Dark Sky Energy Center

OperatingBESS

Ranked #145 of 194 BESS plants in CA#756 of 963 nationally

7.3 MW BESS operating in San Diego, CA — California Independent System Operator

EIA

7.3 MW

Nameplate Capacity

Generators

unit

Batteries

Technology

2025

Operating Since

Location

Coordinates

33.2705, -116.3470

County

San Diego, CA

Nearby Plants

Borrego Springs Energy Storage
BESS1.5 MW · 0.2 km
Sellers Farm Solar
Solar5 MW · 1.9 km
Solar Borrego I
Solar26 MW · 2.4 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

Dark Sky Energy Center is a 7.3 MW battery energy storage system located in San Diego County, California. The facility began operating in 2025 and is owned by Sempra Energy, with San Diego Gas & Electric Co. acting as the operator. The plant consists of a single generator utilizing batteries as its primary fuel source (MWH). The battery system has a duration of approximately 0.97 hours.

The facility operates within the California Independent System Operator (CAISO) balancing authority and the Western Electricity Coordinating Council (WECC) NERC region. In terms of size, Dark Sky Energy Center ranks as the 214th largest power plant in California out of 300, and 908th nationally out of 1205 facilities.

Generated from EIA, GEM, and public data sources

EIA Plant Profile

Engineering & Generators

Grid Context

ISO/RTO

CAISO

Market

ISO/RTO Member

NERC Region

WECC — Western Electricity Coordinating Council

Balancing Authority

Generation

No generation data available for this plant.

Financial Data

EIA Avg CostEIA Construction Cost AveragesMEDIUM

2023

Construction CostOperating CostPricing & Revenue

$1,361/kW

Est. Construction Cost

Total estimated cost: $9.9M

Technology Average·Based on EIA averages — not plant-specific financial reports

Pricing & Market Data

MEDIUM confidence

Market Position

ISO/RTO Market

CAISO

LMP Node

—

Pricing Hub

TH_SP15_GEN-APND

Node Source

Shared substation inference

BREGGO_6_DEGRSLNearby ISO Node

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Dark Sky Energy Center — Plant Summary

Dark Sky Energy Center

Ownership Chain