How big is Platinum Storage?

Platinum Storage has a reported capacity of 348 MW and an energy capacity of 380 MWh. Source: EIA Form 860.

What kind of plant is Platinum Storage?

Platinum Storage is a batteries facility in Fannin County, TX, participating in the ERCOT market.

Where is Platinum Storage located?

Platinum Storage is in Fannin County, TX, inside the ERCOT balancing area.

Who operates Platinum Storage?

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

How much electricity does Platinum Storage generate?

Platinum Storage reported 40.3 GWh over the twelve months to 2026-04. For a storage plant this is reported gross generation — a discharge proxy, not a cycle count or a conventional capacity factor.

Where does Platinum Storage connect to the grid?

Platinum Storage interconnects at Valley South Switching Station, on the Oncor Electric Delivery Company LLC system.

How does Platinum Storage compare to other plants?

By capacity, Platinum Storage ranks #8 of 962 operating plants of the same technology nationally. It ranks #1 of 223 in TX.

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BatteriesERCOT · Fannin County

Platinum Storage

ENGIE North America · Fannin County · ERCOT

Platinum Storage is a battery energy storage facility with 348 MW of EIA-reported nameplate capacity and 380 MWh of reported energy capacity in Fannin County, Texas, registered as EIA Plant ID 69044. Platinum Energy Storage LLC owns and operates the plant. SC4000UD-MV-US equipment; public project records list 87 PCS units. Commercial operation began in February 2026. Its grid role is grid-connected battery energy storage resource.

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Asset analyst

plant:plant-69044

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

Overview

Key fields

Power / energy: 348 MW / 380 MWh
Reported plant capacity and configuration.
Technology: Batteries
Primary generation technology.
Registry anchor: Plant 69044
Platinum Energy Storage LLC · Fannin County · ERCOT
Storage duration: 1.3 hours
Battery subsystem rating.
Operating status: Operating
Platinum Storage is operating.
Grid connection: Valley South Switching Station
345 kV · Oncor Electric Delivery Company LLC
Equipment: 87 PCS units
Installed equipment documented in public project records.
Commercial operation: February 2026
Best-supported operating milestone.

Profile

Grid role: Grid-connected battery energy storage resource
Grid connection: Valley South Switching Station · 345 kV · Oncor Electric Delivery Company LLC.
Context: Power Alliance reported Platinum Energy Storage as the seventh-largest operating battery-storage facility in the United States in its Q2 2025 comparison.
Physical build: Platinum Storage is a battery energy storage system in Fannin County, Texas, interconnected at Oncor's Valley South Switching Station. The filed interconnection details specify 87 BESS inverters rated at 4 MVA each, for 348 MVA gross capacity, with net plant output of +309.53/-297.706 MW at the 34.5-kV bus and +311.512/-297.706 MW at the generator terminals.

Structured profile

Reported capacity: 348 MW
Batteries
Energy: 380 MWh
1.3-hour storage duration
Commercial operation: February 2026
Operating status: operating
Platinum Storage is operating.
Interconnection

Units and generators

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

Generator	Capacity	Technology	Operation	Status
PLAT	348 MW 300 MW summer	Batteries Electricity used for energy storage · BA	Feb 2026	Operating

Performance

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

Peer context

Technology capacity: 348 MW
National rank: #8
TX rank: #1

Monthly generation

Download CSV

Latest 12 months

40.3 GWh

Reported gross generation

Latest report

Apr 2026

EIA-923 monthly filing

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.

Interconnection record

ERCOT GIS Report

Queue project

Platinum Storage

high match · 98/100 · project name, county, capacity

Queue ID / status

22INR0554 · Completed

Point of interconnection

1729 Valley South 345kV

Interconnecting entity

Platinum Energy Storage LLC

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

Coordinate Parcel Area

2025

87.718 Acres

TxGIO parcel intersecting the mapped EIA plant coordinate; parcel 85219; FANNIN APPRAISAL DISTRICT; tax year 2025

TxGIO land parcel 85219

Coordinate Parcel Id

2025

85219

TxGIO parcel intersecting the mapped EIA plant coordinate; parcel 85219; FANNIN APPRAISAL DISTRICT; tax year 2025

TxGIO land parcel 85219

Coordinate Parcel Market Value

2025

736580

TxGIO parcel intersecting the mapped EIA plant coordinate; parcel 85219; FANNIN APPRAISAL DISTRICT; tax year 2025

TxGIO land parcel 85219

Coordinate Parcel Owner

2025

BLOCK WILLIAM DALE

TxGIO parcel intersecting the mapped EIA plant coordinate; parcel 85219; FANNIN APPRAISAL DISTRICT; tax year 2025

TxGIO land parcel 85219

Environmental Permit Status

Sep 18, 2025

ENGIE stated September 2025 that facility obtained all applicable federal and state permits

ENGIE public statement confirmed permitting completion.

Fannin County battery facility sparks a lawsuit | Texas Headline | kten.com

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 / operatorFinancierMarket / regulator

Timeline and sources

Project milestones and public references behind the asset profile.

Project timeline

Jul 2021
Jul 2021
Predecessor project company establishedEngie seeks...
Belltown Power incorporated BT Block Storage LLC as the business subsidiary used for the Fannin County project.
Oct 27, 2022

Platinum Storage

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Platinum Storage

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Overview

Key fields

Profile

Structured profile

Units and generators

Performance

Peer context

Monthly generation

Grid and market context

Interconnection record

Commercial, land, and environmental record

Land and environmental record

Related parties and identifiers

Relationship graph

Timeline and sources

Project timeline

Nearby substations

Parties and identifiers

Reporting portfolio

Sources

Common questions about Platinum Storage

How big is Platinum Storage?

What kind of plant is Platinum Storage?

Where is Platinum Storage located?

Who operates Platinum Storage?

How much electricity does Platinum Storage generate?

Where does Platinum Storage connect to the grid?

How does Platinum Storage compare to other plants?

Co-located assets

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