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Battery storage facilities in Maine

7 battery storage facilities in Maine, totaling 217 MW of nameplate capacity. Source: EIA.

Development pipeline planned & under construction

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Planned pipeline — new additions by fuel type
Battery storageCumulative

Source: U.S. EIA; The Orbit Desk

Largest next additions planned & under construction

South Portland ESS, LLC
Battery storage · South Portland, Maine · Under construction · exp. 2026
10 MW
Sanford ESS, LLC
Battery storage · Sanford, Maine · Under construction · exp. 2026
5 MW

All battery storage plants in Maine

Cross Town Energy Storage
Battery storage · Gorham, Maine · Operating · COD 2025
175 MW
Bonny Eagle
Battery storage · Hollis, Maine · Operating · COD 1910
15 MW
South Portland ESS, LLC
Battery storage · South Portland, Maine · Under construction · exp. 2026
10 MW
Sanford ESS, LLC
Battery storage · Sanford, Maine · Under construction · exp. 2026
5 MW
Madison ESS
Battery storage · Madison, Maine · Operating · COD 2019
5 MW
Rumford ESS
Battery storage · Rumford, Maine · Operating · COD 2021
5 MW
Madison BTM
Battery storage · Madison, Maine · Operating · COD 2020
2 MW

Source: U.S. Energy Information Administration (EIA-860M)