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Preliminary 2025 facility recordProposed

South Portland, ME · EIA plant 64616

South Portland ESS, LLC

South Portland ESS, LLC is a storage power facility in South Portland, ME, with 10 MW of proposed capacity.

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Operating capacity0 MW0 operating generators
Proposed capacity10 MW1 proposed generators
UtilitySouth Portland ESS, LLCEIA-reported operator
Balancing authorityISNEISO New England Inc.

Capacity profile

Fuel and technology

Nameplate capacity
OperatingNo operating capacity reported
Proposed
Storage10 MW
Reported technologiesBatteries

Nearby in ME

Related facilities

ME · 2.3 miRegional Waste Systems13 MW →ME · 3.2 miWestbrook Energy Center Power Plant564 MW →ME · 3.9 miBWC Beech Ridge Brook, LLC5 MW →ME · 4.1 miCape Gas Turbine35 MW →

Source quality

Preliminary facility data

This page uses the EIA-860 2025 Early Release. EIA identifies the release as preliminary, so it should not be used for official state or national aggregation. Capacity is nameplate capacity, not real-time output or annual generation.

Read methodologyEIA-860 source