# Longbow BESS, LLC

ERCOT asset profile · https://askthegrid.com/assets/facilities/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.

## 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.

## Metrics

- **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.

## Facts

- **Reported capacity:** 174 MW — Batteries · confidence: high
- **Commercial operation:** May 2025 · confidence: medium
- **Operating status:** operating — Longbow BESS, LLC is operating. · confidence: medium
- **Interconnection:** 100-DAB-B · confidence: medium
- **Location:** Brazoria County — ERCOT · confidence: high
- **Operator:** Longbow BESS, LLC · confidence: high
- **Asset role:** batteries — ERCOT · Brazoria County
- **Owner:** Tokyo Gas America (Tokyo Gas) · confidence: medium

## Related parties

- **Owner:** Tokyo Gas America — Owner for Longbow BESS, LLC ([source](https://tgamerica.com/))
- **EPC contractor:** DEPCOM Power — EPC contractor for Longbow BESS, LLC ([source](https://depcompower.com/))
- **Tax equity investor:** Foss & Company — Tax equity investor for Longbow BESS, LLC ([source](https://fossandco.com/))

## Sources

- [TitlePage](https://www.ercot.com/files/docs/2025/02/13/CapacityDemandandReservesReport_December2024_initial-version.xlsx) — ercot.com · regulatory — Feb 13, 2025 — LONGBOW BESS 25INR0328 LON_BES1 BA STORAGE OPER-SYN CONV BRAZORIA COASTAL
- [Capacity Demand and Reserves Report December 2024 initial version](https://ercot.com/files/docs/2025/02/13/CapacityDemandandReservesReport_December2024_initial-version.xlsx) — ercot.com · regulatory — Feb 13, 2025 — LONGBOW BESS 25INR0328 LON_BES1 BA STORAGE OPER-SYN CONV BRAZORIA COASTAL
- [News](https://www.tgamerica.com/news/) — tgamerica.com · other — Acquisition of a 174MW Battery Energy Storage System (BESS) Project December 22, 2023 … the acquisition of the 174MW Longbow BESS Project
- [Longbow Energy Storage](https://www.depcompower.com/projects/longbow-energy-storage) — depcompower.com · other — Located in the Texas Gulf Coast, the Longbow Energy Storage project. The project achieved substantial completion on February 16, 2025, BESS (Battery Energy
- [Ascend Analytics Selected by Tokyo Gas America for First...](https://www.ascendanalytics.com/blog/ascend-analytics-selected-by-tokyo-gas-america-for-first-ercot-storage-project) — ascendanalytics.com · other — Jun 25, 2025 — TGA's 174 MW Longbow battery energy storage system (BESS) project. providing clean, reliable and innovative energy solutions to the ERCOT- Jun 25, 2025 — TGA's 174 MW Longbow battery energy storage system (BESS) project. providing clean, reliable and innovative energy solutions to the ERCOT-
- [tgamerica.com](https://tgamerica.com/news) — tgamerica.com · other — Acquisition of a 174MW Battery Energy Storage System (BESS) the acquisition of the 174MW Longbow BESS Project
- [Longbow Energy Storage](https://depcompower.com/projects/longbow-energy-storage) — depcompower.com · other — DEPCOM delivered integrated EPC and LTSA services through a collaborative partnership with Tokyo Gas America
- [Ascend Analytics Selected By Tokyo Gas America For First Ercot Storage Project](https://ascendanalytics.com/blog/ascend-analytics-selected-by-tokyo-gas-america-for-first-ercot-storage-project) — ascendanalytics.com · other — Jun 25, 2025 — TGA's 174 MW Longbow battery energy storage system (BESS) project. providing clean, reliable and innovative energy solutions to the ERCOT- Jun 25, 2025 — TGA's 174 MW Longbow battery energy storage system (BESS) project. providing clean, reliable and innovative energy solutions to the ERCOT-

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Canonical page: https://askthegrid.com/assets/facilities/longbow-bess-llc
Website: [Tokyo Gas America](https://tgamerica.com/)
Profile published: 2026-07-17T03:34:30.747Z
Source: Ask the Grid — https://askthegrid.com/