrogen, will induce so much new carbon pollution that it won’t even meet the minimum threshold to qualify for the credit.
That’s because when you add demand to the grid without adding any new energy supply, it’s almost guaranteed to cause a natural gas or coal plant to run more. Those are the only power plants we have right now that are capable of increasing their output to meet demand — especially at times of day when wind and solar are not available.
If companies are allowed to sign contracts with existing wind farms or nuclear power plants to qualify for the tax credit, this would simply rearrange the paperwork about who “owns” these resources. It wouldn’t change the outcome in the real world, where more coal would be shoveled into a power plant, spewing more carbon into the atmosphere. Jenkins’ lab modeled the long-term effects on energy markets and found that coal and natural gas plants that might have otherwise closed could even be kept open longer because of the increased demand for power.
“The letter does not even attempt to argue that a lack of additionality would be compatible with the emissions thresholds established by the law,” he said in an email.
Jenkins added that the law references a section of the Clean Air Act which defines “lifecycle greenhouse gas emissions” as “including direct emissions and significant indirect emissions.” (Emphasis added by Jenkins.) “This is simply the letter of the law,” he said. “Take it up with Congress!”
There’s a good reason Congress made this distinction.
Yes, the new electric load from EV charging and heat pumps will also often be met by firing up more fossil fuel power plants in the near term. However, electric vehicles and heat pumps are so much more efficient than the combustion engines and natural gas furnaces they replace, that they almost always reduce emissions regardless of where the electricity comes from.
The Department of Energy estimates that in Wyoming, for example, where more than 75% of electricity comes from coal, an electric vehicle’s annual carbon footprint would be less than half that of a gas-powered vehicle. And homeowners who replace their gas furnaces with heat pumps would reduce their emissions in at least 46 states, according to a 2020 study by the clean energy research organization RMI.
Electrolysis, on the other hand, is not more efficient than the reformation of natural gas, which is the carbon-intensive way most hydrogen is made today. Jenkins and others estimate that hydrogen plants would produce twice as many emissions as that process if they just plug into the grid, without bringing any new, clean electricity online.
Additionality proponents argue that it would be a huge mistake to subsidize the production of a fuel that does not have lower emissions than what it replaces. “If that is the final outcome,” said Jenkins, “the hydrogen subsidy will go down in history as a costly policy disaster, and the whole concept of ‘green hydrogen’ will become a farce.”
Conceptually, producing hydrogen is totally different from buying an electric car. “An electrolyser is not an end use appliance like an EV or a heat pump – it’s an intermediate step in the energy supply chain,” said Morgan Rote, director of U.S. climate policy at the Environmental Defense Fund.
Reaching this intermediate step requires so much energy that the benefits of producing hydrogen depend as much on what we use it for as how it’s made. Rote said that using hydrogen as a fuel for home heating or road transportation would require three to seven times more energy than switching to heat pumps and EVs. Many climate advocates argue that it should be reserved for applications that can’t otherwise run directly on electricity.
Danny Cullenward, a climate economist and research fellow at American University, said concerns about how hydrogen is made and used are “all the more pronounced given the extremely generous subsidy levels” in the tax credit. “Basically, [the tax credit] points a giant funnel of money at a technology that has a critical role, but one that must be carefully tailored to produce short- and long-term benefits.”
Cullenward suggested another reason the government should hold hydrogen producers to a higher standard than EV and heat pump buyers when doling out subsidies: Because it can.
“It's not unreasonable or infeasible to ask projects at the $100 million or $1 billion scale to procure clean energy,” he said. “In contrast, it would be administratively infeasible to ask homeowners to procure clean energy.”
He pointed to a recent analysis by the nonprofit Energy Innovation, which found that subjecting hydrogen producers to tight standards, like an additionality requirement, would not result in “unreasonable costs and delays” as the industry claims. By contrast, the report found that the tax credit is so generous that even with stringent emissions accounting rules like additionality, projects in many parts of the country will be able to sell their hydrogen at or below $1 per kilogram, outcompeting conventional hydrogen.
There are a lot of uncertainties about what it will take to successfully scale up clean hydrogen in the U.S., and disagreement about what the biggest near-term priorities should be.
But one thing that is clear: Clean hydrogen is a unique climate solution with specific risks and tradeoffs that can’t be ignored.
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Ecolectro, a maker of electrolyzers, has a new manufacturing deal with Re:Build.
By all outward appearances, the green hydrogen industry is in a state of arrested development. The hype cycle of project announcements stemming from Biden-era policies crashed after those policies took too long to implement. A number of high profile clean hydrogen projects have fallen apart since the start of the year, and deep uncertainty remains about whether the Trump administration will go to bat for the industry or further cripple it.
The picture may not be as bleak as it seems, however. On Wednesday, the green hydrogen startup Ecolectro, which has been quietly developing its technology for more than a decade, came out with a new plan to bring the tech to market. The company announced a partnership with Re:Build Manufacturing, a sort of manufacturing incubator that helps startups optimize their products for U.S. fabrication, to build their first units, design their assembly lines, and eventually begin producing at a commercial scale in a Re:Build-owned factory.
“It is a lot for a startup to create a massive manufacturing facility that’s going to cost hundreds of millions of dollars when they’re pre-revenue,” Jon Gordon, Ecolectro’s chief commercial officer, told me. This contract manufacturing partnership with Re:Build is “massive,” he said, because it means Ecolectro doesn’t have to take on lots of debt to scale. (The companies did not disclose the size of the contract.)
The company expects to begin producing its first electrolyzer units — devices that split water into hydrogen and oxygen using electricity — at Re:Build’s industrial design and fabrication site in Rochester, New York, later this year. If all goes well, it will move production to Re:Build’s high-volume manufacturing facility in New Kensington, Pennsylvania next year.
The number one obstacle to scaling up the production and use of cleaner hydrogen, which could help cut emissions from fertilizer, aviation, steelmaking, and other heavy industries, is the high cost of producing it. Under the Biden administration, Congress passed a suite of policies designed to kick-start the industry, including an $8 billion grant program and a lucrative new tax credit. But Biden only got a small fraction of the grant money out the door, and did not finalize the rules for claiming the tax credit until January. Now, the Trump administration is considering terminating its agreements with some of the grant recipients, and Republicans in Congress might change or kill the tax credit.
Since the start of the year, a $500 million fuel plant in upstate New York, a $400 million manufacturing facility in Michigan, and a $500 million green steel factory in Mississippi, have been cancelled or indefinitely delayed.
The outlook is particularly bad for hydrogen made from water and electricity, often called “green” hydrogen, according to a recent BloombergNEF analysis. Trump’s tariffs could increase the cost of green hydrogen by 14%, or $1 per kilogram, based on tariff announcements as of April 8. More than 70% of the clean hydrogen volumes coming online between now and 2030 are what’s known as “blue” hydrogen, made using natural gas, with carbon capture to eliminate climate pollution. “Blue hydrogen has more demand than green hydrogen, not just because it’s cheaper to produce, but also because there’s a lot less uncertainty around it,” BloombergNEF analyst Payal Kaur said during a presentation at the research firm’s recent summit in New York City. Blue hydrogen companies can take advantage of a tax credit for carbon capture, which Congress is much less likely to scrap than the hydrogen tax credit.
Gordon is intimately familiar with hydrogen’s cost impediments. He came to Ecolectro after four years as co-founder of Universal Hydrogen, a startup building hydrogen-powered planes that shut down last summer after burning through its cash and failing to raise more. By the end, Gordon had become a hydrogen skeptic, he told me. The company had customers interested in its planes, but clean hydrogen fuel was too expensive at $15 to $20 per kilogram. It needed to come in under $2.50 to compete with jet fuel. “Regional aviation customers weren’t going to spend 10 times the ticket price just to fly zero emissions,” he said. “It wasn’t clear to me, and I don’t think it was clear to our prospective investors, how the cost of hydrogen was going to be reduced.” Now, he’s convinced that Ecolectro’s new chemistry is the answer.
Ecolectro started in a lab at Cornell University, where its cofounder and chief science officer Kristina Hugar was doing her PhD research. Hugar developed a new material, a polymer “anion exchange membrane,” that had potential to significantly lower the cost of electrolyzers. Many of the companies making electrolyzers use designs that require expensive and supply-constrained metals like iridium and titanium. Hugar’s membrane makes it possible to use low-cost nickel and steel instead.
The company’s “stack,” the sandwich of an anode, membrane, and cathode that makes up the core of the electrolyzer, costs at least 50% less than the “proton exchange membrane” versions on the market today, according to Gordon. In lab tests, it has achieved more than 70% efficiency, meaning that more than 70% of the electrical energy going into the system is converted into usable chemical energy stored in hydrogen. The industry average is around 61%, according to the Department of Energy.
In addition to using cheaper materials, the company is focused on building electrolyzers that customers can install on-site to eliminate the cost of transporting the fuel. Its first customer was Liberty New York Gas, a natural gas company in Massena, New York, which installed a small, 10-kilowatt electrolyzer in a shipping container directly outside its office as part of a pilot project. Like many natural gas companies, Liberty is testing blending small amounts of hydrogen into its system — in this case, directly into the heating systems it uses in the office building — to evaluate it as an option for lowering emissions across its customer base. The equipment draws electricity from the local electric grid, which, in that region, mostly comes from low-cost hydroelectric power plants.
Taking into account the expected manufacturing cost for a commercial-scale electrolyzer, Ecolectro says that a project paying the same low price for water and power as Liberty would be able to produce hydrogen for less than $2.50 per kilogram — even without subsidies. Through its partnership with Re:Build, the company will produce electrolyzers in the 250- to 500-kilowatt range, as well as in the 1- to 5-megawatt range. It will be announcing a larger 250-kilowatt pilot project later this year, Gordon said.
All of this sounded promising, but what I really wanted to know is who Ecolectro thought its customers were going to be. Demand for clean hydrogen, or the lack thereof, is perhaps the biggest challenge the industry faces to scaling, after cost. Of the roughly 13 million to 15 million tons of clean hydrogen production announced to come online between now and 2030, companies only have offtake agreements for about 2.5 million tons, according to Kaur of BNEF. Most of those agreements are also non-binding, meaning they may not even happen.
Gordon tied companies’ struggle with offtake to their business models of building big, expensive, facilities in remote areas, meaning the hydrogen has to be transported long distances to customers. He said that when he was with Universal Hydrogen, he tried negotiating offtake agreements with some of these big projects, but they were asking customers to commit to 20-year contracts — and to figure out the delivery on their own.
“Right now, where we see the industry is that people want less hydrogen than that,” he said. “So we make it much easier for the customer to adopt by leasing them this unit. They don’t have to pay some enormous capex, and then it’s on site and it’s producing a fair amount of hydrogen for them to engage in pilot studies of blending, or refining, or whatever they’re going to use it for.”
He expects most of the demand to come from industrial customers that already use hydrogen, like fertilizer companies and refineries, that want to switch to a cleaner version of the fuel, or hydrogen-curious companies that want to experiment with blending it into their natural gas burners to reduce their emissions. Demand will also be geographically-limited to places like New York, Washington State, and Texas, that have low-cost electricity available, he said. “I think the opportunity is big, and it’s here, but only if you’re using a product like ours.”
On coal mines, Energy Star, and the EV tax credit
Current conditions: Storms continue to roll through North Texas today, where a home caught fire from a lightning strike earlier this week • Warm, dry days ahead may hinder hotshot crews’ attempts to contain the 1,500-acre Sawlog fire, burning about 40 miles west of Butte, Montana• Severe thunderstorms could move through Rome today on the first day of the papal conclave.
The International Energy Agency published its annual Global Methane Tracker report on Wednesday morning, finding that over 120 million tons of the potent greenhouse gas were emitted by oil, gas, and coal in 2024, close to the record high in 2019. In particular, the research found that coal mines were the second-largest energy sector methane emitter after oil, at 40 million tons — about equivalent to India’s annual carbon dioxide emissions. Abandoned coal mines alone emitted nearly 5 million tons of methane, more than abandoned oil and gas wells at 3 million tons.
“Coal, one of the biggest methane culprits, is still being ignored,” Sabina Assan, the methane analyst at the energy think tank Ember, said in a statement. “There are cost-effective technologies available today, so this is a low-hanging fruit of tackling methane.” Per the IEA report, about 70% of all annual methane emissions from the energy sector “could be avoided with existing technologies,” and “a significant share of abatement measures could pay for themselves within a year.” Around 35 million tons of total methane emissions from fossil fuels “could be avoided at no net cost, based on average energy prices in 2024,” the report goes on. Read the full findings here.
Opportunities to reduce methane emissions in the energy sector, 2024
IEA
The Environmental Protection Agency told staff this week that the division that oversees the Energy Star efficiency certification program for home appliances will be eliminated as part of the Trump administration’s ongoing cuts and reorganization, The Washington Post reports. The Energy Star program, which was created under President George H.W. Bush, has, in the past three decades, helped Americans save more than $500 billion in energy costs by directing them to more efficient appliances, as well as prevented an estimated 4 billion metric tons of greenhouse gas from entering the atmosphere since 1992, according to the government’s numbers. Almost 90% of Americans recognize its blue logo on sight, per The New York Times.
President Trump, however, has taken a personal interest in what he believes are poorly performing shower heads, dishwashers, and other appliances (although, as we’ve fact-checked here at Heatmap, many of his opinions on the issue are outdated or misplaced). In a letter on Tuesday, a large coalition of industry groups including the Air-Conditioning, Heating, and Refrigeration Institute, the Association of Home Appliance Manufacturers, and the U.S. Chamber of Commerce wrote to EPA Administrator Lee Zeldin in defense of Energy Star, arguing it is “an example of an effective non-regulatory program and partnership between the government and the private sector. Eliminating it will not serve the American people.”
House Speaker Mike Johnson suggested that the electric vehicle tax credit may be on its last legs, according to an interview he gave Bloomberg on Tuesday. “I think there is a better chance we kill it than save it,” Johnson said. “But we’ll see how it comes out.” He estimated that House Republicans would reveal their plan for the tax credits later this week. Still, as Bloomberg notes, a potential hangup may be that “many EV factories have been built or are under construction in GOP districts.”
As we’ve covered at Heatmap, President Trump flirted with ending the $7,500 tax credit for EVs throughout his campaign, a move that would mark “a significant setback to the American auto industry’s attempts to make the transition to electric vehicles,” my colleague Robinson Meyer writes. That holds true for all EV makers, including Tesla, the world’s most valuable auto company. However, its CEO, Elon Musk — who holds an influential position within the government — has said he supports the end of the tax credit “because Tesla has more experience building EVs than any other company, [and] it would suffer least from the subsidy’s disappearance.”
Constellation Energy Corp. held its quarterly earnings call on Tuesday, announcing that its operating revenue rose more than 10% in the first three months of the year compared to 2024, beating expectations. Shares climbed 12% after the call, with Chief Executive Officer Joe Dominguez confirming that Constellation’s pending purchase of natural gas and geothermal energy firm Calpine is on track to be completed by the end of the year, and that the nuclear power utility is “working hard to meet the power needs of customers nationwide, including powering the new AI products that Americans increasingly are using in their daily lives and that businesses and government are using to provide better products and services.”
But as my colleague Matthew Zeitlin reported, Dominguez also threw some “lukewarm water on the most aggressive load growth projections,” telling investors that “it’s not hard to conclude that the headlines are inflated.” As Matthew points out, Dominguez also has some reason to downplay expectations, including that “there needs to be massive investment in new power plants,” which could affect the value of Constellation’s existing generation fleet.
The Rockefeller Foundation aims to phase out 60 coal-fired power plants by 2030 by using revenue from carbon credits to cover the costs of closures, the Financial Times reports. The team working on the initiative has identified 1,000 plants in developing countries that would be eligible for the program under its methodology.
Rob and Jesse go deep on the electricity machine.
Last week, more than 50 million people across mainland Spain and Portugal suffered a blackout that lasted more than 10 hours and shuttered stores, halted trains, and dealt more than $1 billion in economic damage. At least eight deaths have been attributed to the power outage.
Almost immediately, some commentators blamed the blackout on the large share of renewables on the Iberian peninsula’s power grid. Are they right? How does the number of big, heavy, spinning objects on the grid affect grid operators’ ability to keep the lights on?
On this week’s episode of Shift Key, Jesse and Rob dive into what may have caused the Iberian blackout — as well as how grid operators manage supply and demand, voltage and frequency, and renewables and thermal resources, and operate the continent-spanning machine that is the power grid. Shift Key is hosted by Robinson Meyer, the founding executive editor of Heatmap, and Jesse Jenkins, a professor of energy systems engineering at Princeton University.
Subscribe to “Shift Key” and find this episode on Apple Podcasts, Spotify, Amazon, or wherever you get your podcasts.
You can also add the show’s RSS feed to your podcast app to follow us directly.
Here is an excerpt from our conversation:
Robinson Meyer: So a number of people started saying, oh, this was actually caused because there wasn’t enough inertia on the grid — that Spain kind of flew too close to the sun, let’s say, and had too many instantaneous resources that are metered by inverters and not by these large mechanical generators attached to its grid. Some issue happened and it wasn’t able to maintain the frequency of its grid as needed. How likely do you think that is?
Jesse Jenkins: So I don’t think it’s plausible as the precipitating event, the initial thing that started to drive the grid towards collapse. I would say it did contribute once the Iberian grid disconnected from France.
So let me break that down: When Spain and Portugal are connected to the rest of the continental European grid, there’s an enormous amount of inertia in that system because it doesn’t actually matter what’s going on just in Spain. They’re connected to this continen- scale grid, and so as the frequency drops there, it drops a little bit in France, and it drops a little bit in Latvia and all the generators across Europe are contributing to that balance. So there was a surplus of inertia across Europe at the time.
Once the system in Iberia disconnected from France, though, now it’s operating on its own as an actual island, and there it has very little inertia because the system operator only scheduled a couple thousand megawatts of conventional thermal units of gas power plants and nuclear. And so it had a very high penetration on the peninsula of non-inertia-based resources like solar and wind. And so whatever is happening up to that point, once the grid disconnected, it certainly lacked enough inertia to recover at that point from the kind of cascading events. But it doesn’t seem like a lack of inertia contributed to the initial precipitating event.
Something — we don’t know what yet — caused two generators to simultaneously disconnect. And we know that we’ve observed oscillation in the frequency, meaning something happened to disturb the frequency in Spain before all this happened. And we don’t know exactly what that disturbance was.
There could have been a lot of different things. It could have been a sudden surge of wind or solar generation. That’s possible. It could have been something going wrong with the control system that manages the automatic response to changes in frequency — they were measuring the wrong thing, and they started to speed up or slow down, or something went wrong. That happened in the past, in the case of a generator in Florida that turned on and tried to synchronize with the grid and got its controls wrong, and that causes caused oscillations of the frequency that propagated all through the Eastern Interconnection — as far away as North Dakota, which is like 2,000 miles away, you know? So these things happen. Sometimes thermal generators screw up.
Music for Shift Key is by Adam Kromelow.