Duffy BESS
ERCOT-26INR0250BetaActiveBatteryERCOTLBNL + Live
235.9 MW storage in Matagorda, TX · In queue since August 2023 · Proposed COD December 2026
235.9 MW
Capacity
1
Components
Battery
2y 8m
In Queue
Facility Study
IA Status
COD target: 2026
Interconnection Timeline
Total Duration
3y 4m
Facilities Study50%
Queue EntryAug 21, 2023
Interconnection request submitted to ISO/RTO
Interconnection StudyCurrent
ERCOT uses a serial "connect and manage" approach — fastest among major ISOs.
Typical: 18–30 months (fastest major ISO)
Interconnection Agreement
Interconnection agreement not yet executed
Typical: 30–60 days (negotiation)
Commercial Operation
Proposed COD: 2026-12-31
Project Details
State
TX
County
Matagorda
Region
ERCOT
Developer
Duffy Energy Storage LLC
Utility
—
Entity
ERCOT
Service Type
—
Point of Interconnection
Tap 345kV WAP to STP CKT39 (PTI# 5915-44000 CKT 39)
Data Source
LBNL + Live
No news available for this project.