APS-Q271
75 MW storage in Navajo, AZ · In queue since March 2018 · Proposed COD December 2021
75 MW
Capacity
1
Components
Battery
8y 4m
In Queue
Construction
IA Phase
COD target: 2021
Total Duration
3y 9m
Schedule
55 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: 2021-12-23
APS-Q271 is a proposed 75 MW battery storage project located in Navajo County, Arizona. The project, under development by Arizona Public Service (APS), consists of a single 75 MW battery component. It is interconnected to the Arizona Public Service system at the Cholla 500kV Substation.
The project entered the Arizona Public Service interconnection queue on March 29, 2018, with a proposed commercial operation date of December 23, 2021. The interconnection agreement for the project has been executed.
Generated from interconnection queue and public data sources
Realization risk through commissioning — schedule slippage, construction cost overrun, and COD probability vs the stated window. The diligence view that determines whether the project comes online when promised. Powered by InfraSure's development-stage modeling stack.
See the full development-risk decomposition for this project.
State
AZ
County
Navajo
Grid Region
Mountain West
Market
—
Developer
—
Utility
Arizona Public Service
Entity
APS
Service Type
NRIS
Point of Interconnection
Cholla 500kV Substation
Data Source
LBNL
Composite operating-phase risk view — what this asset's risk profile will look like once it commissions. Climate hazards across its operating life, expected generation variability, and offtake counterparty exposure, decomposed into a single decision-grade score. Powered by InfraRisk.
See the full risk decomposition + scenarios for this project.
Forward generation outlook — first-year production estimate and 10-year P50 trajectory, with curtailment risk decomposed by congestion zone and ranges (P10/P50/P90) across weather, demand, and policy scenarios. Powered by InfraSure's generation modeling stack.
See the full forecast + scenario decomposition for this project.
Forward revenue, first-year DSCR, and construction cost overrun exposure — what determines whether the deal clears its covenants once online. Projected across price, demand, and policy scenarios. Powered by InfraSure's asset cashflow stack.
See the full revenue + DSCR projection for this project.
- 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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Ask about Project APS-Q271Forward forecasts, scenario decomposition, and risk-decision tooling for this queue project.
