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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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Europe’s heat wave has finally ended — and good riddance. The continent recorded at least 1,300 excess deaths over the past week, according to the World Health Organization. Mortuaries in Paris and other cities were overwhelmed.
North America will now get its turn with summertime heat: At the end of this week, New York, Philadelphia, and other cities down the East Coast — including several where World Cup knock-out games will be played — could see their hottest temperatures since 2012.
As I wrote last week, these bouts of extreme heat are caused by climate change. Severe and record-breaking heat waves are one of anthropogenic global warming’s clearest and most indisputable symptoms.
But as I also wrote last week, Europe and North America have very different ways of dealing with extreme heat. Most Americans have air conditioners, but they remain rare in Europe — and especially in northwestern Europe, including France, Germany, and the United Kingdom.
Since last week, I have read countless explanations about why Europeans don’t have air conditioning at the same rates as Americans — or even Canadians. Perhaps Americans and Europeans have a different relationship to suffering, goes one theory, or maybe the European left has managed to politicize air conditioning in a way that the American left has never tried to do. The cultural divide here is more real than I once would have thought: In Paris, the deputy mayor chided Americans for even asking about Europe’s AC use; she argued air conditioning “contributes and aggravates” to air pollution and climate change. In Florida, meanwhile, we name elementary schools after the inventor of mechanical refrigeration.
Throughout all of this, I’ve assumed that Europeans would purchase air conditioning as the warming climate demands it. Much like the Pacific Northwest, where AC adoption lagged the rest of the United States for decades, much of Western Europe used to enjoy a climate where AC was unnecessary. That changed in Oregon, Washington, and British Columbia after the 2021 heat dome. Now that summertime highs are rising in Europe, too, it seemed obvious that people would go out and buy window unit air conditioners — and where they can’t buy them because of local laws, they’ll push for reform.
It had not occurred to me, though, that a simpler obstacle might be blocking Europe’s adoption of AC. Jonas Nahm, a professor of industrial strategy at the Johns Hopkins School of Advanced International Studies, wrote in with a question: What if it’s the windows?
Do you know about Europe’s superior windows? Unlike the United States, where most of our windows hang on a sash and open vertically, the dominant form of window in Germany, Austria, France, Italy, and the rest of the Blue Banana are tilt-turn windows. This distinctive form of fenestration has a dual-action hinge, meaning it can tilt, opening at the top to let in light or air; and turn, swinging fully open on its hinges.
Tilt-turn windows are superior in most respects to our American sash windows or casements. Because they close more securely, they provide better protection against the elements; because you can swing them into a room and access both sides of a pane, they are easier to clean; and because you can tilt them from the bottom and crack them open at the top, they can ventilate a room without creating a draft. They are also ubiquitous in western Europe. Asked once what Germany meant to her, Germany’s former Chancellor Angela Merkel replied: “I think of well-sealed windows. No other country can make such well-sealed and nice windows.”
They are superior in all respects, I would say — except for one. When Americans in older buildings want to get an air conditioner, we go and buy a window unit, then we slide up the sash window and install it. But tilt-turn windows are not so accommodating. Those who have them must instead go and buy a portable AC unit that sits entirely inside a room, snake its hose out the top of the window, and then either purchase a fabric barrier or jerry-rig towels to seal off the crevices.
If you can’t buy a window unit, in other words, then your air conditioning options narrow. You either have to install an unsightly portable AC unit. Or you have to retrofit your entire home and install mini-splits — a far more expensive renovation that may not even be possible in historic or rental buildings.
Can windows alone explain Europe’s differing approach to air conditioning? It certainly explains a gap I’ve noticed in the discourse, where some Europeans seem to see air conditioning as an exorbitant luxury and Americans see it as, well, just another $250 purchase. It matters, too, that most Europeans heat their homes with radiators, meaning there is no forced-air ductwork system that a central air system can piggyback on. (Of course, my 100-year-old apartment building has radiators, too — but we have sash windows, and therefore window units.)
As it happens, I’ve lived in a home in the United States that had tilt-turn windows. An old German landlord of mine installed them in about half the house. We had window units too, but we stuck them in the few rooms that still had sash windows.
But of course, maybe what you don't have always seems more exotic to you. Not so long ago, I found myself in a smoky Berlin bar talking with a German about how much I liked and respected their windows. My companion was confused and asked me what windows were like in America, and I pantomimed opening a sash window and sticking my head out the bottom.
He was thrilled. Wait, he replied, just like in the movies?
I promise tomorrow's newsletter will not be about windows or air conditioning.
Monday’s Supreme Court decision will give Trump sweeping powers over the agency he already effectively controls.
The Supreme Court on Monday morning effectively OK-ed the firing of commissioners at independent agencies with no showing of cause, overturning a 90-plus-year-old precedent and granting the president seemingly vast powers to reshape the federal regulatory state. That likely includes agencies crucial to energy planning and governance, including the Federal Energy Regulatory Commission and the Nuclear Regulatory Commission (though not, notably, the Federal Reserve Board of Governors).
Harvard Law School professor Ari Peskoe argued in an amicus brief for the case alongside a bipartisan gaggle of 11 former FERC commissioners that deciding in the president’s favor on this case “would bulldoze the structural supports that Congress built into ratemaking commissions to protect its price-setting power from abuse,” protections that “foster regulatory stability for industries investing in essential infrastructure.”
So what’s left of that stability following the Supreme Court’s decision? “It’s been 3+ hours and the President has yet to fire a FERC Commissioner. So no immediate effect,” Peskoe told me in an email.
The case stemmed from Trump’s firing of Rebecca Slaughter, a member of the Federal Trade Commission, because her presence on the Commission would, he said, be “inconsistent with my Administration’s priorities.” Slaughter sued to be reinstated under a precedent established in the 1935 case Humphrey’s Executor v. the United States, in which the Supreme Court ruled that the Constitution did not give the president “illimitable power of removal” over government officials. On Monday, the court disagreed, deciding instead that the President should have wide discretion over the composition of agencies like the FTC, which “unquestionably exercises executive power and must therefore be controlled by the Chief Executive,” Chief Justice John Roberts wrote in his opinion for the majority.
In her dissent on the decision, which split 6-3 along the usual partisan lines, Justice Sonia Sotomayor listed FERC and the NRC as among the “dozens of independent commissions are now likely to become purely executive agencies, shifting tremendous power over broad swaths of American life into the President’s hands.”
Agencies like FERC tend not to be as explicitly politicized or partisan as, say, the Environmental Protection Agency, which is led by a single administrator who serves at the pleasure of the president, or the National Labor Relations Board or Federal Election Commission, which oversee areas of law and policy with stark partisan and ideological stakes. This is partly because FERC justifies decisions on electricity and natural gas policy with reference to “technical expertise,” Peskoe’s fellow Harvard Law School professor and former Obama White House official Jody Freeman told me. (If you have any doubt about this, go read through some 1,000-page-plus FERC orders.
FERC also tends to be more collegial than most other independent agencies. Meetings often include encomia to the agency’s chair for being consensus-oriented, and to its staff, who serve commissioners from both parties. Its recent “show cause” orders directing regional electricity markets to prove they’re taking steps to speed up grid interconnection for large new sources of demand garnered a 5-0 majority, with both Democrats on the Commission voting along with their Republican colleagues.
And FERC chairs do occasionally defy the presidents who have appointed them, most notably in Donald Trump’s first term, when then-Chair Neil Chatterjee dismissed Secretary of Energy Rick Perry’s request to support coal and nuclear power plants able to store fuel on site, thus propping up struggling electricity generators.
Interestingly, Chatterjee, who signed the amicus brief to the court, was relatively relaxed about Monday’s decision’s implications for his former agency about. He observed to me in an email, “given that the commission just voted 5-0 on the WH’s biggest priority before FERC I don’t see it being an issue in the near term.”
In other words, FERC and this White House, at least, already see eye to eye.
But that’s no coincidence. Since the beginning of this term, the White House has set out to rein in and control independent agencies, FERC among them. Though Trump initially tapped sitting Republican Commissioner Mark Christie to lead the commission, he ultimately declined to re-nominate Christie for a second five-year term, leading to Christie’s exit from the commission last August.
In his place, the president installed Laura Swett, who has allowed little daylight between the commission’s and the White House’s positions. Both have attempted to keep the focus on balancing the buildout of data centers to serve artificial intelligence while keeping a lid on consumer electricity prices.
While it’s not foreordained that FERC chairs will agree with the presidents that appointed them, even if they’re both members of the same party, Monday’s decision makes disagreement more dangerous for current and future FERC chairs to consider.
“There’s a bigger risk that they’ll have to ultimately yield to political pressure because they’ll have this very overt threat that they’ll be fired,” Freeman told me. “We’re going to see decisions that look more political, that look less expertly driven, and they probably will wax and wane with every new administration, which undermines stability.”
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.