38th largest plant in Arizona · 1221st nationally
Sierra Estrella Energy Storage is a battery storage power plant in Arizona with a nameplate capacity of 250 MW.
| Plant Name | Sierra Estrella Energy Storage |
|---|---|
| Operator | Sierra Estrella Energy Storage, Llc |
| City | Tolleson |
| County | Maricopa County |
| State | Arizona |
| ZIP | 85353 |
| Coordinates | 33.41080, -112.31380 |
This plant highlighted in navy-ringed pin; other generators within 25 miles shown as fuel-colored dots.
| ID | Technology | Fuel | Capacity | Status | Online |
|---|---|---|---|---|---|
| BESS3 | Batteries | Battery | 250 MW | Operating | 2024 |
| NERC Region | WECC |
|---|---|
| Balancing Authority | Salt River Project |
Battery storage facilities don't generate electricity — they store it. They charge from the grid (often from solar during the day) and discharge during peak demand or to firm up renewables. EIA classifies them as power plants because they connect to the grid like one.