Sanborn BESS 1 — Plant Summary
- EIA Plant ID
- 64712
- Capacity
- 100 MW
- Primary Fuel
- Battery Storage
- Technology
- Batteries
- Status
- Operating
- Location
- Kern, CA
- Operating Since
- 2021
- Generators
- 1
- Operator
- Terra-Gen Operating Co-BESS
- Parent Company
- —
- Annual Generation
- -16,201 MWh
- Capacity Factor
- -1.8%
- Balancing Authority
- California Independent System Operator
- ISO/RTO
- CAISO
- NERC Region
- WECC
Sanborn BESS 1
OperatingBESS
Ranked #55 of 191 BESS plants in CA#317 of 837 nationally
100 MW BESS operating in Kern, CA — California Independent System Operator
EIAWD
100 MW
Nameplate Capacity
1
Generators
unit
Batteries
Technology
2021
Operating Since
Location
Coordinates
35.0273, -118.1392
County
Kern, CA
Nearby Plants
- Sanborn BESS 3BESS169 MW · 0.0 km
- Sanborn BESS 2BESS100 MW · 0.1 km
- Edwards Sanborn S1BESS84.6 MW · 0.6 km
Ownership & Operator
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Terra-Gen Operating Co-BESS | — | — |
| Owner(s) | Terra-Gen Operating Co-BESS | — | — |
| Status | Operating | — | — |
Ownership Chain
No GEM tracker match for this plant — ownership chain unavailable.
About
Sanborn BESS 1 is a 100 MW battery energy storage system located in Kern County, California. The plant began operating in 2021 and has one generator. It is owned and operated by Terra-Gen Operating Co-BESS. The facility utilizes lithium-ion batteries (LIB) to provide 200 MWh of energy storage, equating to a storage duration of 2 hours. The plant's primary fuel is listed as MWH, indicating it draws power from the grid to charge its batteries.
Sanborn BESS 1 operates within the California Independent System Operator (CAISO) balancing authority and the Western Electricity Coordinating Council (WECC) NERC region. As of the latest rankings, it is the 110th largest power plant in California out of 112, and the 484th largest in the United States 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
MAMMOTH ENERGY STORAGE
WithdrawnBattery101.4 MWCAISO
Generation
−1.3K MWh
Net Charging
-16.2K MWh
Annual Net Energy
-1.8%
Capacity Factor
Jan 2023 – Dec 2025
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
News & Articles (10)Beta
Industry·technology
How mega batteries are unlocking an energy revolution
Vast battery units are shoring up grids and extending the use of clean power.
Financial Times·5 months ago
Grid·capacity addition
Top 5: Largest BESS Projects in the World in 2025
Here's a list of the top 5 largest BESS projects in the world based on their rated power as of now. #1 Edwards & Sanborn Rated Power: 821 MW
Saur Energy·11 months ago
General
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.
Energy-Storage.News·1 years ago
General
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.
Energy-Storage.News·1 years ago
Last updated 2026-03-26
View all 10 articles