GSPP Terrawatt Westfield LLC CSG
Solar power plant · Hampden County, Massachusetts
Details
- Primary fuel
- Solar
- Technology
- Solar Photovoltaic
- Operator
- Green Street Power Partners
- County
- Hampden County
- Generating units
- 1
- Share of state capacity
- 0.03%
- Rank among solar plants in Massachusetts
- #169 of 531
- EIA plant code
- 62825
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| WESTF | Solar Photovoltaic | 3.6 MW | 3.6 MW | 2019 | Operating |
Nameplate is the maximum rated output; summer capacity is what the unit can reliably deliver on a hot day, which is typically lower.
Similarly sized plants in Massachusetts
| Onyx - Brockton Thatcher Landfill Solar | Solar | 3.7 MW |
| CoreSite - Somerville | Natural gas | 3.6 MW |
| Hatfield Solar PV | Solar | 3.6 MW |
| Redbridge | Hydro | 3.6 MW |
About this data
From EIA’s inventory of operable generators, May 2026 release. Capacity is nameplate — the maximum rated output of the equipment, not what the plant actually generates over a year, which depends on how often it runs. A 3.6 MW solar plant and a 3.6 MW nuclear plant have the same entry here and produce very different amounts of electricity.
“In service since” is the earliest in-service date among the units still listed, so a site rebuilt around newer equipment can read as younger than the site itself. All Massachusetts power plants · What Massachusetts actually generates