National Solar Capacity Ranking: 21st
National Storage Capacity Ranking: 16th
Updated September 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.
3,529 MWdc
1.2 GWh
21st (19th in 2025 additions)
594,740 homes
7.18%
182
181 (55 Manufacturers, 73 Installers/ Developers, 53 Others)
$4.7 billion
4,521 MW over the next 5 years (ranks 15th)
21,697
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.