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300 MW BESS under construction in San Diego, CA — California Independent System Operator
300 MW
Nameplate Capacity
1
Generators
unit
Batteries
Technology
—
Operating Since
Coordinates
32.9340, -117.0380
County
San Diego, CA
Nearby Plants
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Nighthawk Energy Storage, LLC | — | — |
| Owner(s) | Nighthawk Energy Storage, LLC | — | — |
| Status | Under construction | — | — |
Nighthawk Energy Storage, LLC is a 300 MW battery energy storage system located in San Diego County, California. The plant, identified by the EIA plant code 65889, is owned and operated by Nighthawk Energy Storage, LLC. It consists of a single generator utilizing batteries as its primary fuel source, designated as MWH in the data.
The facility operates within the California Independent System Operator (CAISO) balancing authority and the Western Electricity Coordinating Council (WECC) NERC region. Nighthawk Energy Storage is ranked as the 36th largest power plant out of 112 in California, and 151st nationally out of 514 plants. Recent news coverage indicates interest in the plant's role within the electric 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
No generation data available for this plant.
2023
$1,361/kW
Est. Construction Cost
Total estimated cost: $408.3M
Market Position
ISO/RTO Market
CAISO
LMP Node
POMERADO_6_N008
Pricing Hub
TH_SP15_GEN-APND
Location Type
Pricing Node
Node Source
Curated node match
Last updated 2026-03-26
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ask pi about Nighthawk Energy Storage, LLCCalifornia Independent System Operator (CISO)
Grid Voltage
138.0 kV
Regulatory Status
NR — Non-Regulated
Entity Type
Independent Power Producer
Sector
IPP Non-CHP