The United States added 50,344 MW of clean power capacity in 2025, marking the strongest year on record for the sector and accounting for more than 90% of all new electricity capacity connected to the grid, according to the latest market report from the American Clean Power Association (ACP).

The figures come from ACP’s Q4 2025 Clean Power Quarterly Market Report, which shows that developers brought 18.6 GW of new utility-scale solar, wind and energy storage online in the fourth quarter alone, pushing annual installations above 50 GW, enough electricity to power more than 6.9 million homes.

Together, solar, wind and battery storage represented 90.5% of all new power capacity added in 2025 and more than 80% of capacity additions over the past five years, according to ACP and the U.S. Energy Information Administration.

Battery storage recorded the strongest growth among clean technologies. Installations rose 41% year over year, exceeding 2024 deployment levels by nearly 4 GW and marking another record year for the sector.

“This record year shows that our industry is resilient and delivers the reliable, affordable energy that Americans need,” said JC Sandberg, Chief Policy Officer at ACP. He added that the results reflect the “consistent market and policy environment the industry enjoyed heading into 2025.”

Despite the record deployment, the report highlights emerging challenges for the sector. While the near-term clean power development pipeline reached more than 187.5 GW, its growth slowed during the fourth quarter, with only 2 GW added.

One of the main warning signs is the decline in power purchase agreements (PPAs), which are often considered a key indicator of future project development. PPA activity fell 27% year over year, suggesting that clean power deployment could slow between 2028 and 2030.

According to ACP, many buyers postponed procurement decisions in the second half of 2025 while awaiting greater clarity on federal policies and tax credit eligibility rules.

“Current policy instability is beginning to impact investor confidence and negatively affect project timelines at a time when demand is surging,” Sandberg said, warning that limiting new clean energy development could increase energy costs for households and businesses.

The report also highlights mixed trends across technologies. While solar, wind and storage continued to expand, no new offshore wind capacity came online in the fourth quarter, and the sector’s development pipeline contracted following project cancellations.

At the same time, clean power deployment continues to expand across the country. Projects are now operational in all 50 U.S. states, with 19 states increasing their clean power capacity by more than 20% in 2025. Among them, Kentucky recorded one of the fastest growth rates, expanding its capacity by 188% and entering the top ten states for solar installations in 2025.

Looking ahead, the sector’s pipeline remains significant, with 35 states hosting more than 1 GW of clean power projects under development, underscoring the continued role of renewables in meeting the country’s growing electricity demand.