Longbow BESS, LLC
TG Longbow Holdings, LLC · Brazoria County · ERCOT
Longbow BESS, LLC is an EIA-listed batteries facility with 174.0 MW in Brazoria County, Texas, registered as EIA Plant ID 67083. Tokyo Gas America acquired the project from Clean Capital Partners; Longbow BESS, LLC is the registered plant entity. DEPCOM Power provided EPC and LTSA services. The project reached substantial completion in February 2025 and was expected to begin commercial operation in 2024.
Overview
Key fields
- Reported capacity
- 174 MW
EIA-reported operating capacity; nameplate, seasonal, AC/DC, and unit ratings may differ.
- Technology
- Batteries
Primary generation technology.
- Registry anchor
- Plant 67083
Longbow BESS, LLC · Brazoria County · ERCOT
- Operating status
- Operating
Longbow BESS, LLC is operating.
- Grid connection
- 100-DAB-B
Source-backed interconnection context.
- Commercial operation
- 2024
Best-supported operating milestone.
Profile
- Grid connection
- 100-DAB-B.
- Context
- Longbow BESS is a 174 MW battery energy storage facility in Brazoria County, Texas that was acquired by Tokyo Gas America as a completed merchant BESS project; the acquisition and project financing announcements in late 2023–early 2024 mark one of Tokyo Gas’s first large US BESS asset acquisitions.
- Physical build
- Utility-scale battery energy storage project (Longbow BESS / Longbow Energy Storage) in Brazoria County, Texas — 174 MW nameplate (EIA) with ~350 MWh of installed energy reported by the EPC. DEPCOM (EPC) states deployment of CATL batteries, Ingeteam INGECON® SUN STORAGE 3930TL (ISS-3930TL-HV-C650) inverters, and Fractal EMS; DEPCOM delivered integrated EPC and LTSA services and reported substantial completion in February 2025.
Structured profile
- Reported capacity
- 174 MW
Batteries
- Commercial operation
- May 2025
- Operating status
- operating
Longbow BESS, LLC is operating.
- Interconnection
- 100-DAB-B
- Location
- Brazoria County
ERCOT
- Operator
- Longbow BESS, LLC
- Asset role
- batteries
ERCOT · Brazoria County
- Owner
- Tokyo Gas America (Tokyo Gas)
Units and generators
Operating generator records and technology attributes reported through EIA-860.
| Generator | Capacity | Technology | Operation | Status |
|---|---|---|---|---|
| LBBES | 174 MW 174 MW summer | Batteries Electricity used for energy storage · BA | Oct 2024 | Operating |
Performance
Monthly EIA generation history and recent market-resource behavior where linked telemetry is available.
Peer context
- Technology capacity
- 174 MW
- National rank
- #77
- TX rank
- #30
Monthly generation
Download CSVEIA-923 reports gross generation and net grid exchange for storage plants. Gross generation is shown as a discharge proxy; it is not a cycle count or conventional capacity factor.
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 ReportMatched to the latest available ERCOT generation-interconnection queue record. Queue status and completion dates describe the queue record; operating status is verified separately against plant and market registrations.
Nearby substations
HIFLD infrastructure inventoryCommercial, land, and environmental record
Source-backed project transactions, agreements, land records, permits, and environmental disclosures. Portfolio and adjacent-project facts remain explicitly scoped.
Financing
Transactions and agreements
Land and environmental record
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.
Parties and identifiers
| Relationship | Entity | Basis |
|---|---|---|
| Owner | Owner for Longbow BESS, LLC | |
| EPC contractor | EPC contractor for Longbow BESS, LLC | |
| Tax equity investor | Tax equity investor for Longbow BESS, LLC | |
| Grid selection | plant:plant-67083 | Canonical asset page /ercot/assets/plant/longbow-bess-llc. |
Reporting portfolio
Portfolio membership follows the latest EIA-860 reporting entity. It does not imply ultimate ownership.
Timeline and sources
Project milestones and public references behind the asset profile.
Project timeline
- Commercial operation / commissioningMarathon Ca...
Registry and project sources list Longbow BESS as operational in 2024.
- Financial-Advisory AnnouncementMarathon Ca...
Marathon Capital announced its advisory role reporting Tokyo Gas Co., Ltd.'s 100% acquisition of the 174 MW / 348 MWh Longbow BESS.
- Tax-equity / financing partner announcedFoss & Comp...
Foss & Company announced a partnership with Tokyo Gas America and Clean Capital Partners on the Longbow BESS project and was presented as project tax-equity / financier.
- Generator enters operationEIA-860
EIA-860 lists generator LBBES with this operating date.
- Investment Tax Credit (ITC) reportingExplore our...
A sector report (February 2025) cites approximately $118.5 million of Investment Tax Credits associated with the Longbow BESS project.
Sources
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