The expansion of solar energy installations in the United States slowed during 2025, reflecting regulatory shifts and policy changes that affected the renewable energy sector, according to a report cited by Reuters.
Solar Installations Decline Compared to Previous Year
A study released by the Solar Energy Industries Association (SEIA) and research firm Wood Mackenzie found that the US added 43 gigawatts (GW) of new solar capacity in 2025. This represents a decline from nearly 50 GW installed in 2024, indicating a moderation in the sector’s growth.
The report links the slowdown to policy adjustments under the administration of Donald Trump. Several subsidies and tax incentives that previously supported renewable energy developers were rolled back, affecting investment momentum across the industry.
Another factor cited was the introduction of the One Big Beautiful Bill Act, which reportedly caused disruptions across the solar market. During the year, utility-scale solar installations dropped by about 16%, while community solar projects declined by roughly 25%.
Industry Faces Regulatory and Cost Pressures
Apart from policy changes, the solar sector encountered additional challenges such as tariffs on imported equipment and delays in approvals for large-scale projects.
These developments reflect a broader shift in US energy policy, which has placed increased emphasis on traditional and alternative sources such as oil, natural gas, coal, and nuclear energy. This approach contrasts with the renewable-energy-focused strategy pursued during the presidency of Joe Biden.
Despite the slowdown, solar energy continues to play a central role in expanding the country’s electricity generation capacity. The report notes that solar power and energy storage combined accounted for around 79% of new power capacity additions during the first year of the Trump administration.
Rising electricity demand from artificial intelligence–driven data centres has also helped maintain the competitiveness of solar energy in the broader power market.
Regional Trends in Solar Deployment
In terms of regional activity, Texas led solar capacity expansion with around 11 GW of new installations in 2025. Other states contributing significantly included Indiana, Florida, Arizona, Ohio, Utah and Arkansas.
The report also highlighted that more than two-thirds of new solar installations were located in states that supported Trump in the election, indicating continued demand for renewable energy across diverse regions.
Summary
Solar power expansion in the United States slowed in 2025, with new installations falling to 43 GW from nearly 50 GW in 2024. The decline has been linked to policy shifts, the removal of incentives for renewable developers, and regulatory hurdles affecting project approvals. Despite these challenges, solar energy and storage still accounted for the majority of new electricity generation capacity, highlighting the sector’s continued importance in the US energy mix.
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