OER Monarch CSG
Solar power plant · Prince Georges County, Maryland
Nameplate capacity
2.0 MW
Rank in Maryland
#137
of 234 plants
In service since
2021
December 2021
Details
- Primary fuel
- Solar
- Technology
- Solar Photovoltaic
- Operator
- Standard Solar
- County
- Prince Georges County
- Generating units
- 1
- Share of state capacity
- 0.02%
- Rank among solar plants in Maryland
- #94 of 187
- EIA plant code
- 65357
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| OERMN | Solar Photovoltaic | 2.0 MW | 2.0 MW | 2021 | 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
| MO33 CSG | Solar | 2.0 MW |
| Meeting House | Solar | 2.0 MW |
| OER Patuxent CSG | Solar | 2.0 MW |
| Oaks Landfill - ANEM | Solar | 2.0 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 2.0 MW solar plant and a 2.0 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 Maryland power plants · What Maryland actually generates