Henrietta Peaker
Natural gas power plant in Kings County, California. 98 MW of nameplate capacity across 2 generators, operated by MRP San Joaquin Energy LLC..
Also known as Henrietta Peaker power plant · EIA plant 55807
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 98 MWNameplate
- Generators
- 2 operatingEIA-860M, August 2026
- Operating since
- June 2002First generator online
- Operator
- MRP San Joaquin Energy LLC.EIA operator ID 7724
- Grid
- CAISOBalancing authority CISO
- Price nodes
- 2 CAISO nodesResource nodes with prices
- Location
- Kings County, CA36.2397, −119.9044
- EIA plant ID
- 55807EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Henrietta Peaker produces
Free · EIA-923Net generation, 2025
3.77 GWh
3,772 MWh, final
Capacity factor, 2025
0.4%
2024: 1.1%
January to July 2026
1.99 GWh
Provisional
Range, 2015 to 2025
3.5–98.8
GWh a year. Low 2023, 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 | 32,808 | Not reported | 7 of 12 |
| 2003 | 19,698 | Not reported | 12 of 12 |
| 2004 | 10,984 | Not reported | 12 of 12 |
| 2005 | 13,038 | Not reported | 12 of 12 |
| 2006 | 19,223 | Not reported | 12 of 12 |
| 2007 | 21,012 | Not reported | 12 of 12 |
| 2008 | 48,062 | Not reported | 12 of 12 |
| 2009 | 55,230 | Not reported | 12 of 12 |
| 2010 | 15,827 | 1.8% | 12 of 12 |
| 2011 | 15,943 | 1.9% | 12 of 12 |
| 2012 | 38,737 | 4.5% | 12 of 12 |
| 2013 | 54,088 | 6.3% | 12 of 12 |
| 2014 | 98,228 | 11.4% | 12 of 12 |
| 2015 | 98,827 | 11.5% | 12 of 12 |
| 2016 | 32,522 | 3.8% | 12 of 12 |
| 2017 | 38,508 | 4.5% | 12 of 12 |
| 2018 | 32,903 | 3.8% | 12 of 12 |
| 2019 | 30,535 | 3.6% | 12 of 12 |
| 2020 | 30,308 | 3.5% | 12 of 12 |
| 2021 | 24,959 | 2.9% | 12 of 12 |
| 2022 | 48,676 | 5.7% | 12 of 12 |
| 2023 | 3,536 | 0.4% | 12 of 12 |
| 2024 | 9,805 | 1.1% | 12 of 12 |
| 2025 | 3,772 | 0.4% | 12 of 12 |
| 2026 (provisional, partial year) | 1,986 | 0.4% | 7 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
2,216
US short tons. 2024: 5,887
SO₂, 2025
0
US short tons
NOx, 2025
0
US short tons
CO₂ per MWh, calculated
0.59 t
About 1,175 lb per MWh
2 of 2 EPA units reported CO₂ in 2025 (HPP1, HPP2), matched to EIA plant 55807 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 |
|---|---|---|---|
| HPP1 | Natural Gas Fired Combustion Turbine | 49.0 | June 2002 |
| HPP2 | Natural Gas Fired Combustion Turbine | 49.0 | June 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 MRP San Joaquin Energy LLC. 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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Power plants near Henrietta Peaker
More plants operated by MRP San Joaquin Energy LLC.
Questions about Henrietta Peaker
How much power does Henrietta Peaker produce?
Henrietta Peaker reported 3,772 MWh (3.77 GWh) of net generation in 2025, a 0.4% capacity factor on 98 MW of nameplate capacity. From January to July 2026 it reported 1.99 GWh, which is provisional.
Where is Henrietta Peaker?
Henrietta Peaker is in Kings County, California, at 36.2397, −119.9044. It is in the California Independent System Operator balancing area (CISO).
Who operates Henrietta Peaker?
EIA-860M for August 2026 lists MRP San Joaquin Energy LLC. as the operator (EIA operator ID 7724). The operator is not always the owner.
When did Henrietta Peaker start operating?
Its first generator began operating in June 2002, according to EIA-860M.
Does InfraMap have power prices for Henrietta Peaker?
Yes. InfraMap has CAISO day-ahead and real-time prices at 2 price nodes linked to Henrietta Peaker, 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
- Plant names from OpenStreetMap, © OpenStreetMap contributors (ODbL)
Page updated 2026-10-04 from the InfraMap data build. Methodology · Data sources · EIA plant page