MISO-S1125
400 MW storage in St. Francis, AR · In queue since October 2025
400 MW
Capacity
0
Components
7 months
In Queue
—
IA Status
Total Duration
7 months
Interconnection request submitted to ISO/RTO
MISO uses the Definitive Planning Phase (DPP) process with 3 study phases.
Typical: 30–40 months (historical); 12 months target
Interconnection agreement not yet executed
Typical: 30–60 days (negotiation)
Commercial operation date not yet determined
MISO-S1125 is a proposed 400 MW battery storage project located in St. Francis County, Arkansas. The project is in the Midcontinent Independent System Operator (MISO) interconnection queue, having entered the queue on October 20, 2025. Entergy Arkansas, LLC is the utility associated with the project. The designated point of interconnection (POI) is the WEST MEMPHIS EHV - KEO EHV 500.0kV substation. The project's service type is System Impact Study (SIS).
The project is currently listed as active within the MISO queue.
Generated from interconnection queue and public data sources
State
AR
County
St. Francis
Grid Region
MISO (Midcontinent)
Market
ISO/RTO Member
Developer
—
Utility
ENTERGY ARKANSAS, LLC
Entity
MISO
Service Type
SIS
Point of Interconnection
WEST MEMPHIS EHV - KEO EHV 500.0kV
Data Source
Live · MISO
- ISO / RTO
- MISO
- Trading Hub
- ARKANSAS.HUB
- Hub Confidence
- MEDIUM
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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