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SOLAR FARMS · BATTERY STORAGEHappy Hollow CSG Hybrid
Happy Hollow CSG Hybrid is a 8.3 MW operating solar and battery storage plant in Worcester County, Massachusetts, operated by REA Investments, LLC. Its batteries store up to 7 MWh.
Generators
Each generating unit EIA lists at this plant.
| Unit | Technology | Capacity | Status |
|---|---|---|---|
| HHPV | Solar Photovoltaic | 5.0 MW | |
| HHESS | Batteries | 3.3 MW 7 MWh |
Plant details
- Operator
- REA Investments, LLC
- Location
- Worcester County, Massachusetts
- Balancing authority
- ISNE
- Sector
- IPP Non-CHP
- Capacity
- Operating: 8.3 MW
- First unit online
- Oct 2019
- EIA plant ID
- 62652
Location
42.6070, -72.0453
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- Integrys MA Solar, LLC - Ashburnham SiteSolar farms · 2.9 MW · 5.3 mi
- Dept of Corrections NCCI WindWind farms · 3.4 MW · 5.7 mi
- TempletonSolar farms · 3.0 MW · 6.0 mi
- Winchendon Landfill SolarSolar farms · 2.0 MW · 6.1 mi
- Barton Acres Solar, LLC CSGSolar farms · 1.0 MW · 6.5 mi
Source: U.S. Energy Information Administration, Form EIA-860M, September 2026. Planned dates are targets reported by the developer and often change. Report a problem