Arlington Valley Solar Energy II
Maricopa County, Arizona · EIA plant ID 57680 · Operator: Arlington Valley Solar Energy II LLC
Nameplate129MWSummer 125 MW
Generators5in service
Net generation336GWh12 mo to Dec 2025
Capacity factor31%solar units, summer MW
Heat rate—thermal plants only
First online2013
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) |
|---|---|---|---|
| 2013 | 194.7 | 29.7% | — |
| 2014 | 365.1 | 33.2% | — |
| 2015 | 357 | 32.5% | — |
| 2016 | 364.4 | 33.1% | — |
| 2017 | 358 | 32.6% | — |
| 2018 | 335.1 | 30.5% | — |
| 2019 | 348.4 | 31.7% | — |
| 2020 | 361.7 | 32.8% | — |
| 2021 | 353.3 | 32.2% | — |
| 2022 | 354.4 | 32.3% | — |
| 2023 | 348.5 | 31.7% | — |
| 2024 | 341.2 | 31.0% | — |
| 2025 | 336 | 30.6% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| AVSE1 | Solar Photovoltaic | PV | 19 | 18.5 | Apr 2013 | Operating | — | coming soon |
| AVSE2 | Solar Photovoltaic | PV | 28 | 27.3 | Apr 2013 | Operating | — | coming soon |
| AVSE3 | Solar Photovoltaic | PV | 28 | 27.3 | May 2013 | Operating | — | coming soon |
| AVSE4 | Solar Photovoltaic | PV | 26 | 25 | Aug 2013 | Operating | — | coming soon |
| AVSE5 | Solar Photovoltaic | PV | 28 | 27.3 | Aug 2013 | Operating | — | coming soon |
Owner / operator
Operator: Arlington Valley Solar Energy II LLC. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Arlington Valley Solar Energy II LLC | 100.0% | 129 MW |
Nearby plants
Within 80 km.
| Agave | 150 MW | 2.2 km |
| Sun Streams 2 | 150 MW | 2.3 km |
| Red Hawk | 1,127 MW | 3.3 km |
| Sun Streams 3 | 430 MW | 3.6 km |
| Arlington Valley Solar Energy I | 127 MW | 4.7 km |
| Sun Streams, LLC | 160 MW | 4.9 km |