Iron Horse Battery Storage Hybrid
Battery storage power plant · Pima County, Arizona
Nameplate capacity
12 MW
Rank in Arizona
#143
of 200 plants
In service since
2017
April 2017
Details
- Primary fuel
- Battery storage
- Technology
- Batteries
- Operator
- RWE Clean Energy
- County
- Pima County
- Generating units
- 2
- Share of state capacity
- 0.03%
- Rank among battery storage plants in Arizona
- #33 of 35
- EIA plant code
- 60996
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| BA1 | Batteries | 10 MW | 10 MW | 2017 | Operating |
| PV1 | Solar Photovoltaic | 2.0 MW | 2.0 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 Arizona
| Davis Monthan AFB (AZ) West Airfield | Solar | 13 MW |
| Raptor Ridge | Solar | 13 MW |
| Luke Solar | Solar | 11 MW |
| Prescott Solar Plant | Solar | 11 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 12 MW solar plant and a 12 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 Arizona power plants · What Arizona actually generates