Cotton Center Solar Hybrid
Maricopa County, Arizona · EIA plant ID 57561 · Operator: Arizona Public Service Co
Nameplate34MWSummer 34 MW
Generators2in service
Net generation29GWh12 mo to Dec 2025
Capacity factor—not meaningful for storage
Heat rate—thermal plants only
First online2011
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), primary-fuel units. Each year uses that year's EIA-860 ratings; the hollow dot is the latest 12 months.
No capacity factor available.
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) |
|---|---|---|---|
| 2011 | 11.6 | — | — |
| 2012 | 46.2 | — | — |
| 2013 | 43.7 | — | — |
| 2014 | 43.6 | — | — |
| 2015 | 42.8 | — | — |
| 2016 | 39 | — | — |
| 2017 | 32.6 | — | — |
| 2018 | 36.8 | — | — |
| 2019 | 39.1 | — | — |
| 2020 | 39.1 | — | — |
| 2021 | 40.9 | — | — |
| 2022 | 34.8 | — | — |
| 2023 | 41.2 | — | — |
| 2024 | 36.5 | — | — |
| 2025 | 29.4 | — | — |
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 |
|---|---|---|---|---|---|---|---|---|
| CC17M | Batteries | BA | 17 | 17 | Apr 2023 | Operating | — | coming soon |
| PV1 | Solar Photovoltaic | PV | 17 | 17 | Nov 2011 | Operating | — | coming soon |
Owner / operator
Operator: Arizona Public Service Co. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Arizona Public Service Co | 100.0% | 34 MW |
Nearby plants
Within 80 km.
| RE Gillespie 1 LLC | 15 MW | 1 km |
| Paloma Solar Hybrid | 34 MW | 1.5 km |
| Gila River Power Station | 619 MW | 7.3 km |
| Gila River Power Block 3 | 619 MW | 7.3 km |
| Gila River Power Block 2 | 619 MW | 7.3 km |
| Gila River Power Block 1 | 619 MW | 7.3 km |