Groton BESS 2
Groton BESS 2 is a 2 MW battery storage project in Middlesex County, Massachusetts, operated by Groton BESS 2 LLC. EIA-860M lists 1 generating unit here, inside ISO New England. Its unit entered service in 2024.
As of 2026-07 (inventory dated 2026-07-31) · EIA-860M Preliminary Monthly Electric Generator Inventory · eia.gov/…/july_generator2026.xlsx · eia.gov/…/eia860m
- Nameplate capacity
- 2 MW
- 2 MW net summer
- Generating units
- 1
- In service
- 2024
- EIA plant ID
- 67162
Where it is
Loading map…
- County
- Middlesex County, Massachusetts
- Coordinates
- 42.6157, -71.5778
- Balancing authority
- ISNE
- Sector
- IPP Non-CHP
Units, technology and status
- Operator of record
- Groton BESS 2 LLC
- Primary energy source
- Battery
- Technologies
- Batteries
- Status
- Operating
Groton BESS 2: FAQ
- Where is Groton BESS 2?
- In Middlesex County, Massachusetts (MA). The map on this page is placed at the coordinates EIA files for the plant, which locate the site rather than any individual unit.
- How big is Groton BESS 2?
- 2 MW of nameplate capacity across 1 unit, as of the EIA-860M release for 2026-07.
- Who owns Groton BESS 2?
- EIA-860M names Groton BESS 2 LLC as the reporting entity. That is the operator of record on the survey, which is not always the ultimate owner.
- Is this the same as Groton BESS 2 LLC?
- Probably, but EIA-860M does not say. The survey records a plant name and a reporting entity — Groton BESS 2 LLC here — not the project company that holds the asset. Project companies are commonly registered as an LLC carrying the plant's name, so a search for "Groton BESS 2 LLC" usually means this site. This page shows only what EIA files, and does not assert a corporate structure it cannot see.
- Is Groton BESS 2 still running?
- EIA-860M files it as "Operating" for 2026-07. Statuses change monthly, and this page follows the monthly release.