Madison Gas and Electric has received approval from the Public Service  Commission of Wisconsin (PSCW) to build a 20-megawatt (MW) solar array and 40-MW battery storage system in Fitchburg. Known as the Sunnyside Solar Energy Center, the project will provide locally generated solar energy to MGE's distribution system.

The new energy center will be located off Whalen Road. The 20 MW of solar capacity is expected to generate enough electricity annually to serve about 6,000 households. The 40 MW of four-hour battery storage will provide electricity during times when energy demand is greatest and when renewable capacity is insufficient to meet all customer needs. EDF Renewables is the project developer. The solar array is expected to begin serving customers in 2026, with the battery storage expected in 2027.