The United States installed a record 6.7 GW of energy-storage power capacity and 20.2 GWh of energy capacity in the second quarter of 2026. Reporting based on the SEIA and Benchmark Mineral Intelligence market outlook says utility-scale projects supplied most of the growth. Large BESS projects require inverters, transformers, switchgear, protection, controls, communications and utility interconnection systems.
The project or development was cross-checked against the linked reporting and an additional source or official organization page. The summary uses the capacities, voltages, quantities, locations and status stated in those sources. Where a project is still proposed, in bidding, under review or awaiting construction, it is described that way rather than as completed.
Electrical scope is limited to equipment or systems directly reported, plus standard system components only when needed to explain the reported installation. Dates and schedules can change as permitting, procurement, engineering and field work progress. The available reports describe the current milestone, not the entire project history.
This article therefore focuses on the newly reported contract, award, commissioning, equipment announcement, training notice or development action. It does not assume future contracts, final costs or completion dates that the sources have not confirmed. Technical ratings are presented in their reported units so readers can distinguish project scale.
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