El Sol BESS
Battery storage power plant · Maricopa County, Arizona
Nameplate capacity
50 MW
Rank in Arizona
#106
of 200 plants
In service since
2023
February 2023
Details
- Primary fuel
- Battery storage
- Technology
- Batteries
- Operator
- Invenergy Services LLC
- County
- Maricopa County
- Generating units
- 1
- Share of state capacity
- 0.12%
- Rank among battery storage plants in Arizona
- #24 of 35
- EIA plant code
- 62964
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| EL50M | Batteries | 50 MW | 50 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 Arizona
| Gray Hawk Solar | Solar | 55 MW |
| Bonnybrooke PV | Solar | 50 MW |
| Kingman Energy Storage | Battery storage | 50 MW |
| Hyder Solar Hybrid | Solar | 48 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 50 MW solar plant and a 50 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