Where is Ashby Duffy CSG Solar Farm?

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 Ashby Duffy CSG Solar Farm?

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

Who owns Ashby Duffy CSG Solar Farm?

EIA-860M names LSE Cassiopeia 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 Ashby Duffy CSG Solar Farm LLC?

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

Is Ashby Duffy CSG Solar Farm still running?

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

Ashby Duffy CSG Solar Farm

Ashby Duffy CSG Solar Farm is a 2 MW solar farm in Middlesex County, Massachusetts, operated by LSE Cassiopeia LLC. EIA-860M lists 1 generating unit here, inside ISO New England. Its unit entered service in 2017.

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: 1.8 MW; 1.8 MW net summer
Generating units: 1
In service: 2017
EIA plant ID: 61399

Where it is

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County: Middlesex County, Massachusetts
Coordinates: 42.68, -71.83
Balancing authority: ISNE
Sector: IPP Non-CHP

Units, technology and status

Operator of record: LSE Cassiopeia LLC
Primary energy source: Solar
Technologies: Solar Photovoltaic
Status: Operating

Every plant LSE Cassiopeia LLC reports to EIA →

Ashby Duffy CSG Solar Farm: FAQ

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