Renewable energy sources delivered almost 26% of US electricity in the first 10 months of 2025 as solar set fresh generation records, according to analysis by the Sun Day Campaign.
The group said monthly data showed solar accounted for just over 9% of total output over the period while wind contributed 9.9%.
Combined wind and solar generation increased by 12.4% year-on-year and made up 18.9% of US electrical production, the analysis added.
The Sun Day Campaign stated that solar-generated electricity in January–October exceeded hydropower by more than 67% and out-produced hydro, biomass and geothermal combined.
Solar capacity additions also led the market, with 19,477.6MW of new utility-scale installations and 4837.7MW of small-scale systems added since January.
Battery storage grew by 45% in the same period, adding 12,150.3MW, while further additions of 21,940.4MW are planned over the next year, the group said.
Wind capacity increased by 3796MW, with a forecast pipeline of 9567MW onshore and 800MW offshore in the coming 12 months.
Natural gas capacity rose by 3479.6MW, while coal capacity fell by 3241.1MW and nuclear additions totalled 46MW, according to the analysis.
The Sun Day Campaign said all net new generating capacity in 2026 may come from renewables and battery storage.
“It is clear that – notwithstanding the roadblocks created by the Trump administration – growth by renewable energy sources and battery storage has greatly outpaced fossil fuels and nuclear power,” said Sun Day Campaign executive director Ken Bossong.
He added that renewables and batteries could account for 100% of net new capacity additions next year.