Where is Old Frontier Solar III?

In Franklin 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 Old Frontier Solar III?

4 MW of nameplate capacity across 2 units, as of the EIA-860M release for 2026-07.

Who owns Old Frontier Solar III?

EIA-860M names Old Frontier Solar III PV, 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 Old Frontier Solar III LLC?

Probably, but EIA-860M does not say. The survey records a plant name and a reporting entity — Old Frontier Solar III PV, 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 "Old Frontier Solar III LLC" usually means this site. This page shows only what EIA files, and does not assert a corporate structure it cannot see.

Is Old Frontier Solar III still running?

EIA-860M files it as "Operating" for 2026-07. Statuses change monthly, and this page follows the monthly release.

Old Frontier Solar III

Old Frontier Solar III is a 4 MW battery storage project in Franklin County, Massachusetts, operated by Old Frontier Solar III PV, LLC. EIA-860M lists 2 generating units here, inside ISO New England. Its units entered service in 2022.

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: 4 MW; 4 MW net summer
Generating units: 2
In service: 2022
EIA plant ID: 68069

Where it is

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County: Franklin County, Massachusetts
Coordinates: 42.494, -72.6225
Balancing authority: ISNE
Sector: IPP Non-CHP

Units, technology and status

Operator of record: Old Frontier Solar III PV, LLC
Primary energy source: Battery
Technologies: Batteries, Solar Photovoltaic
Status: Operating

This site runs on more than one energy source. EIA-860M capacity splits: Battery 2 MW, Solar 2 MW. It is filed here under Battery, the source with the most capacity.

Every plant Old Frontier Solar III PV, LLC reports to EIA →

Old Frontier Solar III: FAQ

Where is Old Frontier Solar III?: In Franklin 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 Old Frontier Solar III?: 4 MW of nameplate capacity across 2 units, as of the EIA-860M release for 2026-07.
Who owns Old Frontier Solar III?: EIA-860M names Old Frontier Solar III PV, 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 Old Frontier Solar III LLC?: Probably, but EIA-860M does not say. The survey records a plant name and a reporting entity — Old Frontier Solar III PV, 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 "Old Frontier Solar III LLC" usually means this site. This page shows only what EIA files, and does not assert a corporate structure it cannot see.
Is Old Frontier Solar III still running?: EIA-860M files it as "Operating" for 2026-07. Statuses change monthly, and this page follows the monthly release.