Tierra Seca BESS
102.7 MW storage in Val Verde, TX · In queue since August 2021 · Proposed COD October 2025
102.7 MW
Capacity
1
Components
Battery
4y 9m
In Queue
IA Executed
IA Status
Signed May 2023
Queue → IA
1y 9m
IA → COD
2y 5m
Total Duration
1y 9m
Schedule
7 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: 2025-10-01
Tierra Seca BESS is a proposed 102.7 MW battery storage project in Val Verde County, Texas. Developed by Tierra Seca BESS LLC, the project entered the ERCOT interconnection queue as queue ID ERCOT-23INR0364 on August 24, 2021, with a proposed commercial operation date of October 1, 2025. The project has an Interconnection Agreement (IA) executed on May 18, 2023.
The proposed project is linked to the existing Tierra Seca operating plant (EIA plant ID 68748). Recent news coverage has discussed the development.
Generated from interconnection queue and public data sources
State
TX
County
Val Verde
Grid Region
ERCOT (Texas)
Market
ISO/RTO Member
Developer
Tierra Seca BESS LLC
Utility
—
Entity
ERCOT
Service Type
—
Point of Interconnection
138kV 8255 HAMILTON4A (Hamilton Road Substation)
Data Source
LBNL
- ISO / RTO
- ERCOT
- Trading Hub
- HB_SOUTH
- Hub Confidence
- MEDIUM
- Nearest Node (Estimated)
- HAMI_BESS_RN
- POI Substation
- Del Rio 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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