El Cajon Energy Storage — Plant Summary
- EIA Plant ID
- 60569
- Capacity
- 7.5 MW
- Primary Fuel
- Battery Storage
- Technology
- Batteries
- Status
- Operating
- Location
- San Diego, CA
- Operating Since
- 2017
- Generators
- 1
- Operator
- San Diego Gas & Electric Co
- Parent Company
- Sempra Energy
- Annual Generation
- -601 MWh
- Capacity Factor
- -0.9%
- Balancing Authority
- California Independent System Operator
- ISO/RTO
- CAISO
- NERC Region
- WECC
El Cajon Energy Storage
OperatingBESS
Ranked #141 of 191 BESS plants in CA#640 of 837 nationally
7.5 MW BESS operating in San Diego, CA — California Independent System Operator
EIAWD
7.5 MW
Nameplate Capacity
1
Generators
unit
Batteries
Technology
2017
Operating Since
Location
Coordinates
32.8115, -117.0505
County
San Diego, CA
Nearby Plants
- EnerSmart Murray BESSBESS18 MW · 3.5 km
- Elliott Energy StorageBESS10 MW · 3.6 km
- San Diego State UniversitySolar15.1 MW · 4.1 km
Ownership & Operator
| 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 | — | — |
Ownership Chain
About
El Cajon Energy Storage is a 7.5 MW battery energy storage system located in San Diego County, California. The plant began operating in 2017 and is owned by Sempra Energy, with San Diego Gas & Electric Co. acting as the operator. The facility utilizes batteries as its primary fuel source (MWH) and consists of a single generator. The battery energy storage system (BESS) has a storage capacity of 30 MWh, providing a duration of 4 hours. The battery chemistry is Lithium Ion (LIB).
The plant operates within the California Independent System Operator (CAISO) balancing authority and the Western Electricity Coordinating Council (WECC) NERC region. In terms of size, El Cajon Energy Storage ranks as the 213th largest plant in California out of 300, and 902nd nationally out of 1205.
Generated from EIA, GEM, and public data sources
Engineering & Generators
Grid Context
NERC Region
WECC
Balancing Authority
California Independent System Operator
Grid Voltage
12.5 kV
Regulatory Status
RE
Entity Type
Investor-Owned Utility
Sector
Electric Utility
Generation
−54 MWh
Net Charging
-601 MWh
Annual Net Energy
-0.9%
Capacity Factor
Jan 2023 – Dec 2025
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.
Financial Data
No financial data available for this plant.
Pricing & Market Data
MEDIUM confidencePoint of Interconnection
Nearest Substation
Murray Substation · 69 kV
Substation Distance
3.434 km
Operator
San Diego Gas & Electric
Coord Source
OSM spatial
Market Position
ISO/RTO Market
CAISO
LMP Node
MURRAY_6_N015
Pricing Hub
TH_SP15_GEN-APND
Location Type
Pricing Node
Node Source
Curated node match
News & Articles (6)Beta
General
SDG&E Expands Energy Storage Capabilities to Enhance Grid Resiliency and Affordability for Customers
SAN DIEGO, March 14, 2025 /PRNewswire/ -- San Diego Gas & Electric (SDG&E) announced today the California Public Utilities Commission (CPUC)...
Sempra·1 years ago
General
Sempra Energy's (SRE) Arm Unveils 320 MW Wind Project in Mexico
Sempra Energy's SRE subsidiary, Sempra Infrastructure, recently revealed its final investment decision for the development, construction and...
Nasdaq·2 years ago
General
SDG&E Completes Large Energy Storage Facilities in Fallbrook and Imperial Valley
San Diego Gas & Electric has finished two energy storage facilities totaling 171 megawatts in Fallbrook and Imperial Valley,...
Times of San Diego·2 years ago
General
SDG&E Completes Large Energy Storage Facilities in Fallbrook and Imperial Valley
San Diego Gas & Electric has finished two energy storage facilities totaling 171 megawatts in Fallbrook and Imperial Valley,...
Times of San Diego·2 years ago
Last updated 2026-03-26
View all 6 articles