Alliant Energy has received approval from the Public Service Commission Wisconsin to build two large-scale battery storage projects at two solar PV plants in Wisconsin’s Grant and Wood Counties. The assets will be four-hour duration and add a total of 175 MW.
The Grant County battery energy storage system (BESS) will have a 100 MW output and be integrated with the 200 MW Grant County Solar Project. The PV plant is currently under construction in Potosi, Wisconsin, and is expected to begin commercial operations at the beginning of 2024.
The Wood County BESS will have a 75 MW output and be integrated with the 150 MW Wood County Solar Project in Saratoga, Wisconsin, which began commercial operations in 2022.
Alliant has selected FlexGen, an energy storage system integrator, to provide the energy management system and the battery storage hardware for both projects. Both projects also serve to advance Alliant’s “Clean Energy Vision” goals, which pledge to reduce greenhouse gas emissions relative to its 2005 levels by 2030 and eliminate coal from its generation fleet by 2040.