Where is Mammoth North Solar?

In Starke County, Indiana (IN). 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 Mammoth North Solar?

400 MW of nameplate capacity across 1 unit, as of the EIA-860M release for 2026-07.

Who owns Mammoth North Solar?

EIA-860M names Mammoth North, 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 Mammoth North Solar LLC?

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

Is Mammoth North Solar still running?

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

Mammoth North Solar

Mammoth North Solar is a 400 MW solar farm in Starke County, Indiana, operated by Mammoth North, LLC. EIA-860M lists 1 generating unit here, inside PJM. 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: 400 MW; 400 MW net summer
Generating units: 1
In service: 2024
EIA plant ID: 65957

Where it is

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County: Starke County, Indiana
Coordinates: 41.1993, -86.6338
Balancing authority: PJM
Sector: IPP Non-CHP

Units, technology and status

Operator of record: Mammoth North, LLC
Primary energy source: Solar
Technologies: Solar Photovoltaic
Status: Operating

Every plant Mammoth North, LLC reports to EIA →

Mammoth North Solar: FAQ

Where is Mammoth North Solar?: In Starke County, Indiana (IN). 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 Mammoth North Solar?: 400 MW of nameplate capacity across 1 unit, as of the EIA-860M release for 2026-07.
Who owns Mammoth North Solar?: EIA-860M names Mammoth North, 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 Mammoth North Solar LLC?: Probably, but EIA-860M does not say. The survey records a plant name and a reporting entity — Mammoth North, 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 "Mammoth North Solar LLC" usually means this site. This page shows only what EIA files, and does not assert a corporate structure it cannot see.
Is Mammoth North Solar still running?: EIA-860M files it as "Operating" for 2026-07. Statuses change monthly, and this page follows the monthly release.