MISO-S1127
170 MW storage in Washington, MS · In queue since November 2025
170 MW
Capacity
0
Components
6 months
In Queue
—
IA Status
Total Duration
6 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-S1127 is a proposed 170 MW battery storage project located in Washington County, Mississippi. The project is interconnected within the Midcontinent Independent System Operator (MISO) queue, having entered the queue on November 10, 2025. The interconnecting utility is Entergy Mississippi, LLC.
The project's point of interconnection (POI) is the Gerald Andrus SES SWYD - Tinnin Road 230.0kV. The project is currently in the System Impact Study (SIS) phase of the interconnection process.
Generated from interconnection queue and public data sources
State
MS
County
Washington
Grid Region
MISO (Midcontinent)
Market
ISO/RTO Member
Developer
—
Utility
ENTERGY MISSISSIPPI, LLC.
Entity
MISO
Service Type
SIS
Point of Interconnection
GERALD ANDRUS SES SWYD - TINNIN ROAD 230.0kV
Data Source
Live · MISO
- ISO / RTO
- MISO
- Trading Hub
- LOUISIANA.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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