Gilroy Power Plant
Santa Clara County, California · EIA plant ID 10034 · Operator: Calpine Gilroy Cogen LP
Nameplate130MWSummer 101 MW
Generators2in service
Net generation21GWh12 mo to Dec 2025
Capacity factor2%gas/coal/oil units, summer MW
Heat rate7,589Btu/kWhfossil units, electric fuel, HHV
First online1987Runs as peaking
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) |
|---|---|---|---|
| 2001 | 959.1 | — | — |
| 2002 | 842.9 | — | — |
| 2003 | 179.3 | 15.8% | 8,723 |
| 2004 | 329.7 | 28.9% | 8,448 |
| 2005 | 108.5 | 9.5% | 8,448 |
| 2006 | 109.7 | 9.6% | 8,448 |
| 2007 | 281.3 | 24.7% | 8,413 |
| 2008 | 124.1 | 13.5% | 8,409 |
| 2009 | 261.6 | 28.4% | 8,425 |
| 2010 | 160.7 | 17.5% | 8,414 |
| 2011 | 43 | 4.7% | 8,403 |
| 2012 | 241.3 | 26.2% | 8,439 |
| 2013 | 125.1 | 12.4% | 8,629 |
| 2014 | 61.4 | 6.1% | 8,371 |
| 2015 | 138.2 | 13.7% | 8,375 |
| 2016 | 141.4 | 14.0% | 7,577 |
| 2017 | 115.5 | 11.5% | 7,782 |
| 2018 | 102.7 | 10.2% | 7,705 |
| 2019 | 89.5 | 8.9% | 7,788 |
| 2020 | 107.5 | 10.6% | 7,721 |
| 2021 | 100.7 | 10.0% | 7,824 |
| 2022 | 79.1 | 7.8% | 7,737 |
| 2023 | 59.5 | 6.7% | 7,579 |
| 2024 | 44.2 | 5.0% | 7,585 |
| 2025 | 21.1 | 2.4% | 7,589 |
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 |
|---|---|---|---|---|---|---|---|---|
| GEN1 | Natural Gas Fired Combined Cycle | CT | 90 | 72 | Oct 1987 | Operating | — | coming soon |
| GEN2 | Natural Gas Fired Combined Cycle | CA | 40 | 29 | Oct 1987 | Operating | — | coming soon |
Owner / operator
Operator: Calpine Gilroy Cogen LP. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Calpine Gilroy Cogen LP | 100.0% | 130 MW |
Nearby plants
Within 80 km.
| Gilroy Peaking Energy Center | 144 MW | 0.1 km |
| Gavilan Community College Solar Project | 2 MW | 5.1 km |
| Graniterock Quarry | 4 MW | 14.8 km |
| Hollister Wastewater Facility | 1 MW | 17.8 km |
| Hollister Solar LLC | 2 MW | 18.1 km |
| Enerparc CA1 LLC | 2 MW | 22.1 km |