PSE-148
100 MW storage in King, WA · In queue since April 2024 · Proposed COD October 2028
100 MW
Capacity
1
Components
Battery
2y 1m
In Queue
Cluster Study
IA Status
COD target: 2028
Total Duration
4y 6m
Interconnection request submitted to ISO/RTO
Project undergoes interconnection studies to assess grid impact.
Typical: 18–36 months
Interconnection agreement not yet executed
Typical: 30–60 days (negotiation)
Proposed COD: 2028-10-31
PSE-148 is a proposed 100 MW battery storage project located in King County, Washington. The project is being developed by Puget Sound Energy (PSE) and is interconnected to the Puget Sound Energy system. It entered the PSE interconnection queue on April 17, 2024, with a proposed commercial operation date of October 31, 2028.
The project's interconnection status is currently in the Cluster Study phase. The point of interconnection is the Sedro-Woolley 230 kV Substation. The project has appeared in recent news coverage regarding PSE's grid modernization efforts.
Generated from interconnection queue and public data sources
State
WA
County
King
Grid Region
Mountain West
Market
—
Developer
—
Utility
Puget Sound Energy
Entity
PSE
Service Type
—
Point of Interconnection
Sedro-Woolley 230 kV Substation
Data Source
LBNL
- ISO / RTO
- MOUNTAIN_WEST
- Trading Hub
- MID-C
- Hub Confidence
- UNKNOWN
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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