Wolfskill Energy Center
Solano County, California · EIA plant ID 55855 · Operator: Gilroy Energy Center LLC
Nameplate48MWSummer 47 MW
Generators1in service
Net generation4GWh12 mo to Dec 2025
Capacity factor1%gas/coal/oil units, summer MW
Heat rate10,006Btu/kWhfossil units, electric fuel, HHV
First online2003Runs as rarely runs
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), gas/coal/oil 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.
Annual data table
| Year | Net GWh | Capacity factor | Heat rate (Btu/kWh) |
|---|---|---|---|
| 2003 | 16.1 | 4.6% | 9,956 |
| 2004 | 21.1 | 5.3% | 10,151 |
| 2005 | 15.8 | 4.0% | 10,241 |
| 2006 | 16.8 | 4.3% | 10,318 |
| 2007 | 20.5 | 5.2% | 10,252 |
| 2008 | 25.9 | 6.5% | 10,296 |
| 2009 | 19.2 | 4.9% | 10,289 |
| 2010 | 7.6 | 1.9% | 10,384 |
| 2011 | 9.9 | 2.5% | 12,734 |
| 2012 | 16.5 | 4.2% | 11,838 |
| 2013 | 19 | 4.8% | 10,827 |
| 2014 | 18.1 | 4.6% | 10,982 |
| 2015 | 26.3 | 6.7% | 10,745 |
| 2016 | 16.5 | 4.2% | 11,058 |
| 2017 | 15.4 | 3.9% | 11,973 |
| 2018 | 9.4 | 2.4% | 11,839 |
| 2019 | 7 | 1.8% | 11,964 |
| 2020 | 8.9 | 2.2% | 11,872 |
| 2021 | 9.4 | 2.4% | 11,048 |
| 2022 | 9.2 | 2.4% | 10,426 |
| 2023 | 8 | 2.0% | 10,877 |
| 2024 | 7.4 | 1.8% | 10,856 |
| 2025 | 3.9 | 0.9% | 10,006 |
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 |
|---|---|---|---|---|---|---|---|---|
| CTG1 | Natural Gas Fired Combustion Turbine | GT | 48 | 47 | Jan 2003 | Operating | — | coming soon |
Owner / operator
Operator: Gilroy Energy Center LLC. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Gilroy Energy Center LLC | 100.0% | 48 MW |
Nearby plants
Within 80 km.
| ATT North Watney | 2 MW | 0.9 km |
| SunEdison Anheuser Busch Fairfield | 1 MW | 1.6 km |
| Foundation AB | 2 MW | 1.6 km |
| Anheuser-Busch #2 | 2 MW | 1.6 km |
| Anheuser Busch - Fairfield | 3 MW | 1.7 km |
| Solano County Cogen Plant | 3 MW | 3.9 km |