APS-Q427
250 MW storage in Maricopa, AZ · In queue since September 2021 · Proposed COD May 2025
250 MW
Capacity
1
Components
Battery
4y 8m
In Queue
Cluster Study
IA Status
COD target: 2025
Total Duration
3y 8m
Schedule
12 months past proposed COD
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: 2025-05-01
APS-Q427 is a proposed 250 MW battery storage project located in Maricopa County, Arizona. The project is being developed within the Arizona Public Service (APS) service area. It entered the APS interconnection queue on September 30, 2021, with a proposed commercial operation date of May 1, 2025. The point of interconnection is the Freedom 230KV Switchyard. Its interconnection status is currently in the Cluster Study phase.
The development project consists of 250 MW of battery storage capacity. It is listed in the APS interconnection queue. The project has appeared in recent news coverage regarding energy storage development in Arizona.
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
Freedom 230KV Switchyard
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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