Tucson Electric Power Co time-of-use hours

On TRRESDT, on-peak hours run 3 PM – 7 PM and 6 AM – 9 AM and 6 PM – 9 PM on weekdays. Below is every active TOU rate plan we track for Tucson Electric Power Co — 4 plans — with period boundaries verified against the published tariff. No price values; periods only.

For developers & agents

Query Tucson Electric Power Co 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.

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Rate plan schedules

Every active time-of-use plan we track for Tucson Electric Power Co, with its period boundaries.

TRRESDT Residential Demand Time-of-Use Residential
PeriodSeasonDaysHours
On-Peak May 1 – Sep 30 Mon–Fri 3 PM – 7 PM
On-Peak Oct 1 – Apr 30 Mon–Fri 6 AM – 9 AM
On-Peak Oct 1 – Apr 30 Mon–Fri 6 PM – 9 PM
Effective
Sep 1, 2023
Verified
TRREST Residential Service Time-of-Use Residential
PeriodSeasonDaysHours
On-Peak May 1 – Sep 30 Mon–Fri 3 PM – 7 PM
On-Peak Oct 1 – Apr 30 Mon–Fri 6 AM – 9 AM
On-Peak Oct 1 – Apr 30 Mon–Fri 6 PM – 9 PM
Effective
Sep 1, 2023
Verified
TGSGST Small General Service Time-of-Use Commercial
PeriodSeasonDaysHours
On-Peak May 1 – Sep 30 Mon–Fri 2 PM – 8 PM
On-Peak Oct 1 – Apr 30 Mon–Fri 6 AM – 10 AM
On-Peak Oct 1 – Apr 30 Mon–Fri 5 PM – 9 PM
Effective
Sep 1, 2023
Verified
TRDSOTE Residential Demand Super Off-Peak Time-of-Use Electric Vehicle EV
PeriodSeasonDaysHours
Super Off-Peak All year Every day 10 PM – 5 AM
On-Peak May 1 – Sep 30 Mon–Fri 3 PM – 7 PM
On-Peak Oct 1 – Apr 30 Mon–Fri 6 AM – 9 AM
On-Peak Oct 1 – Apr 30 Mon–Fri 6 PM – 9 PM
Effective
Sep 1, 2023
Verified

Frequently asked

  1. What are Tucson Electric Power Co's on-peak hours?

    On the TRRESDT plan (Residential Demand Time-of-Use), on-peak hours run from 3 PM – 7 PM and 6 AM – 9 AM and 6 PM – 9 PM on weekdays. All remaining hours are classified as off-peak.

  2. Does Tucson Electric Power Co charge more for electricity at certain times?

    Yes. Tucson Electric Power Co 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 4 active schedules; tou.tools does not publish pricing ($/kWh) details.

  3. How do I get Tucson Electric Power Co 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 Tucson Electric Power Co 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 Tucson Electric Power Co's plans?

    For customers on EV-specific plans like TRDSOTE, 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.