First Capitol BESS
256.2 MW storage in Brazoria, TX · In queue since October 2023 · Proposed COD May 2027
256.2 MW
Capacity
1
Components
Battery
2y 7m
In Queue
IA Executed
IA Status
Signed Jun 2024
Queue → IA
8 months
IA → COD
2y 11m
Total Duration
8 months
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: 2027-05-01
First Capitol BESS is a proposed 256.2 MW battery storage project located in Brazoria County, Texas. The project, developed by First Capitol BESS, LLC, is interconnected within the ERCOT region and entered the ERCOT interconnection queue as project number ERCOT-26INR0226 on October 4, 2023. The current proposed commercial operation date is May 1, 2027.
The project's Interconnection Agreement (IA) has been executed as of June 10, 2024. The point of interconnection is Tap 138kV West Columbia Main (39500) - Sweeny Cogen (110505).
Generated from interconnection queue and public data sources
State
TX
County
Brazoria
Grid Region
ERCOT (Texas)
Market
ISO/RTO Member
Developer
First Capitol BESS, LLC
Utility
—
Entity
ERCOT
Service Type
—
Point of Interconnection
Tap 138kV West Columbia Main (39500) - Sweeny Cogen (110505)
Data Source
LBNL + Live
- ISO / RTO
- ERCOT
- Trading Hub
- HB_HOUSTON
- Hub Confidence
- MEDIUM
- Nearest Node (Estimated)
- NCO_RN
- POI Substation
- West Columbia Main Substation
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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