Mount Saint Mary's
Solar power plant · Frederick County, Maryland
Nameplate capacity
14 MW
Rank in Maryland
#43
of 234 plants
In service since
2012
July 2012
Details
- Primary fuel
- Solar
- Technology
- Solar Photovoltaic
- Operator
- Constellation Solar Horizons LLC
- County
- Frederick County
- Generating units
- 1
- Share of state capacity
- 0.10%
- Rank among solar plants in Maryland
- #14 of 187
- EIA plant code
- 57758
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| PV1 | Solar Photovoltaic | 14 MW | 14 MW | 2012 | 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 Maryland
| Domino Sugar Baltimore | Natural gas | 18 MW |
| Biggs Ford Solar Center | Solar | 15 MW |
| Longview Solar | Solar | 14 MW |
| Annapolis Solar Park, LLC | Solar | 12 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 14 MW solar plant and a 14 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 Maryland power plants · What Maryland actually generates