As of March 31, 2026, the Federal Energy Regulatory Commission (FERC) found that solar developers installed 26.5 GW in 2025, down 22% from the 33.8 GW they installed the previous year in 2024. [1] Despite this, solar still led all other sources in 2025 installations. [2] According to FERC, solar makes up 12.2% of installed generating capacity in the US, behind natural gas at 42.2% and coal at 14.3%. According to the Solar Energy Industries Association, solar installations remained largely the same year over year, but volumes fell by almost 40% in the fourth quarter. By the end of 2025, installations totaled just under 35 GW as many utility-scale projects were delayed into 2026 and 2027. FERC data suggests that natural gas added fewer units in 2025 at 84, compared with 122 the previous year, despite a 1.5 GW increase in installed capacity. Wind capacity grew with 5.7 GW of additions in 2025 compared to 4.5 GW the year before. No new nuclear capacity came online in 2025.

[1] https://cms.ferc.gov/media/energy-infrastructure-update-december-2025

[2] https://seia.org/research-resources/solar-market-insight-report-2025-year-in-review/