National Solar Capacity Ranking: 32nd
National Energy Storage Capacity Ranking: 22nd
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.
1,952 MWdc
452 MWh
32nd (38th in 2025 additions)
367,595 homes
17.79%
722
56 (3 Manufacturers, 29 Installers/Developers, 24 Others)
$3.2 billion
895 MW over the next 5 years (ranks 42nd)
17,920
Maine has an emerging energy storage market supported by strong solar growth and increasing deployment of battery systems.
While the market continues to develop, ongoing solar deployment and supportive policy efforts are expected to drive additional storage growth. Energy storage is playing an increasing role in enhancing grid flexibility and supporting Maine’s transition to a cleaner energy system.