10/01/2026
The U.S. energy storage market reached a record 18.9 GWh of deployments in Q2 2026, highlighting the growing role of batteries in meeting rising electricity demand.
According to Wood Mackenzie and the American Clean Power Association (ACP), the market added 5.4 GW of storage capacity, with energy capacity rising 16% year over year despite a 7% decline in power capacity.
Utility-scale storage led the market, accounting for 4.7 GW and 17.6 GWh of deployments. Longer-duration systems, including four-hour batteries, are increasingly being adopted to support grid reliability and address localized constraints.
Residential storage also expanded, adding 676 MW and nearly 1.2 GWh, with energy capacity up 48%. Looking ahead, Wood Mackenzie expects U.S. storage capacity to grow more than 50% over the next five years, reaching 207 GW and 715 GWh by 2031, driven partly by expanding AI data center demand.
Wood Mackenzie and ACP report expanding system durations and data center expansion continue to lift the long-term domestic outlook.