Harquahala Sun Solar Project
Solar power plant · Maricopa County, Arizona
Nameplate capacity
150 MW
Rank in Arizona
#69
of 200 plants
In service since
2025
April 2025
Details
- Primary fuel
- Solar
- Technology
- Solar Photovoltaic
- Operator
- Copia Power
- County
- Maricopa County
- Generating units
- 1
- Share of state capacity
- 0.35%
- Rank among solar plants in Arizona
- #19 of 105
- EIA plant code
- 66670
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| HARQ1 | Solar Photovoltaic | 150 MW | 150 MW | 2025 | 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
| Agave | Solar | 150 MW |
| Atlas IX | Battery storage | 150 MW |
| Justice Energy Storage | Battery storage | 150 MW |
| Mesquite Solar 3, LLC | Solar | 150 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 150 MW solar plant and a 150 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