How big is Cartwheel 1 - Storage, LLC?

Cartwheel 1 - Storage, LLC has a reported capacity of 300 MW. Source: EIA Form 860M.

What kind of plant is Cartwheel 1 - Storage, LLC?

Cartwheel 1 - Storage, LLC is a batteries facility in Hopkins County, TX, participating in the ERCOT market.

Where is Cartwheel 1 - Storage, LLC located?

Cartwheel 1 - Storage, LLC is in Hopkins County, TX, inside the ERCOT balancing area.

Who operates Cartwheel 1 - Storage, LLC?

Cartwheel 1 - Storage, LLC is operated by RWE Clean Energy according to the EIA generator inventory. Reporting membership does not by itself establish ultimate ownership.

How much electricity does Cartwheel 1 - Storage, LLC generate?

Cartwheel 1 - Storage, LLC reported 21.3 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.

How does Cartwheel 1 - Storage, LLC compare to other plants?

By capacity, Cartwheel 1 - Storage, LLC ranks #11 of 962 operating plants of the same technology nationally. It ranks #3 of 223 in TX.

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Cartwheel 1 - Storage, LLC

Cartwheel BESS, LLC - Hopkins County - ERCOT

Cartwheel 1 - Storage, LLC is a 150 MW / 300 MWh battery energy storage system (BESS) located in Sulphur Springs, Hopkins County, Texas. The facility is owned and operated by Cartwheel BESS, LLC, a wholly owned subsidiary within the RWE group. It is interconnected with Oncor Electric Delivery Company's transmission system at Tap 345kV 1697 Sulphur Springs Switch–2464 Cash Switch and operates in the ERCOT market as a wholesale generation resource. The facility was commissioned in late 2025 and provides energy storage capacity to support grid stability and resilience in the ERCOT region.

Open in grid

Battery enclosures under construction at RWE's Cartwheel project.

Source: RWE

Cartwheel 1 - Storage, LLC

ERCOT · Asset profile

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Cartwheel 1 - Storage, LLC — 300 MW battery storage, TX · Ask the Grid

Overview

Nameplate capacity: 300 MW
Canonical EIA plant baseline.
Registry anchor: Plant 68513
plant-68513

Structured profile

Technology: Batteries
Operator: Cartwheel BESS, LLC

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Units and generators

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

Generator	Capacity	Technology	Operation	Status
CWHBA	300 MW 300 MW summer	Batteries Electricity used for energy storage · BA	Dec 2025	Operating

Performance

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

Peer context

Technology capacity: 300 MW
National rank: #11
TX rank: #3

Monthly generation

Download CSV

Latest 12 months

21.3 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.

Nearby substations

HIFLD infrastructure inventory

SULPHUR SPRINGS SWITCHING

IN SERVICE · 345 kV

0.6 km

UNKNOWN307521

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

Construction Contract Award

Aug 15, 2024

Sendero Energy Services announced its award of civil site work including site preparation, grading, fill, access roads, drainage, and environmental protection for the Cartwheel BESS, substation, and switchyard.

Sendero Energy Services · RWE · RES

senderoenergyservices.com

Construction Commenced

Oct 2, 2024

RWE announced that onsite construction was underway at Cartwheel 1, with completion and commissioning planned for 2025; the project was described as 150 MW / 300 MWh.

RWE Clean Energy · RES

americas.rwe.com

Regulatory Filing

May 20, 2025

Cartwheel BESS, LLC filed a notice of self-certification as an exempt wholesale generator with FERC (Docket EG25-000, Accession 20250520-5155). The filing stated that Cartwheel BESS would own and operate an approximately 150 MW / 300 MWh facility in Sulphur Springs, with commercial operation estimated for late 2025.

Cartwheel BESS, LLC · FERC

interchange.puc.texas.gov

Commercial Operation

Dec 2025

Cartwheel BESS entered commercial operation. RWE's March 2026 project review identified Cartwheel as a recently completed 150 MW / 300 MWh BESS project commissioned during 2025.

RWE Clean Energy · Cartwheel BESS, LLC

rwe.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

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

AssetOwner / operatorContractorOrganizationMarket / regulator

Timeline and sources

Project milestones and public references behind the asset profile.

Project timeline

Aug 15, 2024
Aug 15, 2024
Civil-Construction Awardsenderoener...
Sendero Energy Services announced its award of civil site work including site preparation, grading, fill, access roads, drainage, and environmental protection for the Cartwheel BESS, substation, and switchyard.
Oct 2, 2024

Reporting portfolio

EIA reporting entity

RWE Clean Energy

Entity 67192

Operating portfolio

151 plants

25 states

Reported capacity

12,717.5 MW

Batteries · Onshore Wind Turbine · Solar Photovoltaic

Largest reported plants in this portfolio
Largest reported plants	Capacity	State
Bright Arrow Solar, LLC	403.6 MW	TX
Cartwheel 1 - Storage, LLCCurrent	300 MW	TX
Peregrine Solar	300 MW	TX
Fifth Standard Solar PV, LLC (Hybrid)	287 MW	CA
Radfords Run Wind Farm	278 MW	IL
Emily Solar, LLC	273.6 MW	IL
Copper Mountain Solar 3	255 MW	NV
Copper Mountain Solar 5, LLC	252 MW	NV

Portfolio membership follows the latest EIA-860 reporting entity. It does not imply ultimate ownership.

View full reporting portfolio

Cartwheel 1 - Storage, LLC

Ask about Cartwheel 1 - Storage, LLC

Cartwheel 1 - Storage, LLC

Ask about Cartwheel 1 - Storage, LLC

Overview

Structured profile

Related assets

Tanzanite Storage

Platinum Storage

Units and generators

Performance

Peer context

Monthly generation

Grid and market context

Nearby substations

Commercial, land, and environmental record

Transactions and agreements

Related parties and identifiers

Relationship graph

Timeline and sources

Project timeline

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Parties and identifiers

Reporting portfolio

Sources

Common questions about Cartwheel 1 - Storage, LLC

How big is Cartwheel 1 - Storage, LLC?

What kind of plant is Cartwheel 1 - Storage, LLC?

Where is Cartwheel 1 - Storage, LLC located?

Who operates Cartwheel 1 - Storage, LLC?

How much electricity does Cartwheel 1 - Storage, LLC generate?

How does Cartwheel 1 - Storage, LLC compare to other plants?

Co-located assets