PHOTON BESS1 SLF
152.74 MW storage in Wharton, TX · In queue since June 2022 · Proposed COD February 2025
152.74 MW
Capacity
1
Components
Battery
3y 11m
In Queue
IA Executed
IA Status
Signed Mar 2023
Queue → IA
9 months
IA → COD
1y 11m
Total Duration
9 months
Schedule
15 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: 2025-02-15
The PHOTON BESS1 SLF project is a proposed 152.74 MW battery storage project located in Wharton County, Texas. The project, developed by GulfStar Power, LLC, consists entirely of battery storage. It is currently active in the ERCOT interconnection queue as entry ERCOT-23INR0460, with a queue entry date of June 2, 2022, and a proposed commercial operation date of February 15, 2025.
The project has an executed Interconnection Agreement (IA), which was finalized on March 23, 2023. The point of interconnection (POI) is the 44880 Waterh_POI_5 345kV substation. The project has appeared in recent news coverage.
Generated from interconnection queue and public data sources
State
TX
County
Wharton
Grid Region
ERCOT (Texas)
Market
ISO/RTO Member
Developer
GulfStar Power, LLC
Utility
—
Entity
ERCOT
Service Type
—
Point of Interconnection
44880 Waterh_POI_5 345kV
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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