APS (Arizona Public Service) time-of-use & off-peak hours

On R-3, on-peak hours run 4 PM – 7 PM on weekdays. Below is every active TOU rate plan we track for APS (Arizona Public Service) — 7 plans — with period boundaries verified against the published tariff. No price values; periods only.

For developers & agents

Query APS (Arizona Public Service) periods programmatically.

One call returns the current period and the next transition time for any U.S. ZIP or address — GET /query/current over REST, or the same data through MCP for AI agents.

Get a free API key Read the docs

Rate plan schedules

Every active time-of-use plan we track for APS (Arizona Public Service), with its period boundaries.

R-3 Time-of-Use 4pm-7pm Weekdays with Demand Charge Residential
PeriodSeasonDaysHours
On-Peak All year Mon–Fri 4 PM – 7 PM
Super Off-Peak Nov 1 – Apr 30 Mon–Fri 10 AM – 3 PM
Effective
Mar 8, 2024
Verified
TOU-E Time-of-Use 4pm-7pm Weekdays Residential
PeriodSeasonDaysHours
On-Peak All year Mon–Fri 4 PM – 7 PM
Super Off-Peak Nov 1 – Apr 30 Mon–Fri 10 AM – 3 PM
Effective
Mar 8, 2024
Verified
E-32TOU-L Large General Service (401 kW+) Time-of-Use Commercial
PeriodSeasonDaysHours
On-Peak All year Mon–Fri 3 PM – 8 PM
Effective
Mar 8, 2024
Verified
E-32TOU-M Medium General Service (101-400 kW) Time-of-Use Commercial
PeriodSeasonDaysHours
On-Peak All year Mon–Fri 3 PM – 8 PM
Effective
Mar 8, 2024
Verified
E-32TOU-S Small General Service (21-100 kW) Time-of-Use Commercial
PeriodSeasonDaysHours
On-Peak All year Mon–Fri 3 PM – 8 PM
Effective
Mar 8, 2024
Verified
E-32TOU-XS Extra Small General Service (0-20 kW) Time-of-Use Commercial
PeriodSeasonDaysHours
On-Peak All year Mon–Fri 3 PM – 8 PM
Effective
Mar 8, 2024
Verified
R-EV Electric Vehicle Time-of-Use EV
PeriodSeasonDaysHours
On-Peak All year Mon–Fri 4 PM – 7 PM
Super Off-Peak All year Mon–Fri 11 PM – 5 AM
Super Off-Peak Nov 1 – Apr 30 Mon–Fri 10 AM – 3 PM
Effective
Mar 8, 2024
Verified

Frequently asked

  1. What are APS (Arizona Public Service)'s on-peak hours?

    On the R-3 plan (Time-of-Use 4pm-7pm Weekdays with Demand Charge), on-peak hours run from 4 PM – 7 PM on weekdays. All remaining hours are classified as off-peak.

  2. Does APS (Arizona Public Service) charge more for electricity at certain times?

    Yes. APS (Arizona Public Service) offers time-of-use (TOU) rate plans where electricity costs vary depending on the period. The period—peak, off-peak, mid-peak, or super off-peak—depends on the time, day, and season. This page lists boundaries for 7 active schedules; tou.tools does not publish pricing ($/kWh) details.

  3. How do I get APS (Arizona Public Service) time-of-use periods in my app?

    Schedules are accessible programmatically via the tou.tools REST API and MCP server for AI agents. By querying a U.S. address or ZIP code, your application can instantly retrieve the current period and next scheduled transition time. Developer API keys are free.

  4. Do APS (Arizona Public Service) time-of-use hours change during holidays or seasons?

    Yes. Peak hours and rate periods can vary by season (typically summer and winter halves) and special holidays. While some schedules like E-ELEC keep stable hours year-round, others introduce super off-peak windows or adjust peak times. Check each rate plan card above for specific seasonal boundaries.

  5. What is the best time to charge an EV under APS (Arizona Public Service)'s plans?

    For customers on EV-specific plans like R-EV, the most cost-effective time to charge is during super off-peak or off-peak hours. Charging during these designated windows significantly reduces electricity costs and minimizes demand on the grid.