Great Hambino BESS
122.98 MW hybrid in Atascosa, TX · In queue since September 2025 · Proposed COD October 2027
122.98 MW
Capacity
0
Components
8 months
In Queue
—
IA Status
COD target: 2027
Total Duration
2y 1m
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 not yet executed
Typical: 30–60 days (negotiation)
Proposed COD: 2027-10-01
The Great Hambino BESS is a proposed 122.98 MW hybrid battery energy storage project in Atascosa County, Texas. Developed by Atascosa BESS, LLC, the project consists of battery storage and other unspecified technologies. It is currently active in the ERCOT interconnection queue as entry ERCOT-26INR0654, with a queue entry date of September 11, 2025, and a proposed commercial operation date of October 1, 2027.
The project intends to interconnect at the #5700 Miracle Lake Substation 138kV.
Generated from interconnection queue and public data sources
State
TX
County
Atascosa
Grid Region
ERCOT (Texas)
Market
ISO/RTO Member
Developer
Atascosa BESS, LLC
Utility
—
Entity
ERCOT
Service Type
—
Point of Interconnection
#5700 Miracle Lake Substation 138kV
Data Source
Live · ERCOT
- 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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