The Wever battery energy storage system (BESS) sits adjacent to the 150-megawatt (MW) Wever solar project in southeast Iowa. The Wever BESS facility can store 99 MW of power generated from the nearby solar field or from other sources. The storage system went online in early 2026 and can power the equivalent of 100,000 homes for four hours.
The Wever BESS facility has an estimated 20-year lifespan. Operators monitor the site 24 hours a day, seven days a week, which allows them to respond immediately to any changes in performance.
Along with three other projects – Lansing, Golden Plains and Whispering Willow North – the Wever BESS facility will bring our planned battery storage capacity in Iowa to approximately 400 MW.
How does battery storage work?
Battery storage systems charge from the grid when energy demand is low or directly from wind or solar projects when excess renewable energy is abundant. They discharge energy when demand increases, such as on hot summer or cold winter days. The ability to capture and store energy to use when needed improves the overall benefit of renewable resources.
