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80 MW BESS operating in Tulare, CA — California Independent System Operator
80 MW
Nameplate Capacity
1
Generators
unit
Batteries
Technology
2024
Operating Since
Coordinates
35.8384, -119.0884
County
Tulare, CA
Nearby Plants
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | VESI 12 LLC | — | — |
| Owner(s) | VESI 12 LLC | — | — |
| Status | Operating | — | — |
Bottleneck Energy Storage is an 80 MW battery energy storage system located in Tulare County, California. The plant, which began operating in 2024, is owned and operated by VESI 12 LLC. It utilizes lithium-ion battery (LIB) technology and has a total storage capacity of 320 MWh, providing a duration of 4 hours at full output. The plant's primary fuel is listed as MWH, indicating it draws power from the grid to charge its batteries.
Bottleneck Energy Storage operates within the California Independent System Operator (CAISO) balancing authority and the Western Electricity Coordinating Council (WECC) NERC region. It ranks as the 130th largest power plant in California out of 300, and 543rd nationally out of 1205. The facility consists of a single generator.
Generated from EIA, GEM, and public data sources
ISO/RTO
CAISO
Market
ISO/RTO Member
NERC Region
WECC — Western Electricity Coordinating Council
Balancing Authority
−863 MWh
Net Charging
-13.4K MWh
Annual Net Energy
-1.9%
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.
2023
$1,361/kW
Est. Construction Cost
Total estimated cost: $108.9M
Point of Interconnection
Nearest Substation
Vestal Substation · 220 kV
Substation Distance
0.565 km
Operator
Southern California Edison
Coord Source
OSM spatial
Market Position
ISO/RTO Market
CAISO
LMP Node
REXFRD_2_RSFBX2-APND
Pricing Hub
TH_ZP26_GEN-APND
Location Type
Aggregated Node
Node Source
Curated node match
Last updated 2026-03-26
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ask pi about Bottleneck Energy StorageCalifornia Independent System Operator (CISO)
Grid Voltage
66.0 kV
Regulatory Status
NR — Non-Regulated
Entity Type
Independent Power Producer
Sector
IPP Non-CHP