Where is Upper Marlboro 1 CSG?

In Prince Georges County, Maryland (MD). 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 Upper Marlboro 1 CSG?

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

Who owns Upper Marlboro 1 CSG?

EIA-860M names Nautilus Solar Solutions 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 Upper Marlboro 1 CSG LLC?

Probably, but EIA-860M does not say. The survey records a plant name and a reporting entity — Nautilus Solar Solutions 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 "Upper Marlboro 1 CSG LLC" usually means this site. This page shows only what EIA files, and does not assert a corporate structure it cannot see.

Is Upper Marlboro 1 CSG still running?

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

Upper Marlboro 1 CSG

Upper Marlboro 1 CSG is a 2 MW solar farm in Prince Georges County, Maryland, operated by Nautilus Solar Solutions. EIA-860M lists 1 generating unit here, inside PJM. Its unit entered service in 2019.

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: 2019
EIA plant ID: 63075

Where it is

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County: Prince Georges County, Maryland
Coordinates: 38.7892, -76.8009
Balancing authority: PJM
Sector: IPP Non-CHP

Units, technology and status

Operator of record: Nautilus Solar Solutions
Primary energy source: Solar
Technologies: Solar Photovoltaic
Status: Operating

Every plant Nautilus Solar Solutions reports to EIA →

Upper Marlboro 1 CSG: FAQ

Where is Upper Marlboro 1 CSG?: In Prince Georges County, Maryland (MD). 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 Upper Marlboro 1 CSG?: 2 MW of nameplate capacity across 1 unit, as of the EIA-860M release for 2026-07.
Who owns Upper Marlboro 1 CSG?: EIA-860M names Nautilus Solar Solutions 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 Upper Marlboro 1 CSG LLC?: Probably, but EIA-860M does not say. The survey records a plant name and a reporting entity — Nautilus Solar Solutions 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 "Upper Marlboro 1 CSG LLC" usually means this site. This page shows only what EIA files, and does not assert a corporate structure it cannot see.
Is Upper Marlboro 1 CSG still running?: EIA-860M files it as "Operating" for 2026-07. Statuses change monthly, and this page follows the monthly release.