Fort Mason BESS
9.8 MW storage in Mason, TX · In queue since August 2023 · Proposed COD March 2025
9.8 MW
Capacity
1
Components
Battery
2y 9m
In Queue
IA Executed
IA Status
Signed Jan 2023
IA → COD
2y 2m
Total Duration
2y 9m
Schedule
14 months past proposed COD
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: 2025-03-04
The Fort Mason BESS is a proposed 9.8 MW battery storage project located in Mason County, Texas. The developer is Regis Mason LLC. This project is currently active in the ERCOT interconnection queue as entry ERCOT-23INR0500, with a queue entry date of August 18, 2023, and a proposed commercial operation date of March 4, 2025.
The project's Interconnection Agreement (IA) has been executed as of January 10, 2023. The Point of Interconnection (POI) is at the FORTMA station, utilizing a 138kV transmission line. Recent news coverage has discussed the project.
Generated from interconnection queue and public data sources
State
TX
County
Mason
Grid Region
ERCOT (Texas)
Market
ISO/RTO Member
Developer
Regis Mason LLC
Utility
—
Entity
ERCOT
Service Type
—
Point of Interconnection
Station Name (TDSP Station Code): FORTMA; Load/Load Transformer Name: T1-FM140; PTI BUS number: 76390; Voltage in kV (Transmission Level): 138kV Transformer: 3x 4000kVA 800VAC - 12.47kVA
Data Source
LBNL
- 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.
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