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20 MW BESS operating in San Diego, CA — California Independent System Operator
20 MW
Nameplate Capacity
2
Generators
units
Batteries
Technology
2024
Operating Since
Coordinates
33.2072, -117.2528
County
San Diego, CA
Nearby Plants
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | San Diego Gas & Electric Co | San Diego Gas & Electric | — |
| Owner(s) | San Diego Gas & Electric Co | Sempra Energy | — |
| Status | Operating | — | — |
Melrose BESS is a battery energy storage system located in San Diego County, California. The plant has a total capacity of 20 MW and consists of 2 generators utilizing battery technology. It began operating in 2024. The primary fuel source is electricity (MWH), indicating that the facility charges and discharges from the grid. The battery system has a storage capacity of 10 MWh, providing a duration of 1 hour. The battery chemistry is lithium-ion (LIB).
The plant is owned by Sempra Energy and operated by San Diego Gas & Electric Co (SDG&E). It operates within the California Independent System Operator (CAISO) balancing authority and the Western Electricity Coordinating Council (WECC) NERC region. Melrose BESS is ranked as the 180th largest power plant in California out of 300, and 700th nationally 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
−205 MWh
Net Charging
-2.4K MWh
Annual Net Energy
-1.4%
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: $27.2M
Market Position
ISO/RTO Market
CAISO
LMP Node
MELROSE_6_N001
Pricing Hub
TH_SP15_GEN-APND
Location Type
Pricing Node
Node Source
Curated node match
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ask pi about Melrose BESSCalifornia Independent System Operator (CISO)
Grid Voltage
12.0 kV
Regulatory Status
RE — Regulated
Entity Type
Investor-Owned Utility
Sector
Electric Utility