Nameplate capacity
384 MW
Rank in Arizona
#36
of 200 plants
In service since
2025
April 2025
Details
- Primary fuel
- Battery storage
- Technology
- Batteries
- Operator
- Serrano Solar, LLC
- County
- Pima County
- Generating units
- 2
- Share of state capacity
- 0.90%
- Rank among battery storage plants in Arizona
- #3 of 35
- EIA plant code
- 67503
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| GEN02 | Batteries | 214 MW | 214 MW | 2025 | Operating |
| GEN01 | Solar Photovoltaic | 170 MW | 170 MW | 2025 | 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
| Sun Streams 3 | Solar | 430 MW |
| Yucca | Natural gas | 422 MW |
| Mohave County Wind Farm | Wind | 350 MW |
| Agua Caliente Solar Project | Solar | 348 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 384 MW solar plant and a 384 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