Tucson Electric Power peak
& off-peak hours

Below is every active TOU rate plan we track for Tucson Electric Power — 13 plans — with period boundaries verified against the published tariff. No price values; periods only.

Rate Plans

TRRDTT Residential Demand Time-of-Use Tech (R-Tech) [pilot]

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

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

TRRSPT Special 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

TGMGST Medium 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

TGSGSDT Small General Service Demand 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

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

TILGST Large 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

TILGSTB Large General Service Time-of-Use Storage Program

Commercial
PeriodSeasonDaysHours
Mid-Peak Mar 1 – Apr 30 Every day 11 AM – 3 PM
On-Peak Mar 1 – Apr 30 Every day 3 PM – 9 PM
Mid-Peak Mar 1 – Apr 30 Every day 9 PM – 11 PM
Mid-Peak May 1 – Sep 30 Every day 10 AM – 1 PM
On-Peak May 1 – Sep 30 Every day 1 PM – 7 PM
Mid-Peak May 1 – Sep 30 Every day 7 PM – 10 PM
Mid-Peak Oct 1 – Nov 30 Every day 11 AM – 3 PM
On-Peak Oct 1 – Nov 30 Every day 3 PM – 9 PM
Mid-Peak Oct 1 – Nov 30 Every day 9 PM – 11 PM
Mid-Peak Dec 1 – Feb 29 Every day 6 AM – 7 AM
On-Peak Dec 1 – Feb 29 Every day 7 AM – 8 AM
Mid-Peak Dec 1 – Feb 29 Every day 8 AM – 10 AM
Mid-Peak Dec 1 – Feb 29 Every day 4 PM – 5 PM
On-Peak Dec 1 – Feb 29 Every day 5 PM – 10 PM
Mid-Peak Dec 1 – Feb 29 Every day 10 PM – 11 PM
Effective
Sep 1, 2023
Verified

TGDCFCX Stand-Alone Electric Vehicle Charging (DCFCX)

EV
PeriodSeasonDaysHours
Super Off-Peak All year Every day 10 PM – 5 AM
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

TILPST Large Power Service Time-of-Use

Industrial
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

TILPSTHV Large Power Service Time-of-Use – High Voltage

Industrial
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
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Use these Tucson Electric Power hours in your app.

Current period and next transition for any ZIP or address.

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or read the docs

FAQ's

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

    On the TRRDTT plan (Residential Demand Time-of-Use Tech (R-Tech) [pilot]), 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 charge more for electricity at certain times?

    Yes. Tucson Electric Power 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 13 active schedules; tou.tools does not publish pricing ($/kWh) details.

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

    For customers on EV-specific plans like TGDCFCX, 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.