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559 MW Natural Gas operating in San Diego, CA — California Independent System Operator
559 MW
Nameplate Capacity
3
Generators
units
Natural Gas Fired Combined Cycle
Technology
2005
Operating Since
Coordinates
33.1197, -117.1178
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 | — | — |
Palomar Energy is a 559 MW natural gas-fired combined cycle power plant located in San Diego County, California. The plant began operating in 2005 and consists of 3 generators. It is owned by Sempra Energy and operated by San Diego Gas & Electric Co. The plant operates within the California Independent System Operator (CAISO) balancing authority, within the Western Electricity Coordinating Council (WECC) NERC region.
In the latest year of reported generation data, Palomar Energy produced 1,469,615 MWh of electricity, achieving a capacity factor of 30.0%. According to available data, the installed cost of the plant was $1,048.64 per kW. Palomar Energy ranks as the 27th largest power plant out of 76 in California, and 440th out of 945 nationally.
Generated from EIA, GEM, and public data sources
ISO/RTO
CAISO
Market
ISO/RTO Member
NERC Region
WECC — Western Electricity Coordinating Council
Balancing Authority
California Independent System Operator (CISO)
Grid Voltage
230.0 kV
Regulatory Status
RE — Regulated
Entity Type
Investor-Owned Utility
Sector
Electric Utility
62.5K MWh
Latest Month
1.5M MWh
Annual Generation
30.0%
Capacity Factor
CO₂ Intensity
840 lb/MWh
NOx
0.045 lb/MWh
SO₂
0.004 lb/MWh
CH₄
0.015 lb/MWh
N₂O
0.002 lb/MWh
Capacity Factor
26.1%
Annual Net Gen
1279 GWh
CO₂eq
841 lb/MWh
Subregion
WECC California
Combined cycle · San Diego Gas & Electric Company · Data from 2015–2024
$1,101/kW
Installed Cost
$9/kW
Annual CapEx
$58.4/MWh
Operating Cost
Annual Capital & Operating Expenses
Cumulative Installed Cost
Per-Unit Cost Trends
Market Position
ISO/RTO Market
CAISO
LMP Node
PALOMR_2_PL1X3-APND
Pricing Hub
TH_SP15_GEN-APND
Location Type
Aggregated Node
Node Source
EIA-860 direct report
Last updated 2026-04-09
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