Xcel Energy Colorado peak
& off-peak hours

Below is every active TOU rate plan we track for Xcel Energy Colorado — 7 plans — with period boundaries verified against the published tariff. No price values; periods only.

Rate Plans

R-ESH Residential Electric Space Heating Pilot

Residential
PeriodSeasonDaysHours
On-Peak All year Mon–Fri 5 PM – 9 PM
Effective
Aug 1, 2026
Verified

RE-TOU Residential Energy Time-of-Use Service

Residential
PeriodSeasonDaysHours
On-Peak All year Mon–Fri 5 PM – 9 PM
Effective
Nov 1, 2025
Verified

C-TOU Small Commercial Time-of-Use

Commercial
PeriodSeasonDaysHours
On-Peak All year Mon–Fri 5 PM – 9 PM
Effective
Nov 1, 2025
Verified

SG-TOU Secondary General Time-of-Use Service Pilot

Commercial
PeriodSeasonDaysHours
On-Peak Jun 1 – Sep 30 Mon–Fri 4 PM – 9 PM
On-Peak Oct 1 – May 31 Mon–Fri 5 PM – 9 PM
Effective
Nov 1, 2025
Verified

SPVTOU Secondary Photovoltaic Time-of-Use Service

Commercial
PeriodSeasonDaysHours
On-Peak Jun 1 – Sep 30 Mon–Fri 12 PM – 8 PM
Effective
Jan 1, 2017
Verified

P-EV Primary Voltage Time-of-Use – Electric Vehicle Service

EV
PeriodSeasonDaysHours
On-Peak Jun 1 – Sep 30 Mon–Fri 4 PM – 10 PM
On-Peak Oct 1 – May 31 Mon–Fri 5 PM – 10 PM
Effective
Nov 1, 2025
Verified

S-EV Secondary Voltage Time-of-Use – Electric Vehicle Service

EV
PeriodSeasonDaysHours
On-Peak Jun 1 – Sep 30 Mon–Fri 4 PM – 10 PM
On-Peak Oct 1 – May 31 Mon–Fri 5 PM – 10 PM
Effective
Nov 1, 2025
Verified
Free · no credit card

Use these Xcel Energy Colorado hours in your app.

Current period and next transition for any ZIP or address.

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250 calls/mo · REST & MCP

or read the docs

FAQ's

  1. What are Xcel Energy Colorado's on-peak hours?

    On the R-ESH plan (Residential Electric Space Heating Pilot), on-peak hours run from 5 PM – 9 PM on weekdays. All remaining hours are classified as off-peak.

  2. Does Xcel Energy Colorado charge more for electricity at certain times?

    Yes. Xcel Energy Colorado 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 Xcel Energy Colorado 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 Xcel Energy Colorado 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 Xcel Energy Colorado's plans?

    For customers on EV-specific plans like P-EV, S-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.