Gilroy Peaking Energy Center
Santa Clara County, California · EIA plant ID 55810 · Operator: Calpine Gilroy Cogen LP
Nameplate144MWSummer 144 MW
Generators3in service
Net generation31GWh12 mo to Dec 2025
Capacity factor2%gas/coal/oil units, summer MW
Heat rate10,688Btu/kWhfossil units, electric fuel, HHV
First online2001Runs 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) |
|---|---|---|---|
| 2002 | 50.3 | 4.6% | 10,831 |
| 2003 | 60.2 | 5.4% | 11,528 |
| 2004 | 70.3 | 6.2% | 9,616 |
| 2005 | 51.3 | 4.6% | 9,944 |
| 2006 | 52.3 | 4.7% | 10,085 |
| 2007 | 86.5 | 7.7% | 10,431 |
| 2008 | 93.1 | 7.8% | 10,393 |
| 2009 | 57.5 | 4.9% | 10,595 |
| 2010 | 30.8 | 2.6% | 10,949 |
| 2011 | 31 | 2.6% | 11,928 |
| 2012 | 64.4 | 5.4% | 12,377 |
| 2013 | 63.1 | 5.3% | 11,183 |
| 2014 | 29.5 | 2.5% | 11,676 |
| 2015 | 39.1 | 3.3% | 11,197 |
| 2016 | 18.2 | 1.5% | 11,226 |
| 2017 | 29.7 | 2.5% | 12,166 |
| 2018 | 25.7 | 2.2% | 11,865 |
| 2019 | 26.7 | 2.3% | 11,844 |
| 2020 | 29.1 | 2.5% | 12,348 |
| 2021 | 23.1 | 1.9% | 11,414 |
| 2022 | 28.5 | 2.4% | 11,131 |
| 2023 | 24.2 | 2.4% | 11,400 |
| 2024 | 23.3 | 1.8% | 10,874 |
| 2025 | 30.9 | 2.5% | 10,688 |
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 |
|---|---|---|---|---|---|---|---|---|
| S3 | Natural Gas Fired Combustion Turbine | GT | 48 | 48 | Nov 2001 | Operating | — | coming soon |
| S4 | Natural Gas Fired Combustion Turbine | GT | 48 | 48 | Nov 2001 | Operating | — | coming soon |
| S5 | Natural Gas Fired Combustion Turbine | GT | 48 | 48 | Feb 2002 | 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).
| Gilroy Energy Center LLC | 100.0% | 144 MW |
Nearby plants
Within 80 km.
| Gilroy Power Plant | 130 MW | 0.1 km |
| Gavilan Community College Solar Project | 2 MW | 5.1 km |
| Graniterock Quarry | 4 MW | 14.7 km |
| Hollister Wastewater Facility | 1 MW | 17.7 km |
| Hollister Solar LLC | 2 MW | 17.9 km |
| Enerparc CA1 LLC | 2 MW | 22 km |