Neptune Energy Center Hybrid
Solar power plant · Pueblo County, Colorado
Nameplate capacity
450 MW
Rank in Colorado
#13
of 326 plants
In service since
2023
June 2023
Details
- Primary fuel
- Solar
- Technology
- Solar Photovoltaic
- Operator
- Neptune Energy Center, LLC
- County
- Pueblo County
- Generating units
- 2
- Share of state capacity
- 1.96%
- Rank among solar plants in Colorado
- #2 of 184
- EIA plant code
- 63731
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| NT325 | Solar Photovoltaic | 325 MW | 325 MW | 2023 | Operating |
| NT125 | Batteries | 125 MW | 125 MW | 2023 | 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
| Cheyenne Ridge Wind Farm | Wind | 498 MW |
| Hayden | Coal | 465 MW |
| Pueblo Airport Generating Station | Natural gas | 440 MW |
| Spindle Hill Energy Center | Natural gas | 420 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 450 MW solar plant and a 450 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