Storey Solar and Storage
Pinal County, Arizona · EIA plant ID 65956 · Operator: storey energy center, llc
Nameplate210MWSummer 176 MW
Generators2in service
Net generation298GWh12 mo to Aug 2026
Capacity factor41%solar units, summer MW
Heat rate—thermal plants only
First online2023
The 12-month figures include preliminary EIA-923 months, which EIA revises. Final data runs through Dec 2025.
Monthly net generation
EIA-923, all units at the plant. Net of station use; storage can go negative.
FinalPreliminary
Capacity factor by year
Net MWh ÷ (summer MW × hours), solar units. Each year uses that year's EIA-860 ratings; the hollow dot is the latest 12 months.
Heat rate by year
Electric fuel MMBtu × 1000 ÷ net MWh (Btu/kWh, HHV), fossil units only; CT + CA counted as one combined-cycle block.
Heat rate applies to fuel-burning (thermal) units only.
Annual data table
| Year | Net GWh | Capacity factor | Heat rate (Btu/kWh) |
|---|---|---|---|
| 2023 | 29.8 | 47.4% | — |
| 2024 | 293 | 39.5% | — |
| 2025 | 300.8 | 40.8% | — |
Generators
EIA-860 (annual) with EIA-860M updates through Sep 2026. EIA-923 reports generation by plant, prime mover and fuel, not by unit, so unit-level output isn't shown.
| Gen ID | Technology | Prime mover | Nameplate MW | Summer MW | Online | Status | Planned retirement | OEM / model |
|---|---|---|---|---|---|---|---|---|
| STOBA | Batteries | BA | 88 | 88 | Sep 2023 | Operating | — | coming soon |
| STORY | Solar Photovoltaic | PV | 122 | 88 | Dec 2023 | Operating | — | coming soon |
Owner / operator
Operator: storey energy center, llc. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| storey energy center, llc | 100.0% | 210 MW |
Nearby plants
Within 80 km.
| Saint Solar | 100 MW | 2.5 km |
| Saint Energy Storage II LLC | 100 MW | 2.6 km |
| Coolidge Generation Station | 1,023 MW | 3.3 km |
| Flatland Storage | 200 MW | 3.4 km |
| Brittlebush Solar | 200 MW | 4.2 km |
| Selma Energy Center | — | 5 km |