Bufflehead BESS
159.23 MW storage in Collin, TX · In queue since March 2022 · Proposed COD February 2027
159.23 MW
Capacity
1
Components
Battery
4y 2m
In Queue
IA Executed
IA Status
Signed Apr 2024
Queue → IA
2y 1m
IA → COD
2y 10m
Total Duration
2y 1m
Interconnection request submitted to ISO/RTO
ERCOT uses a serial "connect and manage" approach — fastest among major ISOs.
Typical: 18–30 months (fastest major ISO)
Interconnection agreement executed — binding commitment to build
Typical: 30–60 days (negotiation)
Project under construction
Typical: 6–18 months
Proposed COD: 2027-02-15
Bufflehead BESS is a proposed 159.23 MW battery storage project in Collin County, Texas. Developed by Boxcar Energy Storage, LLC, the project is located within the ERCOT region and consists entirely of battery storage. It entered the ERCOT interconnection queue as queue ID ERCOT-24INR0274 on March 7, 2022, with a proposed commercial operation date of February 15, 2027.
The project's Interconnection Agreement (IA) was executed on April 10, 2024. The point of interconnection is the 2475 Lavon Switch 138kV. The Bufflehead BESS project has been the subject of recent news coverage.
Generated from interconnection queue and public data sources
State
TX
County
Collin
Grid Region
ERCOT (Texas)
Market
ISO/RTO Member
Developer
Boxcar Energy Storage, LLC
Utility
—
Entity
ERCOT
Service Type
—
Point of Interconnection
2475 Lavon Switch 138kV
Data Source
LBNL + Live
- ISO / RTO
- ERCOT
- Trading Hub
- HB_NORTH
- Hub Confidence
- LOW
This project's market context is estimated from its Point of Interconnection. Hub and node assignments are approximate and based on geographic inference from the POI substation name.
Last updated 2026-03-14
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