# Phoenix (APS): what a 50 MW connection costs under Arizona Public Service

URL: https://open-factory.com/power/phoenix-aps/
Data as of: 2026-08-21
Publisher: Open Factory, https://open-factory.com

**What does a 50 MW connection cost in Phoenix (APS)?** In Phoenix (APS), Arizona Public Service connects a 50 MW load under Extra High Load Factor (XHLF) rate update with minimum bill and collateral; long-term contracts with upfront contributions, docket ACC E-01345A-25-0105 (June 2025 rate case; pending). Minimum bill (level not public). Term: long-term contracts (length not public). Realistic energization: 2029. Open Factory's Large-Load Cost Table, as of August 21, 2026.

## Facts

- Market: Phoenix (APS), AZ (APS (non-RTO))
- Utility: Arizona Public Service
- Tariff or rule: Extra High Load Factor (XHLF) rate update with minimum bill and collateral; long-term contracts with upfront contributions
- Docket: ACC E-01345A-25-0105 (June 2025 rate case; pending)
- Status: pending
- Large-load threshold: not published (XHLF class)
- Study fee: not published
- Security or collateral: collateral requirements (formula not public); upfront contributions to infrastructure under long-term contracts
- Minimum bill: minimum bill (level not public)
- Contract term: long-term contracts (length not public)
- Ramp: not published
- Exit fee: not published
- CIAC exposure: customer funds new infrastructure through upfront contributions under long-term contracts (APS statement)
- Realistic energization, 50 MW: 2029
- Verification: PARTIAL (utility statement and docket status verified; numbers not public)
- Data as of: August 21, 2026

## Questions

### What does a 50 MW connection cost in Phoenix (APS)?

Arizona Public Service: study fee not published; collateral collateral requirements (formula not public); upfront contributions to infrastructure under long-term contracts; minimum bill minimum bill (level not public); term long-term contracts (length not public).

### When can a 50 MW load be energized in Phoenix (APS)?

2029. JLL 2026 outlook: ~2.5 years average for a new 50 MW data center in Phoenix; APS had 4.5 GW committed and 19 GW in discussion (Aug 2025); Arizona task force flagged ~29 GW of proposed APS and SRP loads (Apr 2026).

### Which tariff applies to large loads in Phoenix (APS)?

Extra High Load Factor (XHLF) rate update with minimum bill and collateral; long-term contracts with upfront contributions; docket ACC E-01345A-25-0105 (June 2025 rate case; pending); status: pending.

### Is this rate proposed or approved?

Not yet final: pending. The table carries the filed terms and the docket to watch.

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## Sources

- [Open Factory Large-Load Cost Table](https://open-factory.com/models/large-load-cost-table/)
- [aps.com (accessed 2026-09-09)](https://www.aps.com/en/Utility/Company-wide-Events-and-Messages/Data_Centers_How_Were_Protecting_Customers_While_Planning-for_Big_Energy_Needs)
- [eta-publications.lbl.gov (Appendix 1)](https://eta-publications.lbl.gov/sites/default/files/2026-08/rate_designs_large_loads_2026.08.10.pdf)
- [constructionowners.com (2026)](https://www.constructionowners.com/insights/how-long-it-actually-takes-to-power-a-data-center-in-2026-a-u-s-market-by-market-reality-check)

Model: https://open-factory.com/models/large-load-cost-table/
Calculator: https://open-factory.com/tools/interconnection-cost/