Chestnut
Solar and battery storage project in Kings County, California. 285.6 MW of nameplate capacity across 2 generators, operated by Chestnut Westside LLC.
Also known as EIA plant 63849
This project groups Chestnut (EIA 63849). EIA reports them as separate plants.
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 285.6 MWSolar 150.6 · Battery storage 135.0
- Generators
- 2 operatingEIA-860M, August 2026
- Operating since
- December 2023First generator online
- Operator
- Chestnut Westside LLCEIA operator ID 67267
- Grid
- CAISOBalancing authority CISO
- Price nodes
- 1 CAISO nodeResource nodes with prices
- Location
- Kings County, CA36.1602, −119.9049
- EIA plant ID
- 63849EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Chestnut produces
Free · EIA-923Net generation, 2025
378 GWh
377,844 MWh, final
Capacity factor, 2025
30.5%
2024: 29.2%
January to July 2026
228 GWh
Provisional
Range, 2024 to 2025
363.8–377.8
GWh a year. Low 2024, high 2025
| 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 | Not reported | Not reported | 0 of 12 |
| 2003 | Not reported | Not reported | 0 of 12 |
| 2004 | Not reported | Not reported | 0 of 12 |
| 2005 | Not reported | Not reported | 0 of 12 |
| 2006 | Not reported | Not reported | 0 of 12 |
| 2007 | Not reported | Not reported | 0 of 12 |
| 2008 | Not reported | Not reported | 0 of 12 |
| 2009 | Not reported | Not reported | 0 of 12 |
| 2010 | Not reported | Not reported | 0 of 12 |
| 2011 | Not reported | Not reported | 0 of 12 |
| 2012 | Not reported | Not reported | 0 of 12 |
| 2013 | Not reported | Not reported | 0 of 12 |
| 2014 | Not reported | Not reported | 0 of 12 |
| 2015 | Not reported | Not reported | 0 of 12 |
| 2016 | Not reported | Not reported | 0 of 12 |
| 2017 | Not reported | Not reported | 0 of 12 |
| 2018 | Not reported | Not reported | 0 of 12 |
| 2019 | Not reported | Not reported | 0 of 12 |
| 2020 | Not reported | Not reported | 0 of 12 |
| 2021 | Not reported | Not reported | 0 of 12 |
| 2022 | Not reported | Not reported | 0 of 12 |
| 2023 | Not reported | Not reported | 0 of 12 |
| 2024 | 363,836 | 29.2% | 12 of 12 |
| 2025 | 377,844 | 30.5% | 12 of 12 |
| 2026 (provisional, partial year) | 228,348 | 31.6% | 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 CAMPDNo EPA emissions units are linked to this plant.
Water use
Free · EIA-923 cooling, USGSNo EIA cooling-water record for this plant in 2024. Plants without steam cooling, such as wind, solar and batteries, do not report cooling water.
Generators
Free · EIA-860M| Generator | Technology | Nameplate MW | Online since |
|---|---|---|---|
| BESS1 | Batteries | 135.0 | December 2023 |
| CHNUT | Solar Photovoltaic | 150.6 | December 2023 |
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 Chestnut Westside LLC as the operator, which is not always the owner.
Modeled data
ProPro adds modeled values for this plant. Everything above stays free.
Modeled curtailment
A range, not one number. The lower bound counts hours inside the production tax credit window; the upper bound is the no-credit case.
Expected vs reported generation
Monthly modeled expected output and physical potential next to EIA-923 reported output.
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Power plants near Chestnut
Questions about Chestnut
How much power does Chestnut produce?
Chestnut reported 377,844 MWh (378 GWh) of net generation in 2025, a 30.5% capacity factor on 285.6 MW of nameplate capacity. From January to July 2026 it reported 228 GWh, which is provisional.
Where is Chestnut?
Chestnut is in Kings County, California, at 36.1602, −119.9049. It is in the California Independent System Operator balancing area (CISO).
Who operates Chestnut?
EIA-860M for August 2026 lists Chestnut Westside LLC as the operator (EIA operator ID 67267). The operator is not always the owner.
Is Chestnut a solar or a battery storage plant?
Both. Solar capacity totals 150.6 MW and battery storage capacity totals 135 MW.
When did Chestnut start operating?
Its first generator began operating in December 2023, according to EIA-860M.
Does InfraMap have power prices for Chestnut?
Yes. InfraMap has CAISO day-ahead and real-time prices at 1 price node linked to Chestnut, 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)
- 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