Rocky Mountain Solar
Solar power plant · Pueblo County, Colorado
Nameplate capacity
525 MW
Rank in Colorado
#10
of 326 plants
In service since
2025
December 2025
Details
- Primary fuel
- Solar
- Technology
- Solar Photovoltaic
- Operator
- Public Service Co of Colorado
- County
- Pueblo County
- Generating units
- 2
- Share of state capacity
- 2.29%
- Rank among solar plants in Colorado
- #1 of 184
- EIA plant code
- 69100
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| RKMS | Solar Photovoltaic | 325 MW | 325 MW | 2025 | Operating |
| RKMB | Batteries | 200 MW | 200 MW | 2026 | 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 Colorado
| Front Range Power Plant | Natural gas | 554 MW |
| Pawnee | Natural gas | 552 MW |
| Cheyenne Ridge Wind Farm | Wind | 498 MW |
| Hayden | Coal | 465 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 525 MW solar plant and a 525 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 Colorado power plants · What Colorado actually generates