Gilroy Peaking Energy Center
Natural gas power plant in Santa Clara County, California. 144 MW of nameplate capacity across 3 generators, operated by Calpine Gilroy Cogen LP.
Also known as EIA plant 55810
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Key facts
- Capacity
- 144 MWNameplate
- Generators
- 3 operatingEIA-860M, August 2026
- Operating since
- November 2001First generator online
- Operator
- Calpine Gilroy Cogen LPEIA operator ID 3028
- Grid
- CAISOBalancing authority CISO
- Price nodes
- 2 CAISO nodesResource nodes with prices
- Location
- Santa Clara County, CA36.9990, −121.5363
- EIA plant ID
- 55810EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Gilroy Peaking produces
Free · EIA-923Net generation, 2025
30.9 GWh
30,910 MWh, final
Capacity factor, 2025
2.5%
2024: Not reported
January to July 2026
Not reported
Provisional. 0 of 7 months reported
Range, 2015 to 2025
18.2–39.1
GWh a year. Low 2016, high 2015
| Year | Net generation, MWh | Capacity factor | Months reported |
|---|---|---|---|
| 2000 | Not reported | Not reported | 0 of 12 |
| 2001 | Not reported | Not reported | 0 of 12 |
| 2002 | 50,326 | Not reported | 7 of 12 |
| 2003 | 60,196 | Not reported | 12 of 12 |
| 2004 | 70,274 | Not reported | 12 of 12 |
| 2005 | 51,264 | Not reported | 12 of 12 |
| 2006 | 52,306 | Not reported | 12 of 12 |
| 2007 | 86,459 | Not reported | 12 of 12 |
| 2008 | 93,115 | Not reported | 12 of 12 |
| 2009 | 57,519 | Not reported | 12 of 12 |
| 2010 | 30,795 | 2.6% | 12 of 12 |
| 2011 | 31,044 | 2.6% | 12 of 12 |
| 2012 | 64,383 | 5.4% | 12 of 12 |
| 2013 | 63,073 | 5.3% | 12 of 12 |
| 2014 | 29,496 | 2.5% | 12 of 12 |
| 2015 | 39,144 | 3.3% | 12 of 12 |
| 2016 | 18,168 | 1.5% | 12 of 12 |
| 2017 | 29,699 | 2.5% | 12 of 12 |
| 2018 | 25,659 | 2.2% | 12 of 12 |
| 2019 | 26,677 | 2.3% | 12 of 12 |
| 2020 | 29,130 | 2.5% | 12 of 12 |
| 2021 | 23,082 | 2.0% | 12 of 12 |
| 2022 | 28,539 | 2.4% | 12 of 12 |
| 2023 | 24,175 | 2.0% | 12 of 12 |
| 2024 | 23,334 | Not reported | 12 of 12 |
| 2025 | 30,910 | 2.5% | 12 of 12 |
| 2026 (provisional, partial year) | Not reported | Not reported | 0 of 7 |
* 2026 covers January to July and is provisional. Capacity factor is net generation divided by nameplate capacity times the hours of each reported month.
Power prices and basis
Free account · CAISOEmissions
Free · EPA CAMPDCO₂, 2025
19,623
US short tons. 2024: 15,747
SO₂, 2025
0
US short tons
NOx, 2025
5
US short tons
CO₂ per MWh, calculated
0.63 t
About 1,270 lb per MWh
3 of 3 EPA units reported CO₂ in 2025 (S-3, S-4, S-5), matched to EIA plant 55810 through the EPA–EIA crosswalk. The per-MWh rate is EPA CO₂ divided by EIA-923 net generation. The two reporting boundaries can differ.
Water use
Free · EIA-923 cooling, USGSNo EIA cooling-water record for this plant in 2024.
Generators
Free · EIA-860M| Generator | Technology | Nameplate MW | Online since |
|---|---|---|---|
| S3 | Natural Gas Fired Combustion Turbine | 48.0 | November 2001 |
| S4 | Natural Gas Fired Combustion Turbine | 48.0 | November 2001 |
| S5 | Natural Gas Fired Combustion Turbine | 48.0 | February 2002 |
Ownership and offtake
ProOwnership and offtake are part of Pro
Owners and their shares, parent companies, and power purchase agreements with their buyers. EIA-860M lists Calpine Gilroy Cogen LP as the operator, which is not always the owner.
Modeled data
ProPro adds modeled values for this plant. Everything above stays free.
Generation potential vs reported
Monthly potential at seasonal net capability, next to EIA-923 output. Shows how much of the plant's capability was used.
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Questions about Gilroy Peaking
How much power does Gilroy Peaking Energy Center produce?
Gilroy Peaking Energy Center reported 30,910 MWh (30.9 GWh) of net generation in 2025, a 2.5% capacity factor on 144 MW of nameplate capacity.
Where is Gilroy Peaking Energy Center?
Gilroy Peaking Energy Center is in Santa Clara County, California, at 36.9990, −121.5363. It is in the California Independent System Operator balancing area (CISO).
Who operates Gilroy Peaking Energy Center?
EIA-860M for August 2026 lists Calpine Gilroy Cogen LP as the operator (EIA operator ID 3028). The operator is not always the owner.
When did Gilroy Peaking Energy Center start operating?
Its first generator began operating in November 2001, according to EIA-860M.
Does InfraMap have power prices for Gilroy Peaking Energy Center?
Yes. InfraMap has CAISO day-ahead and real-time prices at 2 price nodes linked to Gilroy Peaking Energy Center, with the hub price and node-to-hub basis. Prices are free with an InfraMap account; pricing node names are part of InfraMap Pro.
Sources
- EIA-860 2025 (final) and EIA-860M August 2026: plant, generators, capacity, operator and location
- EIA-923 monthly net generation, 2000 to July 2026 (2026 provisional)
- EPA CAMPD annual emissions through the EPA–EIA crosswalk, 1995 to 2025
- CAISO day-ahead and real-time prices; node and hub assignments as of 2026-10-05
Page updated 2026-10-04 from the InfraMap data build. Methodology · Data sources · EIA plant page