US Storage Installs Hit a Record 20.2 GWh in Q2 and 74% Landed in Trump States
- Analysis Energy Storage Utility-Scale BESS
Marin Holt
- 0
- 8 minutes read
- Q2 2026 installs: 6.7 GW / 20.2 GWh, largest quarter on record
- First half 2026: 30.8 GWh, up from 9.7 GWh in Q1
- Arizona: 6.2 GWh, best quarter by any state
- Utility-scale fleet: 88 GWh to 165 GWh in 18 months
- 2030 forecast: raised 11.5% to 683 GWh
The US battery fleet just had its biggest quarter on record. Developers brought 6.7 GW and 20.2 GWh of new storage online in the second quarter of 2026. The figures come from the Q3 2026 US Energy Storage Market Outlook, published by the Solar Energy Industries Association and Benchmark Mineral Intelligence. That is more than double the 9.7 GWh added in Q1. It puts the first half of the year at 30.8 GWh.
The more interesting number is not the total. It is where the batteries went. More than 74% of the capacity installed in Q2 was built in states President Trump won in 2024.
Arizona ran the table
Arizona installed 6.2 GWh in Q2. No state has ever deployed that much storage in a single quarter. Texas added 3.8 GWh. California added 3.6 GWh. Arizona beat both of the markets that have defined US storage for a decade.
That ordering was not the one federal forecasters expected. In February, the Energy Information Administration projected 24 GW of utility-scale battery additions for 2026, up from a record 15 GW in 2025. It put Texas at 53% of that pipeline, or 12.9 GW, with California at 14% and Arizona at 13%. The measures differ, since EIA counts planned annual power and SEIA counts installed quarterly energy. Arizona still arrived ahead of schedule.
Utility-scale projects carried the quarter at 17.9 GWh, up from 7.8 GWh in Q1. Seven individual projects of 1,000 MWh or larger came online in Arizona, California and Utah. Standalone systems took 56% of the new utility-scale capacity. Solar-paired systems took the other 44%.
The distributed segments were smaller but not flat. Residential added 657 MWh. Commercial and industrial added 1.8 GWh. SEIA attributes most of that industrial figure to data center load.
“Energy storage is no longer just a California and Texas story anymore,” said Shan Tomouk, BESS and energy lead at Benchmark Mineral Intelligence. He pointed to pipeline growth in Arizona, Nevada, Oregon and Colorado.
The fleet nearly doubled in 18 months
Utility-scale storage capacity in the US grew from 88 GWh to 165 GWh over the first 18 months of the second Trump administration. Batteries also delivered more electricity to the grid in the first eight months of 2026 than in all of 2025.
SEIA and Benchmark raised their 2030 forecast by 11.5% to 683 GWh. A revision of that size is rare in a mature quarterly outlook. It says the analysts underestimated demand, not policy.
Manufacturing moved too. LG Energy Solution opened battery cell plants in Ohio and Tennessee. Tesla opened a 50 GWh battery module factory in Texas.
Why It Matters
Storage now grows fastest in the places least interested in the climate case for it. Arizona, Texas and Utah do not build batteries to hit a renewable portfolio standard. They build them for three plainer reasons. Peak demand is rising. Interconnection queues make new thermal generation slow. And a battery is the quickest dispatchable asset a developer can put behind a point of interconnection that already exists.
That shifts the political risk on the asset class. A technology that lands 74% of its capacity in states that voted Republican is harder to legislate against than one concentrated in California. It also shifts the reliability argument. Batteries covered evening peaks during summer heat in Texas and California this year. Utility regulators respond to that.
The exposure sits upstream. China dominates lithium cell supply. Executive Order 14420 hands the Department of Energy authority over foreign-produced grid equipment, and it names battery energy storage systems and grid-connected inverters directly. DOE must publish implementing rules by 24 December 2026. A record deployment quarter and an unwritten equipment restriction now point at the same supply chain from opposite directions.
Critical Perspective
The 74% figure is doing more rhetorical work than analytical work. Storage follows solar irradiance, cheap flat land and market structure. Arizona, Texas and Utah would sit at the top of this table under any administration, because that is where the sun, the land and the ERCOT and WECC price signals are. SEIA is a trade association with a direct interest in showing Republican lawmakers that batteries are their constituents’ industry. The report does not separate the projects financed under prior policy from anything this administration did.
The 20.2 GWh is also an installation number, not an operating one. Capacity counted as installed in Q2 can wait months for commissioning and full interconnection before it delivers a megawatt-hour to anyone. SEIA does not publish the gap between mechanical completion and commercial operation. Until it does, a record install quarter and a record delivery quarter are two different claims.
The forecast raise carries the largest unpriced risk. Lifting the 2030 outlook 11.5% to 683 GWh assumes the Executive Order 14420 rules land narrowly. DOE has not written them yet. If those rules reach cell-level content rather than control systems, the Chinese supply chain that produced this record quarter becomes the binding constraint on the forecast. Neither SEIA nor Benchmark prices that downside into the headline number.
Sources
- SEIA – REPORT: U.S. Adds 20 GWh of Energy Storage Capacity in Q2, Largest Quarter on Record
- Energy-Storage.News – US utility-scale battery energy storage capacity almost doubled during first 18 months of Trump’s second term
- Solar Power World – Q2 was biggest quarter ever for energy storage installs in the US
- U.S. Energy Information Administration – New U.S. electric generating capacity expected to reach a record high in 2026
