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15 MW BESS operating in Ventura, CA — California Independent System Operator
15 MW
Nameplate Capacity
1
Generators
unit
Batteries
Technology
2025
Operating Since
Coordinates
34.3576, -119.0573
County
Ventura, CA
Nearby Plants
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Black Walnut Energy Storage LLC | — | — |
| Owner(s) | Black Walnut Energy Storage LLC | — | — |
| Status | Operating | — | — |
Black Walnut Energy Storage LLC, located in Ventura County, California, is a 15 MW battery energy storage facility. The plant, identified by the EIA plant code 65396, is owned and operated by Black Walnut Energy Storage LLC. It consists of a single generator utilizing battery technology and its primary fuel is electricity (MWH).
The facility operates within the California Independent System Operator (CAISO) balancing authority and the Western Electricity Coordinating Council (WECC) NERC region. Black Walnut Energy Storage is ranked as the 189th largest plant in California out of 300, and nationally it is ranked 715th out of 1205.
Generated from EIA, GEM, and public data sources
ISO/RTO
CAISO
Market
ISO/RTO Member
NERC Region
WECC — Western Electricity Coordinating Council
Balancing Authority
No generation data available for this plant.
2023
$1,361/kW
Est. Construction Cost
Total estimated cost: $20.4M
Market Position
ISO/RTO Market
CAISO
LMP Node
—
Pricing Hub
TH_SP15_GEN-APND
Node Source
Plant coordinates only
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No ask pi reports yet for this entity.
ask pi about Black Walnut Energy Storage LLCCalifornia Independent System Operator (CISO)
Grid Voltage
66.0 kV
Regulatory Status
NR — Non-Regulated
Entity Type
Independent Power Producer
Sector
IPP Non-CHP