Firefly Fields Storage
156.52 MW hybrid in Colorado, TX · In queue since March 2025 · Proposed COD September 2028
156.52 MW
Capacity
0
Components
1y 2m
In Queue
—
IA Status
COD target: 2028
Total Duration
3y 6m
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: 2028-09-30
Firefly Fields Storage is a proposed hybrid project located in Colorado County, Texas, with a total capacity of 156.52 MW. The project, developed by Firefly Fields Energy Center LLC, consists of battery energy storage. It is currently active in the ERCOT interconnection queue as entry ERCOT-29INR0123, with a queue entry date of March 24, 2025, and a proposed commercial operation date of September 30, 2028.
The point of interconnection for Firefly Fields Storage is Tap 138 kV 57640 Rock Island to 7258 Glidden.
Generated from interconnection queue and public data sources
State
TX
County
Colorado
Grid Region
ERCOT (Texas)
Market
ISO/RTO Member
Developer
Firefly Fields Energy Center LLC
Utility
—
Entity
ERCOT
Service Type
—
Point of Interconnection
Tap 138 kV 57640 Rock Island to 7258 Glidden
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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