Saddle Mountain Solar I
Maricopa County, Arizona · EIA plant ID 58213 · Operator: SunE AZ2 LLC
Nameplate15MWSummer 15 MW
Generators1in service
Net generation33GWh12 mo to Dec 2025
Capacity factor25%solar units, summer MW
Heat rate—thermal plants only
First online2012
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) |
|---|---|---|---|
| 2012 | 1.5 | 13.5% | — |
| 2013 | 39.2 | 29.8% | — |
| 2014 | 37.6 | 28.6% | — |
| 2015 | 35.8 | 27.2% | — |
| 2016 | 47.8 | 36.3% | — |
| 2018 | 34.5 | 26.3% | — |
| 2019 | 35.2 | 26.8% | — |
| 2020 | 35 | 26.6% | — |
| 2021 | 34.3 | 26.1% | — |
| 2022 | 33.7 | 25.7% | — |
| 2023 | 30.9 | 23.5% | — |
| 2024 | 34.5 | 26.2% | — |
| 2025 | 33.3 | 25.4% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| AZ2 | Solar Photovoltaic | PV | 15 | 15 | Dec 2012 | Operating | — | coming soon |
Owner / operator
Operator: SunE AZ2 LLC. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| SunE AZ2 LLC | 100.0% | 15 MW |
Nearby plants
Within 80 km.
| Saddleback Generation Station | — | 3.7 km |
| Harquahala Sun Solar Project | 150 MW | 8.1 km |
| Harquahala 2 | 600 MW | 11.2 km |
| Maricopa Solar | 550 MW | 11.5 km |
| Harquahala Generating Project | 1,277 MW | 12.5 km |
| Papago PV | 150 MW | 17.5 km |