US Grid-Scale Battery Capacity Reaches Record Highs Amid Residential Decline

US energy storage capacity reached a record 20.2 gigawatt-hours in Q2 2026, driven primarily by utility-scale installations. Total annual capacity is projected to reach 71 gigawatt-hours, representing a 20% year-over-year increase. This expansion is essential for integrating intermittent renewable energy sources into grid.

Conversely, residential battery installations are projected to decline by 16% in 2026. This contraction is attributed to the expiration of federal tax subsidies for home-based storage systems at the end of 2025. Commercial sector growth remains concentrated in data center infrastructure.

Supply chain risks persist as the industry transitions toward domestic manufacturing. Current projects remain heavily reliant on Chinese-made cells, despite new federal tax credit requirements that penalize foreign-sourced components. Domestic manufacturing capacity is not expected to meet total market demand until approximately 2030, creating potential upward pressure on pricing and project costs.