GMP Solar - Williamstown
Solar power plant · Orange County, Vermont
Nameplate capacity
5.0 MW
Rank in Vermont
#38
of 117 plants
In service since
2016
December 2016
Details
- Primary fuel
- Solar
- Technology
- Solar Photovoltaic
- Operator
- Green Mountain Power Corp
- County
- Orange County
- Generating units
- 1
- Share of state capacity
- 0.56%
- Rank among solar plants in Vermont
- #9 of 53
- EIA plant code
- 60877
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| GMPSN | Solar Photovoltaic | 5.0 MW | 5.0 MW | 2016 | 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 Vermont
| Elizabeth Mines Solar 1 | Solar | 5.0 MW |
| GMP Solar - Hartford | Solar | 5.0 MW |
| Georgia Ballard BESS | Battery storage | 5.0 MW |
| Marshfield 6 | Hydro | 5.0 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 5.0 MW solar plant and a 5.0 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 Vermont power plants · What Vermont actually generates