Big Rock Solar Farm — Plant Summary
- EIA Plant ID
- 64636
- Capacity
- 200 MW
- Primary Fuel
- Battery Storage
- Technology
- Batteries
- Status
- Operating
- Location
- Imperial, CA
- Operating Since
- 2025
- Generators
- 1
- Operator
- Big Rock ESS Assets, LLC
- Parent Company
- —
- Annual Generation
- -14,640 MWh
- Capacity Factor
- -1.2%
- Balancing Authority
- California Independent System Operator
- ISO/RTO
- CAISO
- NERC Region
- WECC
Big Rock Solar Farm
OperatingBESS
Ranked #28 of 191 BESS plants in CA#161 of 837 nationally
200 MW BESS operating in Imperial, CA — California Independent System Operator
EIA
200 MW
Nameplate Capacity
1
Generators
unit
Batteries
Technology
2025
Operating Since
Location
Coordinates
32.7334, -115.7137
County
Imperial, CA
Nearby Plants
- CED West Side Canal Battery StorageBESS131 MW · 0.6 km
- Kingsley Solar FarmBESS299 MW · 2.2 km
- Campo Verde SolarSolar147.4 MW · 2.5 km
Ownership & Operator
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Big Rock ESS Assets, LLC | — | — |
| Owner(s) | Big Rock ESS Assets, LLC | — | — |
| Status | Operating | — | — |
Ownership Chain
No GEM tracker match for this plant — ownership chain unavailable.
About
Big Rock Solar Farm is a 200 MW battery energy storage system (BESS) located in Imperial County, California. The facility, owned and operated by Big Rock ESS Assets, LLC, commenced operations in 2025. It consists of a single generator utilizing batteries as its primary fuel source, with a storage duration of one hour.
The plant operates within the California Independent System Operator (CAISO) balancing authority and the Western Electricity Coordinating Council (WECC) NERC region. Big Rock Solar Farm ranks as the 63rd largest energy storage facility in California out of 112, and 311th nationally out of 514.
Generated from EIA, GEM, and public data sources
Engineering & Generators
Grid Context
NERC Region
WECC
Balancing Authority
California Independent System Operator
Grid Voltage
230 kV
Regulatory Status
NR
Entity Type
Independent Power Producer
Sector
IPP Non-CHP
Interconnection Queue1 projectBeta
BIG ROCK SOLAR FARM
OperationalBattery200 MWCAISO
Generation
−2.0K MWh
Net Charging
-14.6K MWh
Annual Net Energy
-1.2%
Capacity Factor
Positive values indicate net discharge (generation exceeds station load). Negative values indicate net charging. Pure battery storage plants are typically net negative due to round-trip efficiency losses.
Financial Data
No financial data available for this plant.
Pricing & Market Data
HIGH confidenceMarket Position
ISO/RTO Market
CAISO
LMP Node
WESCAN_7_N002
Pricing Hub
TH_SP15_GEN-APND
Location Type
Pricing Node
Node Source
Curated node match
News & Articles (1)Beta
Industry·corporate
Enerfin Energy plans Big Rock Solar Farm west of High River
Enerfin Energy Company is proposing a 430 acre /90 megawatt solar farm on the Archie and Janet Hogg Park road, 64th Avenue West, and the corner of 466 Ave West.
Enerfin Energy Company (developer)
High River Times·2 years ago
Last updated 2026-03-14
View all articles