Tanzanite Storage
265.8 MW storage in Henderson, TX · In queue since September 2021 · Proposed COD May 2025
265.8 MW
Capacity
1
Components
Battery
4y 8m
In Queue
IA Executed
IA Status
Signed Jul 2022
Queue → IA
10 months
IA → COD
2y 10m
Total Duration
10 months
Schedule
12 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: 2025-05-08
Tanzanite Storage is a proposed 265.8 MW battery storage project located in Henderson County, Texas. The project, developed by Tanzanite Energy Storage LLC, is interconnected within the ERCOT region under queue ID ERCOT-22INR0549. It entered the queue on September 1, 2021, with a proposed commercial operation date of May 8, 2025. The project's Interconnection Agreement (IA) was executed on July 15, 2022.
The proposed project is linked to the existing operating Tanzanite Storage facility (EIA plant ID 69026). Recent news coverage indicates regulatory interest in the project.
Generated from interconnection queue and public data sources
State
TX
County
Henderson
Grid Region
ERCOT (Texas)
Market
ISO/RTO Member
Developer
Tanzanite Energy Storage LLC
Utility
—
Entity
ERCOT
Service Type
—
Point of Interconnection
6867 NORTH ATHENS 138kV
Data Source
LBNL
- ISO / RTO
- ERCOT
- Trading Hub
- HB_NORTH
- Hub Confidence
- HIGH
- Nearest Node (Estimated)
- TANZ_ESS_RN
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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