Sanborn BESS 4 — Plant Summary
- EIA Plant ID
- 65673
- Capacity
- 47 MW
- Primary Fuel
- Battery Storage
- Technology
- Batteries
- Status
- Operating
- Location
- Kern, CA
- Operating Since
- 2023
- Generators
- 1
- Operator
- Terra-Gen Operating Co-BESS
- Parent Company
- —
- Annual Generation
- -9,996 MWh
- Capacity Factor
- -2.4%
- Balancing Authority
- California Independent System Operator
- ISO/RTO
- CAISO
- NERC Region
- WECC
Sanborn BESS 4
OperatingBESS
Ranked #92 of 191 BESS plants in CA#415 of 837 nationally
47 MW BESS operating in Kern, CA — California Independent System Operator
EIA
47 MW
Nameplate Capacity
1
Generators
unit
Batteries
Technology
2023
Operating Since
Location
Coordinates
34.9581, -118.1078
County
Kern, CA
Nearby Plants
- Edwards Sanborn E1BBESS290.4 MW · 1.4 km
- Edwards Sanborn E1ABESS293.3 MW · 1.6 km
- Edwards Sanborn E3BESS38.1 MW · 2.1 km
Ownership & Operator
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Terra-Gen Operating Co-BESS | — | — |
| Owner(s) | EdSan 1B Group 2, LLC | — | — |
| Status | Operating | — | — |
Ownership Chain
No GEM tracker match for this plant — ownership chain unavailable.
About
Sanborn BESS 4 is a 47 MW battery energy storage system located in Kern County, California. The plant began operating in 2023 and has one generator. It is owned and operated by Terra-Gen Operating Co-BESS. The facility utilizes lithium-ion (LIB) batteries with a total storage capacity of 188 MWh, providing a duration of 4 hours.
The plant operates within the California Independent System Operator (CAISO) balancing authority and the Western Electricity Coordinating Council (WECC) NERC region. Sanborn BESS 4 ranks as the 159th largest power plant in California out of 300, and 622nd nationally out of 1205. The plant's primary fuel is listed as MWH, indicating it draws power from the grid to charge its batteries.
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
Generation
−1.8K MWh
Net Charging
-10.0K MWh
Annual Net Energy
-2.4%
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
MEDIUM confidenceMarket Position
ISO/RTO Market
CAISO
LMP Node
—
Pricing Hub
TH_SP15_GEN-APND
Node Source
Shared substation inference
PHSP15Nearby ISO Node
PHSP15Substation
PHSP15Substation
News & Articles (9)Beta
Grid·outage
How mega batteries are unlocking an energy revolution
As the evening drew in on a sweltering mid-August day in 2020, California's strained electricity grid buckled. Amid an intense heatwave,...
California (other)
Financial Times·5 months ago
Industry·technology
Top 5: Largest BESS Projects in the World in 2025
Of the top 5 largest BESS projects, 4 are from the US. This Middle Eastern Nation made it to the list with its 500 GW / 2000 MWh project.
US (other)
Saur Energy·11 months ago
Deals·other
LG Energy Solution’s system integrator arm signs 8GWh BESS deal with Terra-Gen
The US battery storage system integrator arm of Korean battery manufacturer LG Energy Solution (LG ES) has signed a 4-year supply deal with developer Terra-Gen.
LG Energy Solution (seller)Terra-Gen (buyer)
Energy-Storage.News·1 years ago
Grid·capacity addition
Calpine to bring majority of 680MW California BESS online this summer
Gas and geothermal plant operator Calpine Corporation will bring 510MW of its 680MW capacity battery energy storage system (BESS) project in...
Calpine (operator)California (other)
Energy-Storage.News·1 years ago
Last updated 2026-03-14
View all 9 articles