Policy record, subnational
Arizona: APS rate case changes to the Extra High Load Factor rate for large loads (Docket E-01345A-25-0105)
Arizona Public Service's rate case hearing ran from 18 May to 7 July 2026 (31 days). The ACC lists changes to APS's Extra High Load Factor rate, which applies to large load users such as manufacturers and data centres, as a key topic, along with a Formula Rate Adjustment Mechanism. The Administrative Law Judge is expected to issue a Recommended Opinion and Order by late November 2026, and the Commission must vote by 31 December 2026. If approved, new rates are expected to take effect in early 2027. No decision has been issued yet.
Current status
Pending. The terms of the proposed Extra High Load Factor changes are in the docket and not summarised here until a decision is issued.
Who it applies to
APS customers on the Extra High Load Factor rate, including data centres.
Exceptions: Not yet decided.
What it means for cooling and power
Phoenix-area projects planning to take APS service in 2027 face rate uncertainty until the ACC votes, due by 31 December 2026.
Editorial: business implications, not legal advice.
Upcoming dates
- 31 Dec 2026: Deadline for the ACC to vote on the Recommended Opinion and Order azcc.gov (opens in a new tab)
History
- 7 Jul 2026: Hearing concluded
- 18 May 2026: Hearing began
Markets
Technologies
Lifecycle
- Proposed or announced10 Jul 2026
- Consultationnot reached
- Adoptednot reached
- In effectnot reached
Pending. The terms of the proposed Extra High Load Factor changes are in the docket and not summarised here until a decision is issued.
Sources (1), last checked 19 Oct 2026
- What's Next in the APS Rate Case? (opens in a new tab), Arizona Corporation Commission, published 10 Jul 2026, accessed 19 Oct 2026
Last checked 19 Oct 2026 by CoolPower Index research (automated, sourced). Report a correction.
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