Saint Energy Storage II LLC
Battery storage power plant · Pinal County, Arizona
Nameplate capacity
100 MW
Rank in Arizona
#86
of 200 plants
In service since
2023
September 2023
Details
- Primary fuel
- Battery storage
- Technology
- Batteries
- Operator
- Saint Energy Storage II LLC
- County
- Pinal County
- Generating units
- 1
- Share of state capacity
- 0.23%
- Rank among battery storage plants in Arizona
- #19 of 35
- EIA plant code
- 66716
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| SB123 | Batteries | 100 MW | 100 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
| East Line Solar | Solar | 100 MW |
| Mesquite Solar 2, LLC | Solar | 100 MW |
| Saint Solar | Solar | 100 MW |
| West Line Solar, LLC | Solar | 100 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 100 MW solar plant and a 100 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