South Portland ESS, LLC
South Portland, Maine
- Capacity
- 10 MW
- Status
- Under construction
- Fuel
- Battery storage
- Technology
- Batteries
- Operator
- South Portland ESS, LLC
- City
- South Portland
- County
- Cumberland County
- State
- Maine
- Expected online
- December 2026
- Balancing authority
- ISNE
South Portland ESS, LLC is a 10 MW battery storage power plant in South Portland, Maine. Operated by South Portland ESS, LLC, it is under construction with an expected online date of December 2026. The facility is located in Cumberland County, within the ISNE balancing authority.
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Source: U.S. Energy Information Administration (EIA-860M)