Choosing to have a dual meter at home can offer several benefits. The first is consuming during off-peak hours respecting the time periods.


The dual meter is the most widespread type of electricity meter in Wallonia. But do you know exactly how it works? Do you know if day/night tariffs are cheaper than conventional tariffs? To find out, keep reading!

The principle of a dual meter

The day/night meter is special in that it has two indices: one for peak-time consumption (daytime, weekdays) and the other for off-peak consumption (night time and weekends). The advantage of this system is clearly financial: at off-peak times, electricity is cheaper. This means that households that endeavour to use their most energy-consuming appliances at off-peak times will likely reduce their electricity bill.

What must I do to enjoy the day/night tariff?

Energy contract

If you currently have a standard meter and would like to replace it with dual one, you must address your distribution system operator (DSO). In addition to transporting electricity to households from the high-voltage grid managed by Elia, it is responsible for several technical services. These include commissioning, increasing meter power, new connections to the local electricity grid, and, therefore, also changing the meter.

Having replaced the meter, you will enjoy the dual hourly rate provided you have amended your electricity contract or have canceled your current energy contract to subscribe another one. Take this opportunity to compare the prices of all energy suppliers to increase your future savings. Of course, since the price of electricity depends on the supplier and the contract, it is in your interest to find the best electricity deal on the market and subscribe to it.

In addition, once the dual meter is activated, you must adapt your consumption habits. From now on, you must use your washing machine, dryer and dishwasher at nights and at weekends! Otherwise, the benefits of the day/night contract are lost, as is the prospect of paying less.

Peak and off-peak time periods

Peak and off-peak hours are calculated differently depending on the distribution system operators.  If you do not know which DSOs operate in your area, you can use our tool and then contact the organization in question to find out the established periods.

  • AIEG: 085/27.49.00
  • AIESH: 060/45.91.60
  • Fluvius: 078/35.35.34
  • ORES: 078/15.78.01
  • Régie d’électricité de Wavre: 010/22.42.43
  • Resa électricité: 04/220.12.11

If you live in the Brussels area, you will find the list of municipalities and peak and off-peak periods on the Sibelga website (PDF).

off-peak hours - Clock and its reflection with reference to the double rate
With a dual meter, your consumption is billed at two different rates depending on the time of day.

In most cases, peak periods for electricity are from 7 am to 10 pm on weekdays (Monday to Friday) while off-peak periods are from 10 pm to 7 am on weekdays (Monday to Friday) and the weekend. Otherwise, off-peak periods may be as follows:

  • From 9 pm to 6 am during the week and from 9 pm on Friday until 6 am on Monday during the weekend.
  • From 10 pm to 7 am during the week and from 10 pm on Friday until 7 am on Monday during the weekend.
  • From 10:30 pm to 7:30 am during the week and from 10:30 pm on Friday until 7:30 am on Monday during the weekend.
  • From 11 pm to 8 am during the week and from 11 pm on Friday until 8 am on Monday during the weekend.

Unfortunately, it is not possible enjoy a time period other than the one established by your DSO. Remember, therefore, to stick to it by setting your devices to valid off-peak hours.

Note that bank holidays that fall on a weekday are not considered off-peak hours but as peak hours. However, when they are at weekends, off-peak rates are valid.

Peak and off-peak rates

Are you interested in the option of peak/off-peak hourly rates? Then you need an overview of the kWh price that may be charged to you! There’s no secret to getting a good deal: you need to know and compare the electricity prices of several suppliers.

SupplierDeal nameDual hourly ratesAnnual subscription (€/year)
EngieEasy Fixed17.5813.754.49
EnecoSoleil&Vent Fixe19.7716.660

You need to find out whether these electricity prices will be better for you and if it is worth your while changing from a standard meter to a dual meter. Given that changing meter typically costs between 270 and 400 euros, this is not a decision to be taken lightly, especially since distribution costs are also higher with a day/night meter than with a standard meter. So, it is important to first calculate the return on investment before taking the plunge.

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