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Peak vs. Off-Peak Electricity Hours

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Consumers in states where they can choose their electricity provider have access to new options like time-of-use plans that let consumers take advantage of off-peak and on-peak hours. Understanding your energy costs will help you make the right choices to save money.

What Are Peak Hours?

Electricity peak hours are times when business and residential customers use the most electricity. How electricity pricing works depends, to a large degree, on demand. When demand is high, utilities and providers must invest in excess power generation capacity. If they don’t have the capacity, they must buy power from other sources, which can be expensive. Much of that extra capacity sits idle during off-peak hours. Buying extra power during peak hours costs money that could be better spent in other ways.

What Are Off-Peak Hours?

Off-peak hours are periods when companies and residences use less electricity. Most businesses are closed at night and thus have lower power demand. People sleeping at home at night also typically use less power. Energy companies don’t have to buy expensive excess power or turn to expensive additional generation resources. The difference between off-peak and peak hours is that off-peak is when electricity rates are lowest.

When Are Peak vs. Off-Peak Hours?

While it is easy to understand peak vs. off-peak hours, the details aren’t always so straightforward. What are peak hours and what are off-peak hours changes by region, utility company, and even by season. It depends on the weather, generating capacity and demand patterns in your area. Here are some general guidelines as to when are peak hours for electricity.

what are peak vs off-peak hours?

Electricity peak vs. off-peak in summer

  • Eastern time zone:   Peak hours: 2 PM - 6 PM     Off-peak hours: 6 AM - 2 PM
  • Central time zone     Peak hours: 1 PM - 5 PM     Off-peak hours: 5 AM - 1 PM
  • Mountain time zone: Peak hours: 8 AM - 11 PM   Off-peak hours: 11 PM - 8 AM
  • Pacific time zone:     Peak hours: 5 PM - 9 PM     Off-peak hours: 9 AM - 5 PM

Electricity peak vs. off-peak in winter

  • Eastern time zone:     Peak hours: 6 AM - 10 AM and 6 PM - 10 PM     Off-peak hours: 10 AM - 6 PM and 10 PM - 6 AM
  • Central time zone:     Peak hours: 5 AM - 9 AM and 5 PM - 9 PM         Off-peak hours: 9 AM - 5 PM and 9 PM - 5 AM
  • Mountain time zone:  Peak hours: 7 AM - 10 PM                                   Off-peak hours: 10 PM - 7 AM
  • Pacific time zone:      Peak hours: 6 AM - 10 AM and 8 PM and 5 AM    Off-peak hours: 10 AM - 5 PM and 8 PM - 5 AM

When demand during electricity peak hours is too high, it can put stress on the power grid. Utilities and energy companies have to add surge capacity or buy electricity from the open market, both of which can be costly. When utilities make the higher prices during peak demand visible to customers with time-of-use rates, this can encourage them to change their consumption patterns. Customers can alter their behavior to use more power at night during off-peak hours to help even out demand.

The times listed above are examples and may differ by state and utility service area, and are subject to change.

How to Save Money with Off-Peak Hours

Switching to a time-of-use plan may save you money if you move as much of your electricity usage to off-peak hours as possible. At the same time, if you also use less power during peak demand, you can reduce your usage of high-priced energy.

  • Know your provider's peak hours. While we have provided some guidance, peak hour pricing varies by provider and is subject to change. Keep yourself in the know and up to date.
  • Install smart thermostats. These devices optimize when your HVAC system runs, ideally less during peak hours vs. off-peak hours.
  • Use smart devices and appliances. Program them to run in off-peak hours.
  • Add solar panels and batteries. Use sunny days to store reserve power and use it instead of power from the grid during peak demand times.
  • Unplug unused devices. Wasting power in standby mode is never a good idea, but doing so during peak hours only adds to your costs.

Save Money by Switching to a Time-of-Use Rate Plan

Take advantage of off-peak hours to pay less for electricity with Constellation’s TOU rate plans*. Compare this with other residential energy service plans to find one that best fits your usage patterns and budget.

 

 

 

*Time of use plans are currently available in Dallas and Houston. Check back with us as we launch these plans in more cities in 2024!

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© 2025 Constellation. The offerings described herein are those of either Constellation NewEnergy, Inc., Constellation NewEnergy-Gas Division, LLC, Constellation Connect, LLC or Constellation Home Products & Services, LLC (d/b/a Constellation Home in Maryland and d/b/a Constellation in Georgia, Pennsylvania and Texas), each affiliates of each other. The prices of Constellation are not regulated by any state Public Utility Commission. You do not have to buy Constellation electricity, natural gas or any other products to receive the same quality regulated service from your local utility. Brand names and product names are trademarks or service marks of their respective holders. All rights reserved. 

Electricity or Gas Supplier License/Order #s and Home Services #s: CA 1359, CTA0032; CT 06-07-11, 01-06; DE 00-162; DC GA06-2, EA01-5; GA GM-46; IL 16-0205, 17-0330; IA G-0010; ME 2000-989; MD IR-655, IR-311, IR-500; MA GS-030, CS-015; MI U-14867, U-13660; NE NG-0043; NH DM 17-024; NJ GSL-0101, ESL-0016; OH 09-153G, 00-003E; PA A-125095, A-110036; OR ES4, RI 2379(Z1), D-96-6(E); TX 10014, B07305101; VA G-26, G-51, E-11A; TX Licenses HVAC TACLA 00107498R, Electrical TECL 343159, Service Plan TSCP #684, Plumbing #43217; GA REG CN-211051