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125 MW BESS operating in Kern, CA
125 MW
Nameplate Capacity
2
Generators
units
Batteries
Technology
2024
Operating Since
Coordinates
34.8343, -118.3390
County
Kern, CA
Nearby Plants
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| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Tumbleweed Energy Storage, LLC | — | — |
| Owner(s) | Tumbleweed Energy Storage, LLC | — | — |
| Status | Operating | — | — |
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
ISO/RTO
CAISO
Market
ISO/RTO Member
NERC Region
WECC — Western Electricity Coordinating Council
Balancing Authority
California Independent System Operator (CISO)
Grid Voltage
230.0 kV
Regulatory Status
NR — Non-Regulated
Entity Type
Independent Power Producer
Sector
IPP Non-CHP
Monthly net generation as reported to EIA-923 — useful for historical context. Confidence varies sharply by fuel type; the band above and the “About this data” button explain the caveats specific to this plant and how InfraSure’s in-house model handles them.
−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.
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2023
$1,361/kW
Est. Construction Cost
Total estimated cost: $170.1M
Forward revenue, DSCR bands, and refinancing risk projected under price, demand, and policy scenarios. Powered by InfraSure's asset cashflow stack.
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Market 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
No wholesale contracts disclosed in FERC EQR for this plant.
FERC EQR captures bilateral wholesale energy + capacity contracts ≥$1M/yr filed quarterly by jurisdictional sellers — covers renewable PPAs, thermal energy sales agreements, capacity contracts, and tolling agreements alike. Many plants don't appear: regulated-utility output flows to ratepayers via cost-of-service rather than bilateral contracts; small projects fall below the filing threshold; tax-equity-financed renewables route offtake to investors not utilities; merchant plants sell into ISO clearing markets without bilateral contracts. News-extracted buyer facts (below) may surface contracts disclosed only through announcements.
Last updated 2026-03-14
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