New Solar and Battery Storage Projects to Serve Customers
Facilities will help MGE continue to reduce carbon emissions.
MGE received approval in May to build the Sunnyside Solar Energy Center, a 20-megawatt (MW) solar array and 40-MW battery storage system to be built in Fitchburg. The project will provide locally generated solar energy to MGE's distribution system serving customers.
The 20 MW of solar capacity are expected to generate enough energy to power about 6,000 households. The 40 MW of four-hour battery storage would provide electricity during times when energy demand is greatest and when renewable capacity is insufficient to meet all customer needs.
The solar array is expected to begin serving customers by the end of 2026, and the battery storage system is expected in 2027.
Large-scale battery storage now online
In June, Wisconsin’s first large-scale battery storage installation came online. MGE owns 11 MW of the 110-MW battery storage at the Paris Solar-Battery Park. MGE also owns 20 MW of solar capacity at the facility. The 200-MW solar array in Kenosha County came online in December 2024. MGE’s share of the solar output is expected to generate enough electricity to power about 6,000 homes. These renewable energy projects are part of several in various stages of development.
Learn more about MGE’s ongoing clean energy transition as we work toward net-zero carbon electricity.
published: August 29, 2025
