How big is Palomar Energy?

Palomar Energy has a reported capacity of 559 MW. Source: EIA Form 860.

What kind of plant is Palomar Energy?

Palomar Energy is a Natural Gas Fired Combined Cycle facility in San Diego County, CA, participating in the CAISO market.

Where is Palomar Energy located?

Palomar Energy is in San Diego County, CA, inside the CAISO balancing area.

Who operates Palomar Energy?

Palomar Energy is operated by San Diego Gas & Electric Co according to the EIA generator inventory. Reporting membership does not by itself establish ultimate ownership.

How much electricity does Palomar Energy generate?

Palomar Energy reported 1,294.2 GWh over the twelve months to 2026-04. Figures are net generation as filed to EIA-923.

Where does Palomar Energy connect to the grid?

Palomar Energy interconnects at Palomar Energy, on the San Diego Gas & Electric system.

How does Palomar Energy compare to other plants?

By capacity, Palomar Energy ranks #278 of 538 operating plants of the same technology nationally. It ranks #21 of 64 in CA.

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Natural Gas Fired Combined CycleCAISO · San Diego County

Palomar Energy

San Diego Gas & Electric Company · San Diego County · CAISO

Palomar Energy is a natural gas-fired power facility with 559 MW of EIA-reported nameplate capacity in San Diego County, California, registered as EIA Plant ID 55985. San Diego Gas & Electric Company owns and operates the plant. The plant's generating configuration is natural-gas-fired combined-cycle plant with two GE 7FA combustion-turbine generators, two duct-fired heat-recovery steam generators, and one reheat condensing steam-turbine generator.

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Asset analyst

plant:plant-55985

Ask about Palomar Energy

Investigate technology, capacity, output, price behavior, ownership, and related facilities using this profile plus current grid data.

Overview

Key fields

Reported capacity: 559 MW
EIA-reported nameplate capacity; other nameplate and seasonal ratings may differ.
Technology: Natural Gas Fired Combined Cycle
Primary generation technology.
Registry anchor: Plant 55985
San Diego Gas & Electric Co · San Diego County · CAISO
Operating status: Operating
Palomar Energy is currently operating; a closure or retirement is listed for 2026.
Grid connection: Palomar Energy
230 kV · San Diego Gas & Electric
Commercial operation: April 1, 2006
Best-supported operating milestone.

Profile

Operating status: Palomar Energy is currently operating; a closure or retirement is listed for 2026.
Grid role: Firm, dispatchable combined-cycle generation resource supporting electric-system reliability.
Grid connection: Palomar Energy · 230 kV · San Diego Gas & Electric.
Physical build: Palomar Energy is a natural-gas combined-cycle plant comprising two GE combustion turbine-generators, two multi-pressure HRSGs with duct burners, two HRSG exhaust stacks, one reheat condensing steam turbine-generator, SCR and oxidation-catalyst emissions controls, inlet-air cooling, a wet cooling tower, associated transformers and auxiliary systems, and a 230-kV switchyard. Later modifications replaced the evaporative inlet coolers with three refrigeration inlet-air chillers and added a thermal-energy-storage tank.

Structured profile

Reported capacity: 559 MW
Natural Gas Fired Combined Cycle
Commercial operation: April 1, 2006
Operating status: operating
Palomar Energy is currently operating; a closure or retirement is listed for 2026.
Retirement: 2026
Palomar Energy is currently operating; a closure or retirement is listed for 2026.
Interconnection

Units and generators

Operating generator records and technology attributes reported through EIA-860.

Generator	Capacity	Technology	Operation	Status
CTG1	165 MW 179.6 MW summer	Natural Gas Fired Combined Cycle Natural Gas · CT	Oct 2005	Operating
CTG2	165 MW 179.8 MW summer	Natural Gas Fired Combined Cycle Natural Gas · CT	Nov 2005	Operating
STG	229 MW 222 MW summer	Natural Gas Fired Combined Cycle Natural Gas · CA	Jan 2006	Operating

Performance

Monthly EIA generation history and recent market-resource behavior where linked telemetry is available.

Peer context

Technology capacity: 559 MW
National rank: #278
CA rank: #21

Monthly generation

Download CSV

Latest 12 months

1.29 TWh

Reported net generation

Latest report

Apr 2026

EIA-923 monthly filing

2025 capacity factor

30.0%

Grid and market context

Deterministic links to ERCOT market resources, price records, outage disclosures, queue records, and nearby infrastructure. Candidate joins remain labeled until corroborated.

Nearby substations

HIFLD infrastructure inventory

CALPEAK PE 7

NOT AVAILABLE · 230 kV

0.1 km

ESCONDIDO

Commercial, land, and environmental record

Source-backed project transactions, agreements, land records, permits, and environmental disclosures. Portfolio and adjacent-project facts remain explicitly scoped.

Financing

Public Funding

Date not disclosed

Nanogrid and hydrogen export panel at Palomar Energy Center funded through Electric Program Investment Charge (EPIC) by California utility customers under California Public Utilities Commission auspices. Cited record does not disclose funding amount or date; stated as not included in application cost.

California utility customers · California Public Utilities Commission

Source

Transactions and agreements

Acquisition Agreement

Jan 2004

SDG&E entered into Turnkey Acquisition Agreement with Palomar Energy, LLC (subsidiary of Sempra Energy Resources) to acquire and operate Palomar Energy Center as utility-owned generation asset. Acquisition completed June 1, 2006. CPUC cited record does not disclose purchase consideration.

San Diego Gas & Electric Company · Palomar Energy, LLC

D0508005 Aproving Application

Land and environmental record

Regulatory Authority

Aug 6, 2003

California Energy Commission

Project was certified by CEC on August 6, 2003 under Docket 01-AFC-24 and began commercial operation April 1, 2006. CEC certificate supersedes any permit, certificate, or similar document otherwise required by any state, local, regional, or federal agency to extent permitted by federal law.

Palomar Energy Project | California Energy Commission

Related parties and identifiers

Parties, market resources, and identifiers tied to this asset, with owner, operator, developer, EPC, compliance provider, and interconnecting entity roles kept separate.

Relationship graph

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AssetOwner / operatorContractorOrganizationFinancier

Timeline and sources

Project milestones and public references behind the asset profile.

Project timeline

Nov 28, 2001
Nov 28, 2001
Application for certification filedSource
Palomar Energy, LLC, a wholly owned subsidiary of Sempra Energy Resources, filed the Application for Certification for the Palomar Energy Project.
Aug 6, 2003
Aug 6, 2003

Reporting portfolio

EIA reporting entity

San Diego Gas & Electric Co

Entity 16609

Operating portfolio

17 plants

1 states

Reported capacity

902.8 MW

Batteries · Natural Gas Fired Combined Cycle · Natural Gas Fired Combustion Turbine

Largest reported plants in this portfolio
Largest reported plants	Capacity	State
Palomar EnergyCurrent	559 MW	CA
Miramar Energy Facility	106 MW	CA
Cuyamaca Peak Energy Plant	48.7 MW	CA
Fallbrook Energy Storage	40 MW	CA
Top Gun Energy Storage	30 MW	CA
Melrose BESS	20 MW	CA
Elliott Energy Storage	10 MW	CA
Boulevard Energy Storage	10 MW	CA

Portfolio membership follows the latest EIA-860 reporting entity. It does not imply ultimate ownership.

View full reporting portfolio

Ask about Palomar Energy

Ask about Palomar Energy

Overview

Key fields

Profile

Structured profile

Units and generators

Performance

Peer context

Monthly generation

Grid and market context

Nearby substations

Commercial, land, and environmental record

Financing

Transactions and agreements

Land and environmental record

Related parties and identifiers

Relationship graph

Timeline and sources

Project timeline

Parties and identifiers

Reporting portfolio

Sources

Common questions about Palomar Energy

How big is Palomar Energy?

What kind of plant is Palomar Energy?

Where is Palomar Energy located?

Who operates Palomar Energy?

How much electricity does Palomar Energy generate?

Where does Palomar Energy connect to the grid?

How does Palomar Energy compare to other plants?

Co-located assets

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