REPORT: U.S. Adds 20 GWh of Energy Storage Capacity in Q2, Largest Quarter on Record

The U.S. installed a record 20.2 gigawatt-hours of new battery storage capacity in the second quarter of the year, bringing the total for the first half of the year to 30.8 gigawatt-hours, according to a new industry report from the Solar Energy Industries Association and Benchmark Mineral Intelligence. Battery storage lets the grid save up power, often from solar panels, and release it later when demand is high. Total utility-scale storage capacity has nearly doubled over the past year and a half, from 88 to 165 gigawatt-hours, as utilities lean on batteries to keep the grid steady and handle rising electricity demand.

Most of the growth happened in Arizona, Texas, and Utah, with Arizona alone adding 6.2 gigawatt-hours, the strongest quarter for any single state on record. During recent heat waves in Texas and California, stored power helped meet demand at peak times, which can limit price spikes. The report also notes new battery manufacturing plants opening in Ohio, Tennessee, and Texas, adding to U.S.-made battery supply.

For homeowners, this growth is mostly happening at the grid level, not in individual houses. Of the new capacity installed this quarter, the vast majority went to utility-scale projects, with a much smaller share going to home battery systems. Still, more grid-level storage can mean a steadier power supply and, in theory, less pressure on electricity prices during high-demand periods, though what shows up on any individual bill will depend on local utilities and state policy.