CPV St Charles Energy Center
Natural gas power plant · Charles County, Maryland
Nameplate capacity
775 MW
Rank in Maryland
#7
of 234 plants
In service since
2017
February 2017
Details
- Primary fuel
- Natural gas
- Technology
- Natural Gas Fired Combined Cycle
- Operator
- CPV Maryland LLC
- County
- Charles County
- Generating units
- 3
- Share of state capacity
- 5.83%
- Rank among natural gas plants in Maryland
- #5 of 15
- EIA plant code
- 56846
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| STGEN | Natural Gas Fired Combined Cycle | 328 MW | 304 MW | 2017 | Operating |
| GTG1 | Natural Gas Fired Combined Cycle | 224 MW | 215 MW | 2017 | Operating |
| GTG2 | Natural Gas Fired Combined Cycle | 224 MW | 214 MW | 2017 | 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
| Key | Natural gas | 831 MW |
| Essential Power Rock Springs LLC | Natural gas | 796 MW |
| Herbert A Wagner | Other | 774 MW |
| Conowingo | Hydro | 531 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 775 MW solar plant and a 775 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