Harquahala Sun Solar Project
Maricopa County, Arizona · EIA plant ID 66670 · Operator: Copia Power
Nameplate150MWSummer 150 MW
Generators1in service
Net generation455GWh12 mo to Aug 2026
Capacity factor35%solar units, summer MW
Heat rate—thermal plants only
First online2025
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) |
|---|---|---|---|
| 2025 | 316.8 | 32.0% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| HARQ1 | Solar Photovoltaic | PV | 150 | 150 | Apr 2025 | Operating | — | coming soon |
Owner / operator
Operator: Copia Power. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Copia Power | 100.0% | 150 MW |
Nearby plants
Within 80 km.
| Harquahala 2 | 600 MW | 3.2 km |
| Maricopa Solar | 550 MW | 3.4 km |
| Harquahala Generating Project | 1,277 MW | 4.4 km |
| Saddleback Generation Station | — | 4.7 km |
| Saddle Mountain Solar I | 15 MW | 8.1 km |
| Papago PV | 150 MW | 10 km |