FlexGen has brought two major battery energy storage system (BESS) projects online in partnership with Alliant Energy, strengthening grid reliability across the American Midwest.
The new installations, located in Wisconsin and Iowa, underline the companies’ shared focus on dependable power supply and optimising the performance of co‑located renewable generation.
The Wood County site in Wisconsin provides 75MW of storage capacity, while the Wever facility in Iowa adds a further 99MW. Both systems capture electricity produced by nearby solar farms and other generation sources, storing it until demand on the grid increases. This approach helps smooth the variability of renewable output and ensures power can be delivered during peak periods.
FlexGen designed and built the battery systems, integrating its HybridOS™ energy management platform to provide intelligent controls, real‑time optimisation and enhanced operational visibility. These capabilities support grid resilience and help utilities plan for long‑term load growth.
“Our mission is to equip utilities and the communities they serve with solutions to harness, store, and distribute the energy that is vital to our daily lives and economies,” said Jason Rislov, Senior Vice President of Operations at FlexGen. “As grid conditions grow more dynamic, battery storage gives companies like Alliant Energy the confidence to deliver energy as promised while integrating renewable generation, strengthening grid resiliency, and meeting long-term load growth.”
Together, the Wood County and Wever projects highlight the expanding role of software‑enabled storage in supporting flexible, reliable grid operations and preparing energy networks for future demand.
Image: The Wood County BESS installation. Credit: Alliant.
