How big is Sunlight Storage II?

Sunlight Storage II has a reported capacity of 230 MW. Source: EIA Form 860.

What kind of plant is Sunlight Storage II?

Sunlight Storage II is a batteries facility in Riverside County, CA, participating in the CAISO market.

Where is Sunlight Storage II located?

Sunlight Storage II is in Riverside County, CA, inside the CAISO balancing area.

Who operates Sunlight Storage II?

Sunlight Storage II is operated by Sunlight Storage II according to the EIA generator inventory. Reporting membership does not by itself establish ultimate ownership.

How much electricity does Sunlight Storage II generate?

Sunlight Storage II reported 278.9 GWh over the twelve months to 2026-06. For a storage plant this is reported gross generation — a discharge proxy, not a cycle count or a conventional capacity factor.

Where does Sunlight Storage II connect to the grid?

Sunlight Storage II interconnects at Southern California Edison Red Bluff Substation, on the Southern California Edison (SCE) system.

How does Sunlight Storage II compare to other plants?

By capacity, Sunlight Storage II ranks #35 of 962 operating plants of the same technology nationally. It ranks #9 of 248 in CA.

Sunlight Storage II — 230 MW battery storage, CA

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Sunlight Storage II — 230 MW battery storage, CA · Ask the Grid

Overview

Reported capacity: 230 MW
EIA-reported operating capacity; nameplate, seasonal, AC/DC, and unit ratings may differ.
Technology: Batteries
Primary generation technology.
Registry anchor: Plant 66575
Sunlight Storage II · Riverside County · CAISO
Operating status: Operating
Sunlight Storage II is operating.
Grid connection: Southern California Edison Red Bluff Substation
230 kV · Southern California Edison (SCE)
Commercial operation: April 2024
Best-supported operating milestone.

Profile

Grid role: Co-located solar-shifting energy storage: the system stores electricity from the Desert Sunlight Solar Farm and releases it when power is most needed, improving grid reliability and renewable-energy availability.
Grid connection: Southern California Edison Red Bluff Substation · 230 kV · Southern California Edison (SCE).
Physical build: Operational 230-MW battery plant in Riverside County with one EIA generating unit. The permitted build comprised a BESS on approximately 30 acres within the existing Desert Sunlight Solar Farm boundary, designed for up to 300 MW, with 34.5-kV collection lines, Desert Sunlight substation upgrades, use of existing access roads, interconnection to Southern California Edison’s Red Bluff Substation, and no off-site improvements. The project occupied approximately 52 acres including approximately 22 acres of previously graded laydown area. BLM reported the system fully operational and adding 300 MW of storage to the Desert Sunlight complex.

Structured profile

Reported capacity: 230 MW
Batteries
Commercial operation: April 2024
Operating status: operating
Sunlight Storage II is operating.
Interconnection: Southern California Edison Red Bluff Substation
230 kV · Southern California Edison (SCE)
Location: Riverside County

Related assets

Similar plants ranked by technology, capacity, and distance.

Sunlight Storage

Batteries · 230 MW

Riverside County

Same typeComparable scale23 mi away

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Big Rock Solar Farm

Batteries · 200 MW

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Same typeComparable scale74 mi away

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Units and generators

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

Generator	Capacity	Technology	Operation	Status
SUNS2	230 MW 230 MW summer	Batteries Electricity used for energy storage · BA	Apr 2024	Operating

Performance

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

Peer context

Technology capacity: 230 MW; Batteries
National rank: #35; of 962 operating peers
CA rank: #9; of 248 operating peers

Monthly generation

Download CSV

Latest 12 months

278.9 GWh

Reported gross generation

Latest report

Jun 2026

EIA-923 monthly filing

2025 net exchange

-48.4 GWh

Generation less station charging

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

CHIRIACO

IN SERVICE

17.9 km

JULIAN HINDS

Commercial, land, and environmental record

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

Land and environmental record

Environmental Permit

Apr 11, 2023

Order R7-2023-0009; WDID 7A333249001; Regulatory Measure ID 449889; Place ID 884264

These are the environmental permit and facility identifiers stated for the Sunlight Storage II Project waste-discharge requirements order by the Colorado River Basin Regional Water Quality Control Board.

Source

Environmental Review

Jul 15, 2011

CEQA environmental review milestone

The BLM prepared a Final Environmental Impact Statement for the Desert Sunlight project in 2011; the California Public Utilities Commission used that EIS in place of an EIR and filed a Notice of Determination with State Clearinghouse No. 2011044003 on July 15, 2011.

Source

Land Ownership

Apr 11, 2023

Bureau of Land Management public land

The project is sited on public lands owned by the U.S. Department of the Interior Bureau of Land Management.

Source

Waters Of State Impact

Apr 11, 2023

7,245 linear feet of permanent waters-of-state impact

The order reports 7,245 linear feet of permanent impact, with no temporary impact identified.

Source

Waters Of State Impact

Apr 11, 2023

Approximately 4.74 acres of permanent physical loss of waters of the state

The water-board order authorizes permanent impacts categorized as physical loss of area; no temporary impacts were identified.

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 / operatorRelated asset

Parties and identifiers

OrganizationRoleBasis

Timeline and sources

Project milestones and public references behind the asset profile.

Project timeline

Oct 14, 2022
Oct 14, 2022
Project Application ReceivedOrder R7-20...
The California Water Board record states that the Sunlight Storage II Project application was received on October 14, 2022 and deemed complete on December 27, 2022.
Apr 11, 2023
Apr 11, 2023

Sunlight Storage II

Sunlight Storage II

Overview

Profile

Structured profile

Related assets

Sunlight Storage

Big Rock Solar Farm

Units and generators

Performance

Peer context

Monthly generation

Grid and market context

Nearby substations

Commercial, land, and environmental record

Land and environmental record

Related parties and identifiers

Relationship graph

Parties and identifiers

Timeline and sources

Project timeline

Condor Energy Storage LLC

Gateway Energy Storage System

Desert Peak Energy Storage I

Peregrine Energy Storage LLC

Reporting portfolio

Sources

Common questions about Sunlight Storage II

How big is Sunlight Storage II?

What kind of plant is Sunlight Storage II?

Where is Sunlight Storage II located?

Who operates Sunlight Storage II?

How much electricity does Sunlight Storage II generate?

Where does Sunlight Storage II connect to the grid?

How does Sunlight Storage II compare to other plants?