APS-Q299
150 MW storage in Maricopa, AZ · In queue since March 2019 · Proposed COD October 2023
150 MW
Capacity
1
Components
Battery
7y 4m
In Queue
IA Executed
IA Phase
COD target: 2023
Total Duration
4y 7m
Schedule
33 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
Realization risk from now to commercial operation — financing close, EPC and tax-equity counterparty mix, and COD probability vs the proposed date. The diligence view that determines whether the deal actually closes. Powered by InfraSure's development-stage modeling stack.
See the full development-risk decomposition for this project.
State
AZ
County
Maricopa
Grid Region
Mountain West
Market
—
Developer
—
Utility
Arizona Public Service
Entity
APS
Service Type
NRIS
Point of Interconnection
Westwing 69kV 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 probabilistic 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, DSCR projection, and financing-close risk — conditioned on commercial operation. First-year DSCR, 10-year cashflow, and counterparty exposure across price 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.
No Ask reports yet for this entity.
Ask about Project APS-Q299Forward forecasts, scenario decomposition, and risk-decision tooling for this queue project.
