Tumbleweed Energy Storage — Plant Summary
- EIA Plant ID
- 66666
- Capacity
- 125 MW
- Primary Fuel
- Battery Storage
- Technology
- Batteries
- Status
- Operating
- Location
- Kern, CA
- Operating Since
- 2024
- Generators
- 2
- Operator
- Tumbleweed Energy Storage, LLC
- Parent Company
- —
- Annual Generation
- -24,675 MWh
- Capacity Factor
- -2.3%
- Balancing Authority
- California Independent System Operator
- ISO/RTO
- CAISO
- NERC Region
- WECC
Tumbleweed Energy Storage
OperatingBESS
Ranked #43 of 191 BESS plants in CA#276 of 837 nationally
125 MW BESS operating in Kern, CA — California Independent System Operator
EIA
125 MW
Nameplate Capacity
2
Generators
units
Batteries
Technology
2024
Operating Since
Location
Coordinates
34.8343, -118.3390
County
Kern, CA
Nearby Plants
- Willow Spring Solar, LLCSolar107.9 MW · 0.9 km
- Rabbitbrush Solar, LLCBESS120 MW · 1.8 km
- Solar Star 2Solar279 MW · 2.0 km
Ownership & Operator
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Tumbleweed Energy Storage, LLC | — | — |
| Owner(s) | Tumbleweed Energy Storage, LLC | — | — |
| Status | Operating | — | — |
Ownership Chain
No GEM tracker match for this plant — ownership chain unavailable.
About
Tumbleweed Energy Storage is a 125 MW battery energy storage system located in Kern County, California. The facility, owned and operated by Tumbleweed Energy Storage, LLC, began operating in 2024. It is interconnected to the California Independent System Operator (CAISO) balancing authority within the Western Electricity Coordinating Council (WECC) region. The plant utilizes lithium-ion (LIB) battery chemistry and has a total storage capacity of 200 MWh, providing a duration of 4 hours at its full power output.
The facility consists of two generators utilizing battery technology. Tumbleweed Energy Storage is ranked as the 94th largest power plant in California out of 112, and 434th nationally out of 514. Its primary fuel source is electricity (MWH), indicating that it charges from the grid and discharges to the grid.
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 Queue2 projectsBeta
SHEATH STORAGE
WithdrawnBattery101 MWCAISO
Generation
−2.0K MWh
Net Charging
-24.7K MWh
Annual Net Energy
-2.3%
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
WILSPR2_7_N001
Pricing Hub
TH_SP15_GEN-APND
Location Type
Pricing Node
Node Source
Curated node match
News & Articles (6)Beta
Grid·capacity addition
Second eight-hour lithium-ion battery system picked in California long-duration storage procurement
A group representing community energy suppliers in California has made its second long-duration energy storage procurement, with the selected bid once again a...
Energy-Storage.News·4 years ago
Grid·capacity addition
Onward Energy to develop 400-MWh energy storage project for California CCAs
California Community Power, a joint powers agency of 10 California Community Choice Aggregators (CCAs), has approved a contract for a...
Onward Energy (developer)California Community Power (buyer)
Solar Power World·4 years ago
Industry·technology
Inside Clean Energy: In the New World of Long-Duration Battery Storage, an Old Technology Holds Its Own
California power companies choose lithium-ion batteries for an eight-hour storage project, passing on some newer options.
Inside Climate News·4 years ago
Grid·capacity addition
Eight-hour lithium-ion project wins in California long-duration energy storage procurement
Lithium-ion battery storage inside LS Power's 250MW / 250MWh Gateway project in California, part of REV Renewables' existing portfolio.
LS Power (developer)REV Renewables (operator)
Energy-Storage.News·4 years ago
Last updated 2026-03-14
View all 6 articles