Castor BESS
205.39 MW storage in Brazoria, TX · In queue since October 2021 · Proposed COD May 2026
205.39 MW
Capacity
1
Components
Battery
4y 7m
In Queue
IA Executed
IA Status
Signed Feb 2023
Queue → IA
1y 4m
IA → COD
3y 3m
Total Duration
1y 4m
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: 2026-05-22
Castor BESS is a proposed 205.39 MW battery storage project located in Brazoria County, Texas. The developer is BRP Castor BESS LLC. The project is interconnected within the Electric Reliability Council of Texas (ERCOT) queue as entry ERCOT-23INR0358, with an original queue entry date of October 4, 2021, and a proposed commercial operation date of May 22, 2026. The point of interconnection is the 138 kV West Columbia Local Substation (#39530).
The project's Interconnection Agreement (IA) has been executed as of February 15, 2023. The project is linked to the existing Castor operating plant (EIA plant ID 65870). The project has appeared in recent news coverage.
Generated from interconnection queue and public data sources
State
TX
County
Brazoria
Grid Region
ERCOT (Texas)
Market
ISO/RTO Member
Developer
BRP Castor BESS LLC
Utility
—
Entity
ERCOT
Service Type
—
Point of Interconnection
138 kV West Columbia Local Substation (#39530)
Data Source
LBNL + Live
- ISO / RTO
- ERCOT
- Trading Hub
- HB_HOUSTON
- Hub Confidence
- HIGH
- Nearest Node (Estimated)
- CAST_ESS_RN
- POI Substation
- West Columbia Local 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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