Where is Happy Hollow CSG Hybrid?

In Worcester 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 Happy Hollow CSG Hybrid?

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

Who owns Happy Hollow CSG Hybrid?

EIA-860M names REA Investments, 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 Happy Hollow CSG Hybrid LLC?

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

Is Happy Hollow CSG Hybrid still running?

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

Happy Hollow CSG Hybrid

Happy Hollow CSG Hybrid is a 8 MW solar farm in Worcester County, Massachusetts, operated by REA Investments, LLC. EIA-860M lists 2 generating units here, inside ISO New England. Its units 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: 8.3 MW; 8.3 MW net summer
Generating units: 2
In service: 2019
EIA plant ID: 62652

Where it is

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County: Worcester County, Massachusetts
Coordinates: 42.607, -72.0453
Balancing authority: ISNE
Sector: IPP Non-CHP

Units, technology and status

Operator of record: REA Investments, LLC
Primary energy source: Solar
Technologies: Batteries, Solar Photovoltaic
Status: Operating

This site runs on more than one energy source. EIA-860M capacity splits: Solar 5 MW, Battery 3 MW. It is filed here under Solar, the source with the most capacity.

Every plant REA Investments, LLC reports to EIA →

Happy Hollow CSG Hybrid: FAQ

Where is Happy Hollow CSG Hybrid?: In Worcester 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 Happy Hollow CSG Hybrid?: 8 MW of nameplate capacity across 2 units, as of the EIA-860M release for 2026-07.
Who owns Happy Hollow CSG Hybrid?: EIA-860M names REA Investments, 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 Happy Hollow CSG Hybrid LLC?: Probably, but EIA-860M does not say. The survey records a plant name and a reporting entity — REA Investments, 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 "Happy Hollow CSG Hybrid LLC" usually means this site. This page shows only what EIA files, and does not assert a corporate structure it cannot see.
Is Happy Hollow CSG Hybrid still running?: EIA-860M files it as "Operating" for 2026-07. Statuses change monthly, and this page follows the monthly release.