Solar and wind accounted for more than 88% of new US generating capacity added in 2025, led by solar with over 72%, according to SUN DAY Campaign analysis of Federal Energy Regulatory Commission data.
The SUN DAY Campaign said solar totalled 26.6GW of new capacity in 2025 while wind added 5.8GW, noting solar has led monthly additions for 28 consecutive months.
FERC data reviewed by the organisation show utility-scale solar capacity reached 164.5GW, surpassing wind, hydropower and nuclear power, while wind and solar together now represent 24.1% of total installed capacity.
Solar accounted for 83.2% of new capacity in December 2025 with 993MW added, alongside the 200MW Top Hat Wind Energy Center in Illinois.
Over the next three years, FERC forecasts 86GW of new solar capacity and 20GW of wind, with total renewable additions projected at 106GW.
The projections indicate solar capacity will surpass coal while fossil fuels and nuclear combined are expected to decline by 34GW.
“FERC’s data confirm that very strong growth in electrical generation by solar and wind dominated the first year of the Trump Administration,” said Ken Bossong, executive director of the SUN DAY Campaign.
“Equally important, the trend lines are on track to continue during the next three years notwithstanding efforts by the White House to reverse course.”