Big Rock Solar Farm
Battery storage project in Imperial County, California. 200 MW of nameplate capacity across 1 generator, operated by Big Rock ESS Assets, LLC.
Also known as EIA plant 64636
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 200 MWNameplate
- Generators
- 1 operatingEIA-860M, August 2026
- Operating since
- May 2025First generator online
- Operator
- Big Rock ESS Assets, LLCEIA operator ID 64244
- Grid
- CAISOBalancing authority CISO
- Price nodes
- 1 CAISO nodeResource nodes with prices
- Location
- Imperial County, CA32.7334, −115.7137
- EIA plant ID
- 64636EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Big Rock Solar Farm produces
Free · EIA-923Net generation, 2025
−14.6 GWh
−14,640 MWh, final. 8 of 12 months reported
Battery discharge, 2025
61.4 GWh
Charge 76.0 GWh
January to July 2026
−17.7 GWh
Provisional
| 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 | Not reported | Not reported | 0 of 12 |
| 2025 | −14,640 | Not reported | 8 of 12 |
| 2026 (provisional, partial year) | −17,683 | Not reported | 7 of 7 |
* 2026 covers January to July and is provisional. Battery plants can report negative net generation, when charging uses more energy than they discharge.
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 |
|---|---|---|---|
| 92JTB | Batteries | 200.0 | May 2025 |
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 Big Rock ESS Assets, LLC as the operator, which is not always the owner.
Modeled data
ProPro adds modeled values for this plant. Everything above stays free.
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Questions about Big Rock Solar Farm
How much power does Big Rock Solar Farm produce?
Big Rock Solar Farm reported −14,640 MWh (−14.6 GWh) of net generation in 2025. From January to July 2026 it reported −17.7 GWh, which is provisional. 8 of 12 months were reported for 2025.
Where is Big Rock Solar Farm?
Big Rock Solar Farm is in Imperial County, California, at 32.7334, −115.7137. It is in the California Independent System Operator balancing area (CISO).
Who operates Big Rock Solar Farm?
EIA-860M for August 2026 lists Big Rock ESS Assets, LLC as the operator (EIA operator ID 64244). The operator is not always the owner.
When did Big Rock Solar Farm start operating?
Its first generator began operating in May 2025, according to EIA-860M.
Does InfraMap have power prices for Big Rock Solar Farm?
Yes. InfraMap has CAISO day-ahead and real-time prices at 1 price node linked to Big Rock Solar Farm, 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