Merck - Upper Gwynedd Solar Array
Solar power plant · Montgomery County, Pennsylvania
Details
- Primary fuel
- Solar
- Technology
- Solar Photovoltaic
- Operator
- Merck - Upper Gwynedd Solar Array
- County
- Montgomery County
- Generating units
- 1
- Share of state capacity
- 0.00%
- Rank among solar plants in Pennsylvania
- #59 of 75
- EIA plant code
- 61198
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| SA-1 | Solar Photovoltaic | 1.5 MW | 1.5 MW | 2011 | 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 Pennsylvania
| Juniata Locomotive Shop | Natural gas | 1.5 MW |
| Liverpool Solar Partners | Solar | 1.5 MW |
| Pickering Solar | Solar | 1.5 MW |
| University Park Solar | Solar | 1.5 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 1.5 MW solar plant and a 1.5 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 Pennsylvania power plants · What Pennsylvania actually generates