Solar Could Lose Its Cost Advantage Over Gas

If you’re putting new power onto the grid right now, the cheapest option is likely solar. Thanks to years of declining equipment costs, generous federal subsidies, and voluntary renewables buyers like big technology companies, much of America’s planned future electricity generation is solar (along with battery storage). Of the 63 gigawatts planned to be added to the grid this year, the Energy Information Administration has estimated that solar will make up about half of it, while solar and storage collectively will make up over 80%.

While there’s no one single price for a megawatt-hour of any given power generation source, a good place to start are estimates from the financial advisory firm Lazard of the levelized cost of energy, which is supposed to allow comparisons between different generation sources. When Lazard put out its updated figures last summer, the average cost of utility solar was $61 per megawatt-hour. For a combined cycle natural gas plant, the most common type of gas generation, the average cost was $76.

But that math may be endangered, according to a new analysis by Morgan Stanley — to the point where solar could lose its competitive cost advantage with new natural gas.

“The cost of power generation is moving higher. The impact of tariffs and potential changes to subsidy support (i.e., IRA) will likely have an inflationary impact on the cost of power,” the analysts wrote to clients.

The team of analysts looked at the impact of both tariffs and the possible reduction or cessation of Inflation Reduction Act tax credits on utility-scale solar costs. According to Morgan Stanley’s figures, about half of the capital expenditure for a utility-scale solar project comes from the hardware, which is mostly the cost of the panels.

While some panels are produced in the United States, there are still significant imports from Southeast Asia, which currently face preliminary tariffs as high as several hundred percent. Those should become permanent later this month when the Department of Commerce completes its investigation into “dumping” by Chinese solar companies that have set up shop in the region.

The imports of these solar panels — some $10 billion in 2024, according to Tim Brightbill, a lawyer for a coalition of domestic solar manufacturers who are pursuing the anti-dumping case — “undercut and really drove down prices in the U.S. solar market,” Brightbill told a group of reporters Thursday. “It forced U.S. producers to significantly reduce their prices,” he said. “The industry was sort of pushed into a cost price squeeze.”

Those days are likely over. Instead, a variety of economic and political factors look to force prices up instead of down for new renewable power.

In a world where capital expenditure for solar projects goes up 5% to 10% — a range the analysts called “reasonably plausible” based on how much solar panels make up of the cost of a project — the Morgan Stanley analysts estimate that to maintain an industry standard investor return in the low-teens, power purchase agreements prices would have to rise to $52 to $57 per megawatt-hour, up from $49 to $54. “In a scenario where tariffs hold and IRA tax credits are eliminated,” the analysts write, those prices might go up as high as $73.

Those PPA prices could seriously degrade the advantage solar has over new natural gas generation, the Morgan Stanley analysts found, despite natural gas seeing its own cost pressures.

For one, there’s the shortage of gas turbines that’s causing higher equipment prices, bringing capital expenditures for a new gas plant up by around 75% in the last few years, the analysts said. Natural gas will also face its own hurdles from tariffs.

After penciling all that out, the Morgan Stanley analysts project that industry standard returns would require PPA prices of about $75 to $80 for natural gas.

You may notice how close that is to the pessimistic forecast on solar pricing.

“While current power market prices are not at levels that would support a new-build of natural gas turbines impacted by a tariff, we believe the co-location opportunity is still viable as a mid-to-high $70/MWh PPA price is still well within the willingness-to-pay for data center customers,” the Morgan Stanley analysts wrote. In other words, data centers that need a lot of power and don’t particularly care about carbon emissions or supporting renewables could end up procuring new gas.

That seems to track what we’re seeing out in the world. In January, Chevron and the investment firm Engine No. 1 announced a joint venture to deploy GE Vernova turbines on site to power data centers.

Natural gas pipeline giant Kinder Morgan’s executive chairman Richard Kinder told analysts Wednesday during the company’s quarterly earnings call that the company had seen a “nice uptick” in demand, “driven in part by the surge in AI and data centers.” The company’s natural gas pipelines president Sital Mody told analysts that Kinder Morgan is “actively pursuing opportunities to provide supply to ultimately feed these upcoming data centers,” and its chief executive Kimberley Dang called out Arizona as a potential market for gas-powered data centers.

So far this year, despite the threat of IRA repeal and protectionist tariffs hanging over the industry (not to mention “Liberation Day” tariffs on inputs like steel), prices paid for solar power have held steady, according to data from LevelTen, a power purchase agreement marketplace.

“Despite policy uncertainty, clean energy deals are moving forward at high volume,” Zach Starsia, LevelTen’s energy marketplace senior director, told me in an email. “There’s more certainty for projects expected to reach [commercial operation] in the next 12 to 16 months. It’s the longer-term, early-stage projects that are two to three years out where cost predictability becomes more difficult. Buyers are acting now to secure favorable pricing and access before tariffs and policy shifts begin to tighten market conditions,” Starsia said.

The company attributed the steady prices to the sector “finding itself on firmer footing following a long period of pandemic-era supply chain woes and an array of policy headwinds,” according to a LevelTen market analysis. While new and scheduled tariffs “are certainly a cause for concern,” the analysis said, the market is “well-attuned” to them due to the long history of solar tariffs since 2012.

“We expect upward pressure on PPA prices through 2025, particularly in technologies and regions exposed to tariffs and supply chain risk,” Starsia said. But he also wrote, perhaps optimistically, “The window is still open for prepared buyers to secure strong deals before price shifts fully take hold.”