National Solar Capacity Ranking: 19th
National Storage Capacity Ranking: 15th
Updated June 2026
SEIA’s Major Solar and Storage Projects List is a database of all U.S. ground-mounted solar projects, 1 MW and above, that are either operating, under construction or under development.
3,502 MWdc
1,150 MWh
19th (19th in 2025 additions)
588,906 homes
6.80%
182
181 (55 Manufacturers, 73 Installers/Developers, 53 Others)
$4.6 billion
4,404 MW over the next 5 years (ranks 14th)
21,421
Wisconsin’s energy storage market is expanding alongside strong solar growth, with increasing deployment to support grid reliability and renewable integration.
As solar capacity and investment continue to grow, energy storage is expected to play an increasingly important role in balancing the grid and supporting future clean energy development across the state.