Callaway Storage
9.99 MW storage in Nueces, TX · In queue since April 2024 · Proposed COD July 2025
9.99 MW
Capacity
1
Components
Battery
2y 1m
In Queue
In Progress (unknown study)
IA Status
Signed Mar 2024
IA → COD
1y 4m
Total Duration
2y 1m
Schedule
10 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: 2025-07-15
The Callaway Storage project is a proposed 9.99 MW battery energy storage system located in Nueces County, Texas. Developed by Aggreko MSR Grid PC2, the project entered the ERCOT interconnection queue as entry ERCOT-25INR0647 on April 3, 2024. Its proposed commercial operation date is July 15, 2025.
The project's interconnection agreement is currently listed as "In Progress (unknown study)" with an agreement date of March 17, 2024. The project is currently listed as "active" in the interconnection queue. The Callaway Storage project has appeared in recent news coverage regarding energy storage developments in Texas.
Generated from interconnection queue and public data sources
State
TX
County
Nueces
Grid Region
ERCOT (Texas)
Market
ISO/RTO Member
Developer
Aggreko MSR Grid PC2
Utility
—
Entity
ERCOT
Service Type
—
Data Source
LBNL
- 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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