Sonora 1
Tuolumne County, California · EIA plant ID 58578 · Operator: CleanCapital Holdings
Nameplate2MWSummer 2 MW
Generators1in service
Net generation1GWh12 mo to Dec 2025
Capacity factor7%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 | 0.1 | 7.3% | — |
| 2014 | 3.8 | 28.5% | — |
| 2015 | 3.8 | 28.8% | — |
| 2016 | 3.8 | 28.8% | — |
| 2017 | 2.9 | 22.4% | — |
| 2018 | 3.7 | 27.8% | — |
| 2019 | 3.6 | 27.4% | — |
| 2020 | 3.6 | 27.2% | — |
| 2021 | 3.7 | 27.9% | — |
| 2022 | 4 | 30.1% | — |
| 2023 | 2.7 | 20.8% | — |
| 2024 | 0.6 | 4.7% | — |
| 2025 | 0.9 | 6.5% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| SON1 | Solar Photovoltaic | PV | 1.5 | 1.5 | Dec 2013 | Operating | — | coming soon |
Owner / operator
Operator: CleanCapital Holdings. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| CleanCapital Holdings | 100.0% | 2 MW |
Nearby plants
Within 80 km.
| Pacific-Ultrapower Chinese Station | 25 MW | 4.8 km |
| Sierra Energy Storage, LLC | 10 MW | 4.8 km |
| New Melones | 300 MW | 6.4 km |
| Sierra Pacific Chinese Camp | 4 MW | 6.6 km |
| Tulloch | 30 MW | 6.9 km |
| Angels | 1 MW | 20.3 km |