U.S. Battery Storage Averaged 70% Annual Growth Over Past Three Years, EIA Reports

Published: Aug 31, 2026 18:41

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U.S. utility-scale battery storage capacity has expanded at an annual average rate of 70% over the last three years, according to the Energy Information Administration's (EIA) latest generator inventory data released on August 7, 2026. By the end of 2025, the U.S. power grid had 43.6 GW of operational battery storage. Operators added another 8.3 GW during the first half of 2026, bringing total installed capacity to nearly 52 GW. Looking ahead, developers anticipate bringing an additional 54 GW online over the next two and a half years, with 14 GW slated for the second half of 2026, 26 GW in 2027, and 14 GW in 2028. The EIA notes that battery deployment continues to track closely with solar buildout, absorbing daytime generation surpluses and discharging during evening peaks.

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