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

WASHINGTON, D.C. — The U.S. energy storage industry installed a record 20.2 gigawatt-hours (GWh) of new capacity in Q2, bringing total installations in the first half of 2026 to 30.8 GWh, according to the U.S. Energy Storage Market Outlook Q3 2026 (ESMO) released today by the Solar Energy Industries Association (SEIA) and Benchmark Mineral Intelligence.

Utility-scale energy storage capacity has nearly doubled from 88 GWh to 165 GWh in the first 18 months of the Trump administration, as grid operators, utilities and energy buyers turn to storage to strengthen reliability and meet rising electricity demand.

Demand for energy storage is outpacing expectations, prompting a 11.5% increase in the report’s forecast through 2030 to 683 GWh. The upward revision comes as the industry continues to set deployment records, with more than 10% of all energy storage capacity currently installed in the U.S. coming online in Q2 alone.

“This record growth highlights that storage is a powerful reliability tool that strengthens our energy security, meets rising demand and puts downward pressure on electricity bills,” said Tim Pawlenty, president and CEO of the Solar Energy Industries Association.

More than 74% of the energy storage capacity installed in Q2 was built in states won by President Donald Trump in 2024, led largely by Arizona, Texas, and Utah. Arizona led the country with 6.2 GWh of new storage installations in Q2, the strongest quarter for any one state on record. Arizona, which has the nation’s fourth-largest solar market, is increasingly pairing its abundant solar resources with storage to capture more homegrown power, meet rising demand, and help keep electricity costs down.

“Energy storage is no longer just a California and Texas story anymore,” said Shan Tomouk, BESS & Energy Lead at Benchmark Minerals. “We’re seeing strong pipeline growth in Arizona, Nevada, Oregon, Colorado and several other states.”

Battery energy storage supplied more electricity to the grid in the first eight months of 2026 than in all of 2025. During periods of extreme heat in states like Texas and California, storage has helped provide power when demand is highest, supporting grid reliability and helping protect consumers from price spikes. Texas and California installed 3.8 GWh and 3.6 GWh of storage, respectively, in Q2.

The U.S. also set domestic manufacturing records, with the opening of two new battery cell manufacturing facilities in Ohio and Tennessee, and a new 50 GWh battery module facility in Texas. Together, these facilities bring U.S. battery cell and module manufacturing capacity to record highs, ensuring that more of the batteries being deployed to strengthen the grid are made in the United States.

Utility-scale projects accounted for the vast majority of Q2 installations, with 17.9 GWh deployed, followed by 1.8 GWh of commercial and industrial storage, and 657 MWh of residential storage.

Learn more at SEIA.org/esmo.

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About SEIA®: 

The Solar Energy Industries Association® (SEIA) is leading the transformation to a clean energy economy. SEIA works with its 1,200 member companies and other strategic partners to fight for policies that create jobs in every community and shape fair market rules that promote competition and the growth of reliable, low-cost solar power. Founded in 1974, SEIA is the national trade association for the solar and solar + storage industries, building a comprehensive vision for the Solar+ Decade through research, education and advocacy. Visit SEIA online at www.seia.org and follow @SEIA on Twitter, LinkedIn, and Instagram.