APS-Q299
150 MW storage in Maricopa, AZ · In queue since March 2019 · Proposed COD October 2023
150 MW
Capacity
1
Components
Battery
7y 2m
In Queue
IA Executed
IA Status
COD target: 2023
Total Duration
4y 7m
Schedule
31 months past proposed COD
Interconnection request submitted to ISO/RTO
Project undergoes interconnection studies to assess grid impact.
Typical: 18–36 months
Interconnection agreement executed — binding commitment to build
Typical: 30–60 days (negotiation)
Project under construction
Typical: 6–18 months
Proposed COD: 2023-10-31
APS-Q299 is a proposed 150 MW battery storage project located in Maricopa County, Arizona. The project is in the Arizona Public Service (APS) interconnection queue, with an initial queue entry date of March 29, 2019, and a proposed commercial operation date of October 31, 2023. The interconnection agreement for the project has been executed. The point of interconnection is the Westwing 69kV Substation.
The development project is sponsored by APS. Recent news coverage has discussed the project.
Generated from interconnection queue and public data sources
State
AZ
County
Maricopa
Grid Region
Mountain West
Market
—
Developer
—
Utility
Arizona Public Service
Entity
APS
Service Type
—
Point of Interconnection
Westwing 69kV Substation
Data Source
LBNL
- ISO / RTO
- MOUNTAIN_WEST
- Trading Hub
- PALOVERDE
- 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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