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A practical guide to using the climate law to get cheaper solar panels, heat pumps, and more.

Today marks the one year anniversary of the Inflation Reduction Act, the biggest investment in tackling climate change the United States has ever made. The law consists of dozens of subsidies to help individuals, households, and businesses adopt clean energy technologies. Many of these solutions will also help people save money on their energy bills, reduce pollution, and improve their resilience to disasters.
But understanding how much funding is available for what, and how to get it, can be pretty confusing. Many Americans are not even aware that these programs exist. A poll conducted by The Washington Post and the University of Maryland in late July found that about 66% of Americans say they have heard “little” or “nothing at all” about the law’s incentives for installing rooftop solar panels, and 77% have heard little or nothing about subsidies for heat pumps. This tracks similar polling that Heatmap conducted last winter, suggesting not much has changed since then.
Below is Heatmap’s guide to the IRA’s incentives for cutting your carbon footprint at home. If you haven’t heard much about how the IRA can help you decarbonize your life, this guide is for you. If you have heard about the available subsidies, but aren’t sure how much they are worth or where to begin, I’ll walk you through it. (And if you’re looking for information about the electric vehicle tax credit, my colleague at Heatmap Robinson Meyer has you covered with this buyer’s guide.)
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There’s funding for almost every solution you can think of to make your home more energy efficient and reduce your fossil fuel use, whether you want to install solar panels, insulate your attic, replace your windows, or buy electric appliances. If you need new wiring or an electrical panel upgrade before you can get heat pumps or solar panels, there’s some money available for that, too.
The IRA created two types of incentives for home energy efficiency improvements: Unlimited tax credits that will lower the amount you owe when you file your taxes, and $8.8 billion in rebates that function as up-front discounts or post-installation refunds on equipment and services.
The tax credits are available now, but the rebates are not. The latter will be administered by states, which must apply for funding and create programs before the money can go out. The Biden administration began accepting applications at the end of July and expects states to begin rolling out their programs later this year or early next.
The home tax credits are available to everyone that owes taxes. The rebates, however, will have income restrictions (more on this later).
“The Inflation Reduction Act is not a limited time offer,” according to Ari Matusiak, the CEO of the nonprofit advocacy group Rewiring America. The rebate programs will only be available until the money runs out, but, again, none of them have started yet. Meanwhile, there’s no limit on how many people can claim the tax credits, and they’ll be available for at least the next decade. That means you don’t need to rush and replace your hot water heater if you have one that works fine. But when it does break down, you’ll have help paying for a replacement.
You might want to hold off on buying new appliances or getting insulation — basically any improvements inside your house. There are tax credits available for a lot of this stuff right now, but you’ll likely be able to stack them with rebates in the future.
However, if you’re thinking of installing solar panels on your roof or getting a backup battery system, there’s no need to wait. The rebates will not cover those technologies.
A few other caveats: There’s a good chance your state, city, or utility already offers rebates or other incentives for many of these solutions. Check with your state’s energy office or your utility to find out what’s available. Also, it can take months to get quotes and line up contractors to get this kind of work done. If you want to be ready when the rebates hit, it’s probably a good idea to do some of the legwork now.
If you do nothing else this year, consider getting a professional home energy audit. This will cost several hundred dollars, depending on where you live, but you’ll be able to get 30% off or up to $150 back under the IRA’s home improvement tax credit. Doing an audit will help you figure out which solutions will give you the biggest bang for your buck, and how to prioritize them once more funding becomes available. The auditor might even be able to explain all of the existing local rebate programs you’re eligible for.
The Internal Revenue Service will allow you to work with any home energy auditor until the end of this year, but beginning in 2024, you must hire an auditor with specific qualifications in order to claim the credit.
Let’s start with what’s inside your home. In addition to an energy audit, the Energy Efficiency Home Improvement Credit offers consumers 30% off the cost (after any other subsidies, and excluding labor) of Energy Star-rated windows and doors, insulation, and air sealing.
There’s a maximum amount you can claim for each type of equipment each year:
$600 for windows
$500 for doors
$1,200 for air sealing and insulation
The Energy Efficiency Home Improvement Credit also covers heat pumps, heat pump water heaters, and electrical panel upgrades, including the cost of installation for those systems. You can get:
$2,000 for heat pumps
$600 for a new electrical panel
Yes, homeowners can only claim up to $3,200 per year under this program until 2032.
Also, one downside to the Energy Efficiency Home Improvement Credit is that it does not carry over. If you spend enough on efficiency to qualify for the full $3,200 in a given year, but you only owe the federal government $2,000 for the year, your bill will go to zero and you will miss out on the remaining $1,200 credit. So it could be worth your while to spread the work out.
The other big consumer-oriented tax credit, the Residential Clean Energy Credit, offers homeowners 30% off the cost of solar panels and solar water heaters. It also covers battery systems, which store energy from the grid or from your solar panels that you can use when there’s a blackout, or sell back to your utility when the grid needs more power.
The subsidy has no limits, so if you spend $35,000 on solar panels and battery storage, including labor, you’ll be eligible for the full 30% refund, or $10,500. The credit can also be rolled over, so if your tax liability that year is only $5,000, you’ll be able to claim more of it the following year, and continue doing so until you’ve received the full value.
Geothermal heating systems are also covered under this credit. (Geothermal heat pumps work similarly to regular heat pumps, but they use the ground as a source and sink for heat, rather than the ambient air.)
Here’s what we know right now. The IRA funded two rebate programs. One, known as the Home Energy Performance-Based Whole House Rebates, will provide discounts to homeowners and landlords based on the amount of energy a home upgrade is predicted to save.
Congress did not specify which energy-saving measures qualify — that’s something state energy offices will decide when they design their programs. But it did cap the total amount each household could receive, based on income. For example, if your household earns under 80% of the area median income, and you make improvements that cut your energy use by 35%, you’ll be eligible for up to $8,000. If your household earns more than that, you can get up to $4,000.
There’s also the High-Efficiency Electric Home Rebate Program, which will provide discounts on specific electric appliances like heat pumps, an induction stove, and an electric clothes dryer, as well as a new electrical panel and wiring. Individual households can get up to $14,000 in discounts under this program, although there are caps on how much is available for each piece of equipment. This money will only be available to low- and moderate-income households, or those earning under 150% of the area median income.
Renters with a household income below 150% of the area median income qualify for rebates on appliances that they should be able to install without permission from their landlords, and that they can take with them if they move. For example, portable appliances like tabletop induction burners, clothes dryers, and window-unit heat pumps are all eligible for rebates.
It’s also worth noting that there is a lot of funding available for multifamily building owners. If you have a good relationship with your landlord, you might want to talk to them about the opportunity to make lasting investments in their property. Under the performance-based rebates program, apartment building owners can get up to $400,000 for energy efficiency projects.
For the most part, yes. But the calculus gets tricky when it comes to heat pumps.
Experts generally agree that no matter where you live, switching from an oil or propane-burning heating system or electric resistance heaters to heat pumps will lower your energy bills. Not so if you’re switching over from natural gas.
Electric heat pumps are three to four times more efficient than natural gas heating systems, but electricity is so much more expensive than gas in some parts of the country that switching from gas to a heat pump can increase your overall bills a bit. Especially if you also electrify your water heater, stove, and clothes dryer.
That being said, Rewiring America estimates that switching from gas to a heat pump will lower bills for about 60% of households. Many utilities offer tools that will help you calculate your bills if you make the switch.
The good news is that all the measures I’ve discussed in this article are expected to cut carbon emissions and pollution, even if most of your region’s electricity still comes from fossil fuels. For some, that might be worth the monthly premium.
Tax Credit #1 offers 30% off the cost of energy audits, windows, doors, insulation, air sealing, heat pumps, electrical panels, with a $3200-per-year allowance and individual item limits.
Tax Credit #2 offers 30% off the cost of solar panels, solar water heaters, batteries, and geothermal heating systems.
Rebate Program #1 will offer discounts on whole-home efficiency upgrades depending on how much they reduce your energy use, with an $8,000 cap for lower-income families and a $4,000 cap for everyone else.
Rebate Program #2 is only for low- and moderate- income households, and will offer discounts on specific electric appliances, with a $14,000 cap.
Read more about the Inflation Reduction Act:
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A longtime energy analyst argues that there are no solutions to the hyperscale problem, only tradeoffs.
Sam Altman, Dario Amodei, and Elon Musk need sign-off from fewer than a dozen board members to commit their companies to multibillion-dollar moves. The power plants that supply their data centers need sign-off from 13 states (plus D.C.), thousands of generators, millions of customers, and a federal regulator whose ratemaking standard predates the personal computer in order to build anything new.
Everyone in tech knows about the CEOs of the foundational artificial intelligence labs. Only energy nerds know the names of the people running our grid operators. That anonymity is a feature, not a bug. Grid operators generally think in decades, not years. But right now, they’re telling the U.S. that it has years, not decades, to figure out its own new path forward.
For decades, this process sufficed for energy generators (and regulators) grown accustomed to gradual, predictable load growth. But over the past several years, the scale and speed of increasing energy demand has overwhelmed the supply -side’s ability to respond. The resulting strain on the grid has reverberated through every rung of the supply chain, delaying development timelines, increasing costs, and elevating energy from political conversations to dinner table discussions.
The loudest creaks and groans are coming from PJM Interconnection, North America’s largest grid operator. Residential bills in the PJM service area are climbing at a dizzying pace. Recent capacity auctions have ended with record prices, which PJM’s own market monitor blames on the explosive growth in data center power demand. Pennsylvania Governor Josh Shapiro has attempted to pressure PJM to lower its capacity price cap. Even Secretary of Energy Chris Wright has called on the Federal Energy Regulatory Commission to develop new procedures to help get data centers online faster.
David Mills, PJM’s CEO, published a 70-page report in May acknowledging that current market rules cannot keep pace with AI-driven load growth. And yet he also refused to recommend a path forward, leaving the decision to “state regulators and legislatures, to FERC, to consumers.”
The most essential grid infrastructure, he explained, “is not a price curve or a performance obligation — it is legitimacy.” In other words, what’s broken isn’t a parameter inside the capacity market, but rather the capacity market itself, along with the political conditions under which it operates. PJM calls this the “credibility trap”: high prices accurately signal that new investment is needed, but when those prices become politically untenable, government intervenes and investment stalls.
The fix, Mills writes, “requires structural choices, not just parameter adjustments.”
Mills is speaking to a deeper issue with the grid than its ability to respond to shifting market dynamics, which is that hyperscalers and grid operators are built to solve two different kinds of problems. Hyperscalers solve engineering problems with specifiable objectives, known constraints, verifiable outcomes. Engineering problems reward concentrated authority and unilateral decision-making.
Grid operators, on the other hand, solve coordination problems. The information they rely on to do so is dispersed across millions of stakeholders, continuously revised and often contradictory, and operators’ preferences are not so much known as they are revealed through deliberation. FERC’s standard for wholesale rates is not whether those rates are objectively “correct,” but rather whether the market settled on those rates through fair competition. The process does not just determine the answer, it essentially is the answer.
This construction is the category error driving the current AI-grid collision. The electricity grid is not an engineering problem with coordination problems attached. It is a coordination problem with engineering problems embedded in it. Treat it as the former and you lose all the information that gets generated in the process of market-based price discovery. You also lose all the buy-in that occurs when real people are faced with real trade-offs and have to make hard, binding choices.
Mills did lay out three possible structural paths in his May letter:
These pathways are not equivalent — unlike with an engineering problem, there are no cut-and-dried solutions here. There are only trade-offs and questions about who bears their consequences. Path C is likely the better answer, while Path A is more expedient. The gap between them is the work PJM’s constituents have to manage over the coming years. PJM may choose the wrong path, or arrive at the right one too late.
The alternative is not hypothetical. If hyperscalers aren’t willing to wait for PJM customers to decide which path they want to take (and recent history suggests they are not) they will build behind-the-meter generation, sign bespoke deals with regulated utilities, and restart dormant nuclear plants. America would be left with two grids, one for compute, one for everything else. The first will be reliable and expensive. The second will be cheaper, fragile, and stranded with the costs of the system the first walked away from. The market would lose the dispatch signal, the error-correcting price mechanism, and the legitimacy of the system that has reliably powered the Mid-Atlantic for two decades.
Economist Friedrich Hayek described the limits of humans’ planning capabilities better than anyone in his 1974 Nobel Prize lecture, using the metaphor of the craftsman shaping his handiwork versus the gardener cultivating growth. The craftsman thinks they can make a perfect tool but repeatedly runs up against the boundaries of their own knowledge, whereas the gardener learns to manage new information as it arises, tending not to the product itself but rather to the conditions that produce it.
Hyperscalers are not bad actors. They have legitimate interests and the political capital to help shape the grid’s future. But we should resist the Newtonian urge to meet unexpected, swiftly moving demand with equally swift supply. Markets and physical systems both tend toward equilibrium, but the former finds it through deliberation, not collision. Instead of trying to unilaterally craft a better grid, hyperscalers might find a better path if they work with the practitioners who already know how to garden.
On Greenland’s rare earths, Baker Hughes’ geothermal bet, China’s green H2
Current conditions: A sprawling heat dome stretching from the Midwest to the East Coast is raising temperatures for more than 200 million Americans upward of 100 degrees Fahrenheit this week • Three firefighters died battling wildfires along the Colorado-Utah border on Saturday, while winds fanned the flames of the Cottonwood Fire in southwest Utah into the largest blaze in the U.S. right now • Back-to-back tropical storms Mekkhala and Higos battered Japan’s coast over the weekend, leaving at least one dead in a landslide.
For much of the past decade, Japan looked primed for offshore wind development for the same reasons the American industry first took root in the Northeast: It’s coastal, densely populated, and — with its nuclear power stations either shut down or idled — it’s more reliant on fossil fuels that it doesn’t locally produce than ever before. But building turbines off Japan’s shores has proven tricky as project costs ballooned. On Friday, Norway’s Equinor announced its decision to close its offshore wind division in Japan, after failing to win any leases at repeated auctions over the past eight years. “This decision reflects a reassessment of Equinor’s strategic direction, with a strengthened focus on integrated power markets,” the company said in a statement on its Japanese website.
The move comes two years after Denmark’s Orsted exited Japan. Last August, a consortium led by the industrial giant Mitsubishi pulled out of Japan’s first three offshore wind projects citing what Reuters described as concerns of surging costs. Last October, as I told you at the time, the newly elected government of Prime Minister Sanae Takaichi postponed a key procedural step for setting government funding levels for offshore wind projects. Instead, as you may recall, Takaichi has put a heavy focus on restarting the nuclear reactors mothballed after the 2011 Fukushima disaster and even expanding the fleet.

For much of the 20th century, the geopolitical relevance of the world’s largest island stemmed from its central location as a kind of poker table situated right where Washington, Brussels, and Moscow meet. More recently, it’s been about Greenland’s untapped mineral riches. As polar ice recedes, the autonomous Danish territory has opened previously inaccessible deposits of rare earths and copper to prospecting. For Greenland, whose population of fewer than 60,000 is roughly 85% Indigenous, mining has offered an opportunity to diversify its economy beyond just fishing, augmenting an expanding tourism sector with some heavy industry. In 2017, when I visited local political officials in Nuuk, the capital, sustainability-minded liberals pined for an alternative development approach that took advantage of Greenland’s unique and pristine wilderness to, for example, build out a biomedical industry that draws upon research into the survival traits that allow life to thrive in harsh polar environments. At the time, the populists pitching industrialism as a fast track to independence seemed, to me at least, destined to win the argument. But the green techno-optimists may yet get the chance to prove their approach.
Last week, regulators in Nuuk formally rejected an Australian mining company’s bid to renew its exploration license for one of the most advanced rare earths projects in Greenland. The Western Australia-based Energy Transition Minerals had been locked in litigation with the Greenlandic government over whether its project could safely extract rare earths such as neodymium, praseodymium, and terbium for magnets and batteries without producing uranium as a byproduct. A previous government in Greenland had banned uranium mining in 2021, effectively halting ETM’s Kvanefjeld project. But the company had told investors in February that it “remains confident in the merits” of its position in negotiations with Greenland and “resolute in our intention to develop Kvanefjeld responsibly and in accordance with international best practice.” Just last week, the company published data showing that it had identified 10 new rare earth deposits “with uranium levels recorded below regulatory thresholds.” If it factored into negotiations at all, it wasn’t enough to change the outcome. Following the rejection on Friday, the company told Reuters: “Greenland has positioned itself as open for business. This decision creates a different impression.” In a sign of how the political winds may be shifting, the headline on Sunday’s front-page story in Sermitsiaq, one of Greenland’s only national newspapers, warned of the “environmental bombs” coming just from future American military bases on the island.
Of all the ways to build up, shore up, and clean up America’s grid, geothermal energy is easily among the most elegant, narratively speaking. We already quietly operate the world’s largest geothermal power plant. The new generation of companies racing to build new power stations require the very same battle-hardened drilling equipment, technologies, and workers that sustained the fracking boom and turned the U.S. into a top global producer of oil and gas. Many of the best-mapped hot rocks are located out west, where the federal government owns vast tracts of land, meaning the strong bipartisan consensus in support of geothermal energy development can, in fact, translate into faster approvals for projects. It’s a bet that one of the nation’s largest oilfield services providers is now making. Last week, Baker Hughes inked a deal with the geothermal developer Mantle Reach Power to support construction of as much as 500 megawatts of new generating capacity. As part of the deal, Baker Hughes will provide its drilling technologies, in a move the company said would “de-risk and deliver” on the promises of geothermal power. “Geothermal is a clean power solution that is proving to be a vital contributor to advancing sustainable energy development, with incredible potential to enhance U.S. energy security, support digital infrastructure, and ensure energy remains accessible and affordable,” Baker Hughes CEO Lorenzo Simonelli said in a statement.
Meanwhile, federal regulators just approved the environmental review of a new conventional geothermal project. Once complete, Ormat Technologies’ Pearl geothermal project in Nevada’s Esmeralda County will generate up to 60 megawatts of power. It’s just the latest approval of what Think Geo Energy called a series of approvals for Ormat’s proposed expansion in Nevada.
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Even before the Iran War, momentum was gathering in China for a green hydrogen buildout. The “most important low-carbon policy for 2025,” according to the analyst Jian Wu, was China’s decision to start subsidizing green hydrogen-related applications from central government coffers for the first time as Beijing sought to wean off fossil fuel imports and make use of solar and wind farms that had grown so abundant that the country’s grid operators recently phased out key incentives for renewables. Since the war, Beijing has turned its attention to shoring up its domestic fuel supplies, whether by increasing its domestic drilling, chemically-processing coal, or zapping water with enough renewable electricity to cleanly separate out the hydrogen molecules. Now it’s placing a big bet on the latter. China just put out a new five-year plan for the energy sector with a goal to install more than 2 million metric tons of annual capacity to produce green hydrogen by the end of the decade, Hydrogen Insight reported. That would more than double the existing capacity.
Overall, the document raises the target for China to generate half its electricity from non-fossil sources by 2030. But its goals for the wind and solar sectors represent a significant slowdown from the recent pace of development, indicating the government’s interest in diversifying its carbon-free electricity sector.
At present, I see three guarantees in my life: Death, taxes, and the likelihood that another Chinese nuclear plant will make significant enough progress to merit telling you about it. Readers hoping to understand the stakes of America’s incipient nuclear renaissance are wise to keep track of how successfully China’s state-owned reactor developers have been building their own domestically-sourced version of the flagship U.S. reactor design. I can’t keep track of how many times we have covered Chinese reactor milestones. But add this to the list: Last week, World Nuclear News reported, the second of six Hualong One reactors at the Taipingling nuclear power plant in Guangdong province started up, sustaining a chain reaction for the first time. The speed with which China General Nuclear completed the domestically-supplied reactor — the design for which is largely cribbed from the Westinghouse AP1000 — highlights the strategy American atomic energy advocates are increasingly promoting. A nonprofit called the Nuclear Scaling Initiative launched in 2024 to propound the idea of focusing on reactors that can be built identically over and over.
Investors debate the right way to bet on the nuclear revival, and the growing list of startups debuting on the stock market through reverse merger deals that require less scrutiny than traditional initial public offerings provides ample grist for disagreement. But here’s a surefire wrong way: Selling $1.5 million of call option contracts for your employer’s stock on the day of a major announcement that you are playing a pivotal role in overseeing. Yet that’s exactly what the Department of Justice accuses Casey Muggleston, a former engineering manager in charge of relicensing the shuttered Three Mile Island power plant, of doing on the very day his employer, Constellation, announced a landmark deal with Microsoft to reopen the facility to supply its data centers with electricity. If convicted, Muggleston could face a maximum of 25 years in prison, according to ABC27, a TV news station in Harrisburg, Pennsylvania.
There is a heat wave in Europe, the world’s fastest warming continent. And so, as you may have heard, a perennial topic of online climate discourse has returned: Why don’t more Europeans have air conditioning?
I’m partially convinced this is psy op, or at least a figment of how social media organizes attention. I have a hypothesis that various “For You” page algorithms, especially that of the social network X, began to reward content that performed unusually well across national borders a few years ago. Since then, the amount of America vs. Europe content has surged. (Of course, writers have been comparing American and European lifestyles for much longer than that.)
Suffice it to say, though: It’s a fraught topic. I’ve assumed that as extreme heat gets worse as the climate changes, Europeans will simply get on with it and install AC, much as Americans in the Pacific Northwest have done. Yet there are cultural and regulatory obstacles to AC’s growth in Europe.
I’m sure I’ll write about it in the future, but for now I want to get a grip on the facts themselves. And so as a Friday special, I present to you — the facts about European AC, as I understand it:
Thanks so much for reading, and talk soon.