Eval Storage
255 MW storage in Cameron, TX · In queue since October 2020 · Proposed COD December 2028
255 MW
Capacity
1
Components
Battery
5y 7m
In Queue
IA Executed
IA Status
Signed Feb 2022
Queue → IA
1y 4m
IA → COD
6y 10m
Total Duration
1y 4m
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: 2028-12-31
Eval Storage is a proposed 255 MW battery storage project located in Cameron County, Texas. The project, developed by Hecate Grid East Valley Storage LLC, is currently active in the ERCOT interconnection queue as entry ERCOT-22INR0401, with a queue entry date of October 23, 2020. The proposed commercial operation date is December 31, 2028.
The project's Interconnection Agreement (IA) has been executed as of February 3, 2022. The point of interconnection is the 80229 Cavazos 138kV substation. Eval Storage has been the subject of recent news coverage, with seven articles categorized as industry news and deal announcements.
Generated from interconnection queue and public data sources
State
TX
County
Cameron
Grid Region
ERCOT (Texas)
Market
ISO/RTO Member
Developer
Hecate Grid East Valley Storage LLC
Utility
—
Entity
ERCOT
Service Type
—
Point of Interconnection
80229 Cavazos 138kV
Data Source
LBNL + Live
- ISO / RTO
- ERCOT
- Trading Hub
- HB_SOUTH
- Hub Confidence
- MEDIUM
- POI Substation
- Villa Cavazos Substation
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.
