US solar installations reach 43 GW in 2025 despite slowdown
Solar accounted for 54% of new US generation capacity in 2025, retaining its position as the top technology for the fifth straight year, while PV and storage together made up 79% of new electrical capacity, according to the latest report from the Solar Energy Industries Association (SEIA) and Wood Mackenzie.
March 12, 2026 Ben Zientara
The US solar industry installed 43.2 GW of capacity in 2025, according to the new “Solar Market Insight 2025 Year in Review” report by SEIA and Wood Mackenzie.
The additions led to solar accounting for 54% of all new US electricity-generating capacity, retaining its position as the number one technology for the fifth year in a row. In total, solar, wind and storage accounted for 92% of all new generation capacity.
While annual solar capacity installations remain high, overall installation volumes were down 14% compared to 2024 levels. The report says this slowdown was driven by a massive drop in utility-scale installations concentrated entirely in the fourth quarter, during which installations fell by 40% quarter over quarter.
This decline was exacerbated by the passage of the One Big Beautiful Bill Act (OBBBA), which the report said caused developers to reevaluate their project pipelines and push online dates into the 2026-28 window.
Despite the year’s reduced capacity additions and expectations for moderate growth in installations in the coming decade, SEIA and Wood Mackenzie assert that the US solar industry will retain its leading position.
“It’s clear that solar will continue to be the dominant source of new power capacity in the United States, even as gas generation continues to grow,” said Michelle Davis, head of solar at Wood Mackenzie and lead author of the report. “Strong demand growth combined with escalating costs of new gas plants will allow solar to remain competitive, even without tax credits.”
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At the state level, Texas again led the nation in installation volume, adding around 11 GW of new solar capacity in 2025, which roughly matched the state’s total from the two years prior.
California came in second with 4.7 GW of capacity additions, while Indiana jumped from its 10th-place showing in 2024 to reach the third spot in the nation for 2025, with 3 GW installed.
In total, 11 states set new annual installation records in 2025, and 12 states added over 1 GW of new solar capacity. The report found that over two-thirds of all solar capacity installed in 2025 was built in states won by President Trump.
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