Twin Groves Storage II
50 MW storage in Mclean, IL · In queue since March 2020 · Proposed COD January 2028
50 MW
Capacity
1
Components
Battery
6y 2m
In Queue
IA Executed
IA Status
COD target: 2028
Total Duration
7y 10m
Interconnection request submitted to ISO/RTO
PJM processes interconnection requests through multi-phase System Impact Studies (SIS).
Typical: ~48 months (historically longest)
Interconnection agreement executed — binding commitment to build
Typical: 30–60 days (negotiation)
Project under construction
Typical: 6–18 months
Proposed COD: 2028-01-28
The Twin Groves Storage II project is a proposed 50 MW battery storage project located in McLean County, Illinois. The project is interconnected within the PJM Interconnection queue as entry PJM-AF2-352. The queue entry date is March 31, 2020, and the proposed commercial operation date is January 28, 2028. The project's interconnection agreement has been executed.
The Twin Groves Storage II project is being developed within the ComEd utility territory. The project consists of 50 MW of battery storage capacity. The project is currently listed as active within the PJM interconnection queue.
Generated from interconnection queue and public data sources
State
IL
County
Mclean
Grid Region
PJM Interconnection
Market
ISO/RTO Member
Developer
—
Utility
ComEd
Entity
PJM
Service Type
—
Point of Interconnection
Blue Mound 345 kV
Data Source
LBNL + Live
- ISO / RTO
- PJM
- Trading Hub
- N ILLINOIS HUB
- Hub Confidence
- HIGH
- Nearest Node (Estimated)
- 989 TWIN34.5 KV HTRAILWF
- POI Substation
- Blue Mound 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.
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