How big is Diablo Energy Storage?

Diablo Energy Storage has a reported capacity of 200 MW and an energy capacity of 800 MWh. Source: EIA Form 860.

What kind of plant is Diablo Energy Storage?

Diablo Energy Storage is a batteries facility in Contra Costa County, CA, participating in the CAISO market.

Where is Diablo Energy Storage located?

Diablo Energy Storage is in Contra Costa County, CA, inside the CAISO balancing area.

Who operates Diablo Energy Storage?

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

How much electricity does Diablo Energy Storage generate?

Diablo Energy Storage reported 199.8 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 Diablo Energy Storage connect to the grid?

Diablo Energy Storage interconnects at Pittsburg 230 kV Substation.

How does Diablo Energy Storage compare to other plants?

By capacity, Diablo Energy Storage ranks #48 of 962 operating plants of the same technology nationally. It ranks #13 of 248 in CA.

Diablo Energy Storage — 200 MW battery storage, CA

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Diablo Energy Storage — 200 MW battery storage, CA · Ask the Grid

Overview

Power / energy: 200 MW / 800 MWh
Reported plant capacity and configuration.
Technology: Batteries
Primary generation technology.
Registry anchor: Plant 62175
Diablo Energy Storage, LLC · Contra Costa County · CAISO
Storage duration: 4 hours
Battery subsystem rating.
Operating status: Operating
Diablo Energy Storage is operating.

Profile

Grid role: Transmission-connected, stand-alone lithium-ion battery energy-storage resource procured under PG&E system-reliability agreements, with a four-hour discharge duration.
Physical build: The 200 MW/approximately 800 MWh, 4-hour lithium-ion BESS in Pittsburg includes a 230 kV onsite substation and approximately 1.2 miles of underground/overhead gen-tie connection to PG&E’s Pittsburg substation. Sargent Electric’s documented scope included 34.5 kV underground construction, ground grid installation, below-grade duct banks, above-grade battery-cube assembly, DC and auxiliary power systems, and fiber-optic communications. No exact installed equipment-unit counts are disclosed in the cited project sources.

Structured profile

Reported capacity: 200 MW
Batteries
Energy: 800 MWh
4-hour storage duration
Operating status: operating
Diablo Energy Storage is operating.
Location: Contra Costa County
CAISO
Operator: Diablo Energy Storage, LLC

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Units and generators

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

Generator	Capacity	Technology	Operation	Status
DIBLO	200 MW 200 MW summer	Batteries Electricity used for energy storage · BA	Apr 2022	Operating

Performance

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

Peer context

Technology capacity: 200 MW; Batteries
National rank: #48; of 962 operating peers
CA rank: #13; of 248 operating peers

Monthly generation

Download CSV

Latest 12 months

199.8 GWh

Reported gross generation

Latest report

Jun 2026

EIA-923 monthly filing

2025 net exchange

-35.9 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

PITTSBURG

IN SERVICE · 230 kV

1.0 km

KIRKER TAP 2

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 Review

Feb 13, 2018

SCH Number 2018022028; Mitigated Negative Declaration

California CEQA records identify City of Pittsburg as lead agency and environmental document as Mitigated Negative Declaration for Diablo Energy Storage.

Diablo Energy Storage

Environmental Setting

2018

Suisun Bay

CEQA record lists Suisun Bay as project-area waterway; geographic environmental setting designation only. No evidence that battery facility uses Suisun Bay for cooling or process water.

Diablo Energy Storage

Project Site Area

2018

Approximately 12 acres

Project occupies approximately 12-acre graded, vacant site, portion of 35-acre Empire Business Park property.

Diablo Energy Storage - Notice of Intent | News | City of Pittsburg

Site Location And Parcel

Feb 8, 2018

701 Willow Pass Road, Pittsburg, California 94565; Contra Costa County; APN 085-280-010

Official City of Pittsburg notice identifies exact Diablo Energy Storage project location and assessor's parcel number.

Diablo Energy Storage - Notice of Intent | News | City of Pittsburg

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

Drag organizations to explore the network. Select a node to pin its details and available page link.

AssetOwner / operatorEquipment

Parties and identifiers

Timeline and sources

Project milestones and public references behind the asset profile.

Project timeline

Nov 16, 2017
Nov 16, 2017
Interconnection Agreement ExecutedSource
The WECC progress report identifies November 16, 2017 as the date the Diablo interconnection agreement was executed.
Feb 8, 2018
Feb 8, 2018
Municipal project approval process initiated

Diablo Energy Storage

Diablo Energy Storage

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

Land and environmental record

Related parties and identifiers

Relationship graph

Parties and identifiers

Timeline and sources

Project timeline

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Reporting portfolio

Sources

Common questions about Diablo Energy Storage

How big is Diablo Energy Storage?

What kind of plant is Diablo Energy Storage?

Where is Diablo Energy Storage located?

Who operates Diablo Energy Storage?

How much electricity does Diablo Energy Storage generate?

Where does Diablo Energy Storage connect to the grid?

How does Diablo Energy Storage compare to other plants?

Co-located assets