How big is Sentinel Energy Center, LLC?

Sentinel Energy Center, LLC has a reported capacity of 800 MW and an energy capacity of 34.36 MWh. Source: EIA Form 860.

What kind of plant is Sentinel Energy Center, LLC?

Sentinel Energy Center, LLC is a Natural Gas Fired Combustion Turbine facility in Riverside County, CA, participating in the CAISO market.

Where is Sentinel Energy Center, LLC located?

Sentinel Energy Center, LLC is in Riverside County, CA, inside the CAISO balancing area.

Who operates Sentinel Energy Center, LLC?

Sentinel Energy Center, LLC is operated by Sentinel Energy Center LLC according to the EIA generator inventory. Reporting membership does not by itself establish ultimate ownership.

How much electricity does Sentinel Energy Center, LLC generate?

Sentinel Energy Center, LLC reported 123 GWh over the twelve months to 2026-06. Figures are net generation as filed to EIA-923.

How does Sentinel Energy Center, LLC compare to other plants?

By capacity, Sentinel Energy Center, LLC ranks #26 of 825 operating plants of the same technology nationally. It ranks #2 of 136 in CA.

Sentinel Energy Center, LLC — 800 MW gas plant, CA

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Sentinel Energy Center, LLC — 800 MW gas plant, CA · Ask the Grid

Overview

Power / energy: 800 MW / 34.36 MWh
Reported plant capacity and configuration.
Technology: Natural Gas Fired Combustion Turbine
Primary generation technology.
Registry anchor: Plant 57482
Sentinel Energy Center LLC · Riverside County · CAISO
Storage duration: 2 hours
Battery subsystem rating.
Operating status: Operating
Sentinel Energy Center, LLC is operating.
Commercial operation: May 1, 2013
Best-supported operating milestone.

Profile

Grid role: Quick-start simple-cycle peaking generation providing capacity, energy, and ancillary services in CAISO’s Los Angeles Basin Local Capacity Requirement area, with battery-backed black-start capability.
Context: Diamond Generating Corporation describes Sentinel as the largest plant of its kind in the world, using eight GE LMS100 aeroderivative combustion turbines. The facility provides quick-start peaking capacity, energy, and ancillary services to the CAISO Los Angeles Basin local-capacity-requirement area.
Physical build: The Sentinel Energy Center BESS adds 17.18 MW/34.36 MWh of LFP black-start capability inside the existing plant, with control-system and electrical-distribution modifications, associated transformers, switchgear, underground utilities, and approximately 3,100 square feet of BESS/switchgear foundations. The system comprises five SMA PCS units and ten BYD MC Cube 8+1 outdoor battery systems arranged in five BESS blocks; each block has one PCS connected to two battery systems, with 16 cabinets and two DC junction boxes per block. The original generation plant has eight GE Vernova LMS100 gas turbines.

Structured profile

Reported capacity: 800 MW
Natural Gas Fired Combustion Turbine
Energy: 34.36 MWh
2-hour storage duration
Commercial operation: May 1, 2013
Operating status: operating
Sentinel Energy Center, LLC is operating.
Location: Riverside County
CAISO

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Units and generators

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

Generator	Capacity	Technology	Operation	Status
CTG1	100 MW 100 MW summer	Natural Gas Fired Combustion Turbine Natural Gas · GT	May 2013	Operating
CTG2	100 MW 100 MW summer	Natural Gas Fired Combustion Turbine Natural Gas · GT	May 2013	Operating
CTG3	100 MW 100 MW summer	Natural Gas Fired Combustion Turbine Natural Gas · GT	May 2013	Operating
CTG4	100 MW 100 MW summer	Natural Gas Fired Combustion Turbine Natural Gas · GT	May 2013	Operating
CTG5

Performance

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

Peer context

Technology capacity: 800 MW; Natural Gas Fired Combustion Turbine
National rank: #26; of 825 operating peers
CA rank: #2; of 136 operating peers

Monthly generation

Download CSV

Latest 12 months

123 GWh

Reported net generation

Latest report

Jun 2026

EIA-923 monthly filing

2025 capacity factor

2.0%

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

UNKNOWN304580

NOT AVAILABLE · 115 kV

0.4 km

DEVERS

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

Power Purchase Agreement

Feb 2007

CPV and SCE entered a 10-year power purchase agreement in February 2007 for generation from five units; later extended to all eight units. CEC identifies the PPA as covering five units.

10 yearsCompetitive Power Ventures Holding, LLC · Southern California Edison

Sentinel Energy Center | California Energy Commission

Resource Adequacy Contract

Feb 16, 2021

SDG&E entered a resource-adequacy-only purchase agreement on February 16, 2021 for incremental capacity from the gas peaking facility: expected 47 MW, minimum 42 MW, beginning June 1, 2021 for five years.

47 MW contracted5 yearsSan Diego Gas & Electric Company · Sentinel Energy Center, LLC

Source

Land and environmental record

Air Permit

Apr 15, 2011

Permit No. South Coast AQMD Facility ID 152707; AQMD Facility Permit 152707, Revision 7; Title V facility listed with initial issue date April 15, 2011.

South Coast AQMD records identify Sentinel Energy Center LLC as Facility ID 152707. A 2024 AQMD hearing document identifies Facility Permit 152707, Revision 7. AQMD active Title V list shows initial issue date April 15, 2011.

Title V Permit Status

Emissions Controls And BACT

Mar 2, 2010

NOx controlled by selective catalytic reduction; CO and VOC controlled by oxidation catalyst; NOx and CO CEMS verify compliance.

AQMD permit identifies SCR for NOx, oxidation catalyst for CO and VOC, and CEMS for NOx and CO. BACT limits: 2.5 ppmvd NOx, 4.0 ppmv CO, 2.0 ppmvd VOC at 15% O2.

Source

Environmental Modification

Jan 25, 2024

CEC approved a 17.18 MW / 34.36 MWh lithium-iron-phosphate battery system for black-start capability on January 25, 2024.

Approved modification adds black-start capability. Battery installed in previously disturbed area; modification disturbs less than one acre and requires no new water use.

Sentinel Energy Center | California Energy Commission

Regulatory And Operating Milestone

Aug 1, 2013

CEC-certified project in unincorporated Riverside County; commercial operation began August 1, 2013.

CEC identifies docket 07-AFC-03, certification on December 1, 2010, and commercial operation on August 1, 2013.

Sentinel Energy Center | California Energy Commission

Water Permit Status

Mar 13, 2015

Stormwater construction coverage terminated effective March 13, 2015; no RWQCB permit or submittal reported for 2025.

The 2024 report states facility submitted Notice of Termination to Colorado River Basin RWQCB, effective March 13, 2015. The 2025 report states no permits were obtained from or submittals filed to the RWQCB during that reporting period.

2024 Annual Compliance Report for the Sentinel Energy Center (07-AFC-3C)

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 / operatorContractorEquipmentOfftaker

Timeline and sources

Project milestones and public references behind the asset profile.

Project timeline

Dec 1, 2010
Dec 1, 2010
CEC CertificationSentinel En...
The California Energy Commission certified the Sentinel Energy Center project.
May 2013
May 2013
Generators enter operation

Sentinel Energy Center, LLC

Sentinel 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 Sentinel Energy Center, LLC

How big is Sentinel Energy Center, LLC?

What kind of plant is Sentinel Energy Center, LLC?

Where is Sentinel Energy Center, LLC located?

Who operates Sentinel Energy Center, LLC?

How much electricity does Sentinel Energy Center, LLC generate?

How does Sentinel Energy Center, LLC compare to other plants?

Co-located assets