Ultra-Low Overnight Rate

Starting November 2023, Enova customers that use more electricity at night, including shift workers and those that electrically heat their home or charge their electric vehicle, could save up to $90 per year by shifting demand to the ultra-low overnight rate period when province-wide electricity demand is lower.

The new ultra-low overnight rate, set by the Ontario Energy Board, will be 2.4 cents per kilowatt-hour (kWh), which is 67 per cent lower than the current off-peak rate, in exchange for a higher on-peak rate.

Delivery of this new ultra-low overnight rate is possible as Ontario continues to have abundant clean electricity during overnight hours. Shifting electricity use to these hours will allow the province to better leverage Ontario’s clean electricity supply, increasing grid efficiency, resulting in potential capacity cost savings for the electricity system of up to $5.7 million per year, helping to reduce costs for all Ontarians.

Current Ultra-Low Overnight Rate pricing and periods (effective until Nov 1, 2023)

ULO Price PeriodsAll YearULO Prices (¢/kWh)
Ultra-Low OvernightEvery day 11pm – 7am2.4
Weekend Off-PeakWeekends and holidays 7am – 11pm7.4
Mid-PeakWeekdays 7am – 4pm and 9pm to 11pm10.2
On-PeakWeekdays 4pm – 9pm24

Quick Facts

  • The new optional third price plan will be available to Enova’s eligible Regulated Price Plan (RPP) TOU and Tiered consumers by November 1, 2023.
  • Families and small businesses can use the Ontario Energy Board’s Bill Calculator to determine what electricity rate plan best suits their lifestyle and will help them save money on their energy bills.
  • The ultra-low overnight rate will help reduce emissions by encouraging the use of more nighttime electricity, which is typically generated from clean, zero-emissions resources like nuclear, hydro and wind power.

Frequently asked questions about the Ultra-Low Overnight price plan

When the new rate is available, you switch to the new Ultra-Low Overnight price plan the same way you make other price plan choices starting in November 2023.

You can use the Rate Comparison tool in My Account or the Ontario Energy Board’s online bill calculator to find out if the Ultra-Low Overnight Rate is right for you.

Kitchener-Wilmot Hydro Inc. and Waterloo North Hydro Inc. merged in September 2022 to form Enova Power Corp. and we are still working to merge our systems and processes. We are programming and testing the new price plan to ensure our systems are billing properly before we launch the new rate.

The default price plan for residential and small business customers who do not select a different price plan is Time-of-Use.

You can find more information about what you need to consider when choosing your price plan on our rates page.

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