Seven Flags BESS
102.7 MW storage in Webb, TX · In queue since September 2021 · Proposed COD December 2025
102.7 MW
Capacity
1
Components
Battery
4y 8m
In Queue
IA Executed
IA Status
Signed May 2023
Queue → IA
1y 8m
IA → COD
2y 7m
Total Duration
1y 8m
Schedule
5 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: 2025-12-15
Seven Flags BESS is a proposed 102.7 MW battery storage project located in Webb County, Texas. The project, developed by Seven Flags BESS LLC, is interconnected within the ERCOT region under queue ID ERCOT-23INR0351. It entered the queue on September 1, 2021, with a proposed commercial operation date of December 15, 2025. The interconnection agreement was executed on May 19, 2023.
The development project is linked to the existing operating plant Seven Flags BESS LLC (EIA plant ID 66689). The project has been featured in recent news coverage.
Generated from interconnection queue and public data sources
State
TX
County
Webb
Grid Region
ERCOT (Texas)
Market
ISO/RTO Member
Developer
Seven Flags BESS LLC
Utility
—
Entity
ERCOT
Service Type
—
Point of Interconnection
8295 Wormser Substation 138kV
Data Source
LBNL
- ISO / RTO
- ERCOT
- Trading Hub
- HB_SOUTH
- Hub Confidence
- HIGH
- POI Substation
- Wormser Road 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.
Last updated 2026-03-26
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