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Iberdrola kicks off its first large-scale battery project in the US
Michelle Lewis | Jul 2 2026 - 3:33 pm PT
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Photo: Iberdrola
Spanish renewable energy and electricity giant Iberdrola is constructing its first battery energy storage project in the US as utilities race to add more storage to strengthen the grid.
The company is building the Shutler battery project in Gilliam County, in north-central Oregon. When it comes online in 2027, it will have a power capacity of 41 megawatts (MW) and store up to 82 megawatt-hours (MWh) of electricity.
The 41 MW/82 MWh system is a two-hour battery, meaning it can deliver its full 41 MW output for about two hours before it needs to recharge. That’s a common duration for utility-scale batteries that shift excess renewable energy to periods of higher demand and help stabilize the grid.
Avangrid, Iberdrola’s US subsidiary, already has around 3,000 MW of generation capacity in the Pacific Northwest.<br>Advertisement - scroll for more content
Battery storage has become one of the fastest-growing segments of the US power sector because it helps utilities squeeze more value out of renewable energy while improving grid reliability.
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Author
Michelle Lewis
michelle0728
Michelle Lewis is a writer and editor on Electrek and an editor on DroneDJ, 9to5Mac, and 9to5Google. She lives in White River Junction, Vermont. She has previously worked for Fast Company, the Guardian, News Deeply, Time, and others. Message Michelle on Twitter or at michelle@9to5mac.com. Check out her personal blog.
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