Power plants operated by Arizona Public Service Co
Arizona Public Service Co operates 21 power plants in the 2025 EIA-860 data, with 10.9 GW of nameplate capacity, the 20th-largest fleet among the 5,826 operators on file. They are spread over two states: Arizona and New Mexico. Natural gas is 40% of the capacity; the largest site is Palo Verde. Its oldest working unit dates from 1959, at Yucca. Units added from 2020 to 2025 total 441 MW.
- Natural gas4,345 MW40%
- Nuclear4,210 MW39%
- Coal1,636 MW15%
- Solar391 MW3.6%
- Battery storage201 MW1.8%
- Oil and petroleum124 MW1.1%
Capacity by decade it came online
NuclearCoalNatural gasOil and petroleumSolarBattery storage
Above the line: capacity operating in 2025. Below: capacity retired at these plants.
Plants
| Plant | State | Runs on | Capacity | First unit |
|---|---|---|---|---|
| Palo Verde | Arizona | Nuclear | 4,210 MW | 1986 |
| Four Corners | New Mexico | Coal | 1,636 MW | 1969 |
| West Phoenix | Arizona | Natural gas | 1,207 MW | 1972 |
| Red Hawk | Arizona | Natural gas | 1,127 MW | 2002 |
| Ocotillo | Arizona | Natural gas | 806 MW | 1972 |
| Sundance | Arizona | Natural gas | 695 MW | 2002 |
| Yucca | Arizona | Natural gas | 422 MW | 1959 |
| Saguaro | Arizona | Natural gas | 184 MW | 1972 |
| Agave | Arizona | Solar | 150 MW | 2023 |
| Red Rock | Arizona | Solar | 84.9 MW | 2017 |
| Foothills Solar Plant Hybrid | Arizona | Solar | 73 MW | 2013 |
| Gila Bend Hybrid | Arizona | Solar | 68 MW | 2014 |
| Hyder Solar Hybrid | Arizona | Solar | 48 MW | 2011 |
| Chino Valley Solar | Arizona | Battery storage | 38 MW | 2012 |
| Cotton Center Solar Hybrid | Arizona | Battery storage | 34 MW | 2011 |
| Paloma Solar Hybrid | Arizona | Battery storage | 34 MW | 2011 |
| Hyder II Hybrid | Arizona | Battery storage | 28 MW | 2013 |
| Douglas | Arizona | Oil and petroleum | 26.1 MW | 1972 |
| Desert Star Hybrid | Arizona | Battery storage | 20 MW | 2015 |
| Luke Solar | Arizona | Solar | 11.2 MW | 2015 |
| Prescott Airport | Arizona | Solar | 3 MW | 2002 |