Sandstone Solar
Pinal County, Arizona · EIA plant ID 59634 · Operator: AES Distributed Energy
Nameplate45MWSummer 43 MW
Generators1in service
Net generation117GWh12 mo to Dec 2025
Capacity factor31%solar units, summer MW
Heat rate—thermal plants only
First online2015
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) |
|---|---|---|---|
| 2015 | 2.5 | 7.6% | — |
| 2016 | 121.5 | 30.7% | — |
| 2017 | 124.2 | 31.5% | — |
| 2018 | 123.2 | 32.7% | — |
| 2019 | 120.8 | 32.1% | — |
| 2020 | 125.3 | 33.2% | — |
| 2021 | 119.3 | 31.7% | — |
| 2022 | 116.5 | 30.9% | — |
| 2023 | 111.1 | 29.5% | — |
| 2024 | 117.2 | 31.0% | — |
| 2025 | 116.9 | 31.0% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| SNDST | Solar Photovoltaic | PV | 45 | 43 | Dec 2015 | Operating | — | coming soon |
Owner / operator
Operator: AES Distributed Energy. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| AES Distributed Energy | 100.0% | 45 MW |
Nearby plants
Within 80 km.
| Bonnybrooke PV | 50 MW | 8.6 km |
| Valley Farms Energy Center | — | 10.1 km |
| Brittlebush Solar | 200 MW | 13.4 km |
| Copper Crossing Energy Center | 153 MW | 14.2 km |
| Flatland Storage | 200 MW | 14.4 km |
| Poseidon Solar, LLC | 20 MW | 14.8 km |