Firefly Power
401.18 MW storage in Tarrant, TX · In queue since February 2024 · Proposed COD April 2027
401.18 MW
Capacity
1
Components
Battery
2y 3m
In Queue
Facility Study
IA Status
COD target: 2027
Total Duration
3y 2m
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: 2027-04-15
Firefly Power is a proposed 401.18 MW battery storage project located in Tarrant County, Texas. The project, developed by Firefly Power LLC, is currently in the ERCOT interconnection queue as entry ERCOT-26INR0293, with a queue entry date of February 27, 2024. The proposed commercial operation date is April 15, 2027, and the project's interconnection status is currently in the Facility Study phase.
The proposed project consists entirely of battery storage with a total capacity of 401.18 MW. The point of interconnection is the 1880 Rocky Creek 345kV. The project has been mentioned in recent news coverage related to the energy industry.
Generated from interconnection queue and public data sources
State
TX
County
Tarrant
Grid Region
ERCOT (Texas)
Market
ISO/RTO Member
Developer
Firefly Power LLC
Utility
—
Entity
ERCOT
Service Type
—
Point of Interconnection
1880 Rocky Creek 345kV
Data Source
LBNL
- ISO / RTO
- ERCOT
- Trading Hub
- HB_NORTH
- Hub Confidence
- MEDIUM
- POI Substation
- Rocky Creek 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 2026-03-14
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