How big is El Segundo Energy Center LLC?

El Segundo Energy Center LLC has a reported capacity of 537.4 MW. Source: EIA Form 860.

What kind of plant is El Segundo Energy Center LLC?

El Segundo Energy Center LLC is a Natural Gas Fired Combined Cycle facility in Los Angeles County, CA, participating in the CAISO market.

Where is El Segundo Energy Center LLC located?

El Segundo Energy Center LLC is in Los Angeles County, CA, inside the CAISO balancing area.

Who operates El Segundo Energy Center LLC?

El Segundo Energy Center LLC is operated by NRG Energy Services LLC according to the EIA generator inventory. Reporting membership does not by itself establish ultimate ownership.

How much electricity does El Segundo Energy Center LLC generate?

El Segundo Energy Center LLC reported 47.1 GWh over the twelve months to 2026-06. Figures are net generation as filed to EIA-923.

How does El Segundo Energy Center LLC compare to other plants?

By capacity, El Segundo Energy Center LLC ranks #298 of 538 operating plants of the same technology nationally. It ranks #23 of 64 in CA.

El Segundo Energy Center LLC — 537 MW gas plant, CA

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El Segundo Energy Center LLC — 537 MW gas plant, CA · Ask the Grid

Overview

Reported capacity: 537.4 MW
EIA-reported nameplate capacity; other nameplate and seasonal ratings may differ.
Technology: Natural Gas Fired Combined Cycle
Primary generation technology.
Registry anchor: Plant 57901
NRG Energy Services LLC · Los Angeles County · CAISO
Operating status: Operating

Profile

Grid role: Flexible, rapid-response combined-cycle generation serving peaking and intermediate load; the facility was designed for fast starts and non-spinning reserve service.
Physical build: Two Siemens Flex-Plant 10 combined-cycle power islands were built at El Segundo. Each power block includes one SGT6-5000F gas turbine, one SST-800 steam turbine, one SGen6-1000A generator, one SGen6-100A-2P generator, one heat-recovery steam generator, and one air-cooled heat exchanger—two of each across the project. NEM supplied the two DrumPlus HRSGs. Siemens also supplied the complete electrical equipment and SPPA-T3000 instrumentation and control system. The facility is dry-cooled and the two new units.

Structured profile

Reported capacity: 537.4 MW
Natural Gas Fired Combined Cycle
Operating status: operating
El Segundo Energy Center LLC is operating.
Location: Los Angeles County
CAISO
Operator: NRG Energy Services LLC
Asset role: natural gas
CAISO · Los Angeles County

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Units and generators

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

Generator	Capacity	Technology	Operation	Status
5	198 MW 195 MW summer	Natural Gas Fired Combined Cycle Natural Gas · CT	Aug 2013	Operating
6	70.7 MW 60 MW summer	Natural Gas Fired Combined Cycle Natural Gas · CA	Aug 2013	Operating
7	198 MW 195 MW summer	Natural Gas Fired Combined Cycle Natural Gas · CT	Jul 2013	Operating
8	70.7 MW 60 MW summer	Natural Gas Fired Combined Cycle Natural Gas · CA	Jul 2013	Operating

Performance

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

Peer context

Technology capacity: 537.4 MW; Natural Gas Fired Combined Cycle
National rank: #298; of 538 operating peers
CA rank: #23; of 64 operating peers

Monthly generation

Download CSV

Latest 12 months

47.1 GWh

Reported net generation

Latest report

Jun 2026

EIA-923 monthly filing

2025 capacity factor

1.0%

Using current reported nameplate capacity

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

EL SEGUNDO

IN SERVICE · 230 kV

0.3 km

WESTHILL

Commercial, land, and environmental record

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

Transactions and agreements

Exact-Asset Ownership Transfer

Aug 2008

Ownership and operational control of the El Segundo Power Redevelopment Project transferred to El Segundo Energy Center LLC. No transfer consideration disclosed.

El Segundo Power Redevelopment Project · El Segundo Energy Center LLC

El Segundo Energy Center | California Energy Commission

Offtake Agreement Executed

Mar 5, 2008

SCE and El Segundo Energy Center LLC executed a ten-year power purchase tolling agreement for up to 550 MW of expected contract capacity and associated energy from the facility.

550 MW contracted10 yearsSouthern California Edison Company · El Segundo Energy Center LLC

D1010029/A0804011 Granting Petition by SoCal Edison for Modification of D0809041.

Construction Management Agreement

Mar 31, 2011

Construction Management Agreement between El Segundo Energy Center LLC and NRG Construction LLC.

El Segundo Energy Center LLC · NRG Construction LLC

YieldCo Ex 10.3 Q2 14

Tolling-Agreement Amendment

Feb 16, 2021

Amendment No. 3 to Amended and Restated Power Purchase Tolling Agreement. Covers up to 37.66 MW incremental capacity for delivery June 1, 2021 through July 31, 2023 (2 years 2 months).

37.66 MW contracted2.17 yearsSouthern California Edison Company · El Segundo Energy Center LLC

Source

Offtake Agreement Executed

Aug 25, 2022

Clearway contracted for El Segundo Energy Center to sell Resource Adequacy to SCE commencing August 2023. Agreement covers 100% of facility's net qualifying capacity for three-year tenor. Capacity in MW not disclosed in source.

3 yearsClearway Energy, Inc. · Southern California Edison Company · El Segundo Energy Center LLC

Clearway Energy, Inc. Announces Resource Adequacy Agreement for El Segundo Energy Center | Clearway Energy, Inc.

Land and environmental record

Air Permit

May 12, 2021

Permit No. South Coast AQMD Title V permit; Facility ID 115663; Application No. 627771-Title V Revision

South Coast AQMD Title V de minimis significant permit revision for El Segundo Energy Center LLC, Facility ID 115663, at 301 Vista del Mar, Application No. 627771, dated May 12, 2021.

Statement of Basis - ESEC LLC Title V De Minimis Permit Revision

Cooling Water Waste

Jun 30, 2010

Air-cooled/dry cooling with zero-liquid-discharge water-cycle management

CEC-approved modification replaced originally approved once-through ocean-cooling system with air-cooled condensers. Zero liquid discharge (ZLD) system recycles or reuses water/steam-cycle wastewater to eliminate once-through cooling and industrial wastewater discharges to Santa Monica Bay.

Source

Easement Record

Jul 15, 2011

Amended and Restated Easement Agreement between El Segundo Energy Center LLC and El Segundo Power II LLC

SEC filing identifies Amended and Restated Easement Agreement dated July 15, 2011.

YieldCo Ex 10.3 Q2 14

Environmental Certification

Jul 1, 2010

CEC Docket 00-AFC-14; certified July 1, 2010; commercial operation began August 1, 2013

CEC certified the El Segundo Power Redevelopment Project on July 1, 2010 and began commercial operation on August 1, 2013. Facility is described as four-unit, natural-gas-fired, dry-cooled combined-cycle plant.

El Segundo Energy Center | California Energy Commission

Environmental Compliance Milestone

Mar 16, 2026

Proposed short variance for NERC testing: up to 10 hours; NOx and CO limits relief during low-load catalyst warm-up

AQMD Hearing Board record describes proposed short variance for Unit 5 / Device D67 during required NERC performance testing. Temporary relief concerns NOx and CO limits during low-load testing when catalyst temperatures below effective activation range (March 16-31, 2026, up to 10 hours). CEMS monitoring and post-test reporting required.

Source

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 / operatorEquipmentOrganizationContractorOfftaker

Timeline and sources

Project milestones and public references behind the asset profile.

Project timeline

Nov 1997
Nov 1997
Predecessor-Site AcquisitionEdison Sell...
Southern California Edison announced the sale of its gas-fired generating plants; NRG Energy and Destec Energy together purchased the El Segundo station/site for $87.75 million.
1998
1998

El Segundo Energy Center LLC

El Segundo Energy Center LLC

Overview

Profile

Structured profile

Related assets

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Units and generators

Performance

Peer context

Monthly generation

Grid and market context

Nearby substations

Commercial, land, and environmental record

Transactions and agreements

Land and environmental record

Related parties and identifiers

Relationship graph

Timeline and sources

Project timeline

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Parties and identifiers

Reporting portfolio

Sources

Common questions about El Segundo Energy Center LLC

How big is El Segundo Energy Center LLC?

What kind of plant is El Segundo Energy Center LLC?

Where is El Segundo Energy Center LLC located?

Who operates El Segundo Energy Center LLC?

How much electricity does El Segundo Energy Center LLC generate?

How does El Segundo Energy Center LLC compare to other plants?

Co-located assets