Preliminary 2025 facility recordOperating

Dalton, MA · EIA plant 67241

401 South

401 South is a storage power facility in Dalton, MA, with 2 MW of operating capacity.

Operating capacity2 MW2 operating generators
Proposed capacity0 MW0 proposed generators
UtilityMadison Energy Investments LLCEIA-reported operator
Balancing authoritySOCOSouthern Company Services, Inc. - Trans

Capacity profile

Fuel and technology

Nameplate capacity
Operating
Storage1 MW
Solar1 MW
ProposedNo proposed capacity reported
Reported technologiesBatteriesSolar Photovoltaic

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