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Alliant Energy's 99-megawatt battery energy storage system (BESS) in Sheboygan, Wisconsin, is expected to be operational by the end of 2026 following construction that began in spring 2025. The BESS will provide enough power for over 100,000 homes for four hours.

Initially, construction was scheduled for 2024 but was delayed. The project is part of Alliant's Clean Energy Blueprint, which includes goals to reduce greenhouse gas emissions by 50% by 2030. Other related projects in the area include the Onion River Solar Project and a 20-megawatt energy storage system in Columbia County, which will begin construction in spring 2026.