Keystone Solar
Solar power plant · Lancaster County, Pennsylvania
Details
- Primary fuel
- Solar
- Technology
- Solar Photovoltaic
- Operator
- Altus Power America Management, LLC
- County
- Lancaster County
- Generating units
- 1
- Share of state capacity
- 0.01%
- Rank among solar plants in Pennsylvania
- #34 of 75
- EIA plant code
- 58091
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| KSTN | Solar Photovoltaic | 5.0 MW | 5.0 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 Pennsylvania
| Weatherly(PA) RTO BTM | Other | 5.4 MW |
| Townsend Hydro | Hydro | 5.2 MW |
| Vitro Architectural Glass (PA) | Other | 5.0 MW |
| Towanda Facility | Natural gas | 4.8 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 Pennsylvania power plants · What Pennsylvania actually generates