This may provide some relief to renewables developers and investors, who are especially sensitive to financing costs. “On the financing side, high rates are never going to be exactly a good thing,” Advait Arun, a climate and infrastructure analyst at the Center for Public Enterprise, told me. “I think in this case, it’s going to be good that we’re finally seeing cuts.”
Because the fuel for solar and wind energy is essentially free, the lion’s share of the cost to develop these energy sources comes up front, meaning that interest rates can have a disproportionate effect on how projects pencil out. Renewable projects also tend to carry more debt than fossil fuel projects, according to energy consultancy Wood Mackenzie. When interest rates rise by 2 percentage points, the consultancy estimated, the levelized cost of electricity for renewables rises by 20%, compared to 11% for a gas-fired power plant, which might have higher operating costs but less need to borrow.
But the challenges for the renewables industry go well beyond financing. Developers are still wondering how they will be able to use Chinese-linked components without losing eligibility for clean energy tax credits. Those tax credits now come with a ticking clock after the passage of this summer’s One Big Beautiful Bill Act, which shortened the eligibility period for wind and solar projects. The Treasury Department also tightened the definition of what it means to “start construction,” making qualification even more of a race. All the while, the Trump administration’s regulatory assault on the sector, especially wind, has led to project cancellations across the industry.
“High interest rates obviously impact the business, but there are a lot of other headwinds and other things going wrong, as well,” Gautam Jain, a senior research scholar at the Center on Global Energy Policy at Columbia University, told me. “If anything, compared to the beginning of the year, rates have come down quite a bit.”
Maheep Mandloi, an analyst at the investment bank Mizuho Securities, wrote in a note to clients that renewable stocks rose last week in part because investors saw yields falling on 10-year government bonds. Ten-year Treasuries are a widely used benchmark for corporate debt, and when they get cheaper, it often means that companies can access financing more cheaply.
Falling 10-year yields are also a sign that the market anticipates a Fed rate cut. So far this year, the 10-year Treasury bond yield has fallen from 4.57% to 4.00% as of Wednesday afternoon after the rate cut was announced.
Lower borrowing costs are a welcome transition for the industry. Borrowing costs started to rise dramatically in 2022, as the Fed hiked interest rates to combat the worst inflation the U.S. had seen since the early 1980s. Annual price increases had been bouncing around or even below 2% since the 2008 recession before climbing to as high as 9% in the summer of 2022, following Russia’s invasion of Ukraine, which led to an energy price shock. The uneven and stimulus-fueled economic recovery from Covid-19 also created price instability throughout the economy, including the renewable energy industry.
Renewable energy businesses in particular were hammered by higher interest rates, as well as higher costs for commodities like steel and for final products like solar panels.
Even as unprecedented government support flowed into the renewables industry from the Inflation Reduction Act, signed in August 2022, clean energy stocks continued to stagnate, with the iShares Clean Energy ETF falling over 30% from the beginning of the Biden administration through the end of 2023. (Despite the assault from the Trump administration, the index has actually risen about 30% so far this year after falling in the fall and winter of 2024, as uncertainty around the IRA’s tax credits has dissipated.)
One of the poster children for renewables dysfunction is the Danish wind developer Orsted, which has been a victim of just about every brickbat thrown at the industry. In its most recent financial statement, the company said that its future earnings estimates were imperiled by “assumptions with major uncertainty,” which included “investment tax credits, interest rates, imposed tariffs in the U.S., and the supply chain.”
Home solar giant Sunrun, too, has cited financing stresses. In its most recent quarterly report, the company disclosed that “rising interest rates, including recent historic increases starting in 2021 … [are] reducing the proceeds we receive from certain Funds.” It also acknowledged that “because our financing structure is sensitive to volatility in interest rates, higher rates increase our cost of capital and may decrease the amount of capital available to us to finance the deployment of new solar energy systems.” High rates, the company disclosed, “have impacted and may continue to impact our business and financial results.”
Even as rates come down, the renewable industry still has the Trump administration to contend with. The various agencies of the executive branch have shown little hesitation about getting in the way of renewable energy development, even for projects that are already nearly complete. The Treasury Department also has yet to issue guidance on complying with OBBBA’s rules about sourcing from Chinese suppliers, prolonging uncertainty for many in the industry. Trump’s tariff policy, too, remains a potential wildcard, as developers await a Supreme Court ruling on the legality of the president’s efforts thus far.
“In terms of being able to build more supply with the benefit of lower financing costs,” Arun told me, “I think this is where we’re running into all of the issues with delays in procuring components — the uncertainty regarding whether the tariffs will be struck down or not, and of course, changes to the inflation Reduction Act through the OBBBA.”
Last week, analysts at Rhodium Group projected that Trump’s policies could slow U.S. progress on reducing emissions by more than half.
For renewables developers, the rate cuts may be welcome, but everything else — and there’s a lot of everything else — may be what really matters, Jain told me. “All those things add additional uncertainty, and anybody who’s in the space will be aware that more could come,” he said. “Of course, lower rates will help, but it’s a combination of the two.”
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