Callisto ID Energy Center
100 MW storage in Harris, TX · In queue since October 2024 · Proposed COD December 2026
100 MW
Capacity
1
Components
Battery
1y 7m
In Queue
Facility Study
IA Status
COD target: 2026
Total Duration
2y 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: 2026-12-01
The Callisto ID Energy Center is a proposed 100 MW battery storage project located in Harris County, Texas. Developed by Tempus Power Management LLC, the project is currently active in the ERCOT interconnection queue as entry ERCOT-26INR0590, with a queue entry date of October 1, 2024. The proposed commercial operation date is December 1, 2026.
The project's interconnection status is currently in the Facility Study phase. The Point of Interconnection (POI) is at the 47150 (H_O_C__B138) 138kV location. The Callisto ID Energy Center has appeared in recent news coverage regarding energy storage projects in Texas.
Generated from interconnection queue and public data sources
State
TX
County
Harris
Grid Region
ERCOT (Texas)
Market
ISO/RTO Member
Developer
Tempus Power management LLC
Utility
—
Entity
ERCOT
Service Type
—
Point of Interconnection
47150 (H_O_C__B138) 138kV
Data Source
LBNL + Live
- 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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