Great Rock BESS
ERCOT-25INR0230BetaActiveBatteryERCOTLBNL + Live
300.9 MW storage in Leon, TX · In queue since November 2022 · Proposed COD December 2027
300.9 MW
Capacity
1
Components
Battery
3y 5m
In Queue
IA Executed
IA Status
Signed Aug 2024
Interconnection Timeline
Queue → IA
1y 9m
IA → COD
3y 4m
Total Duration
1y 9m
Construction75%
Queue EntryNov 7, 2022
Interconnection request submitted to ISO/RTO
Interconnection Study
ERCOT uses a serial "connect and manage" approach — fastest among major ISOs.
Typical: 18–30 months (fastest major ISO)
Interconnection AgreementAug 23, 2024
Interconnection agreement executed — binding commitment to build
Typical: 30–60 days (negotiation)
ConstructionCurrent
Project under construction
Typical: 6–18 months
Commercial Operation
Proposed COD: 2027-12-20
Project Details
State
TX
County
Leon
Region
ERCOT
Developer
Black Mountain Energy Storage II
Utility
—
Entity
ERCOT
Service Type
—
Point of Interconnection
Tap 345kV 46020 Limestone - 967 Gibbon Creek Ckt 18
Data Source
LBNL + Live
No news available for this project.