How the Linky meter controls your water heater

How the Linky meter controls your water heater

The energy savings allowed by the measure are not anecdotal: 2.5 GW at 12:30 p.m. and 1 GW at 1 p.m., according to Enedis. Le Figaro

By removing off-peak hours from midday to 2pm to reduce electricity consumption, Enedis may block the supply of electricity to some electrical appliances.

Within twenty-four hours, many French people questioned and even protested the measure taken by Enedis at the request of the Ministry of Energy, in particular with regard to the hot water tanks. The wording, according to which the maneuver involved turning off the water heater of several million households via their Linky meter between noon and 2 p.m., caused outrage among specialists. Le Figaro details the intricacies of the measure, which, as shown on Tuesday, should be completely painless.

Let’s start by clarifying that the measure applies only to households, businesses and local authorities who signed up for power less than or equal to 36 kilovolt-amperes and who chose the so-called “peak hours / off-peak hours” from their electricity supplier. This is exactly such a mechanism “peak hours / off-peak hours”, which has existed since the 1970s, which is actually the basis of the measure taken by the state authorities. This type of contract consists of operating certain devices through an electricity meter at times when the demand on the electricity grid is low. hours said “Poly” – in exchange for lower bills. This deferred control is accomplished by a “a signal by means of an electrical impulse which actuates in one direction or another the remote switch on which it is connected” electrical appliance, explains Nicholas Goldberg, a specialist in these matters.

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Cancellation of off-peak hours from noon to 2 p.m.

A water heater is one of those electrical devices that can be controlled because it works by storage: the water is heated, then stored at a temperature in a tank so it can be consumed later. In the same way, the user can program electric inertial or storage heaters, as well as certain household appliances (in particular, washing machines, dryers, dishwashers) to work during off-peak hours, when the demand for electricity in the network is reduced. weak.

In many contracts, the period of the so-called “dig” happens at night, from 8 pm to 8 am and in the middle of the day. The measure adopted by the government and introduced by Enedis is simply to eliminate the off-peak hours between noon and 2 p.m., sometimes called “off-peak noon”. “Some off-peak hours are inappropriate. Usually 12:00pm to 2:00pm is no longer relevant at off-peak because that is potentially a time of stress on the electricity grid.’, – says Nicholas Goldberg. In short, consumption habits have changed and off-peak midday hours are no longer the same.

Therefore, the cancellation of the mid-day off-peak hours from October 15 will not allow appliances such as electric water heaters to automatically turn on during this time. “This measure will be virtually transparent to the consumer”, recalls Nicholas Goldberg on LinkedIn. The same observation for the UFC-Que Choisir consumer association: “aside from a great need for hot water in the middle of the day, this measure may go unnoticed”. Therefore, households affected by this measure should not experience a shortage of hot water at any time of the day or night.

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Significant energy savings

As already mentioned, contracts “off-peak/peak hours” existed prior to the deployment of the Linky counter. So why are only those houses that are equipped with it affected? Because “Linky allows you to save off-peak tariff by delaying the start of the water heater”, explains Thierry Sudret, Operations Director of Enedis. Without this option, specific to the Linky meter, the measure would be costly for households: all their appliances would be considered to be running during peak hours, and their electricity bills would therefore increase. Moreover, this measure is in no way compulsory. Everyone is allowed to deactivate the control of their water heater during “peak/off-peak hours”, but it is not “no interest”defended by Nicholas Goldberg.

We remind you that the energy savings allowed by this measure are not anecdotal: 2.5 GW at 12:30 and 1 GW at 13:00, according to Enedis. This further limits the risk of power outages during peak hours, which occur daily from noon to 2 p.m. “More than ever, the Linky meter is an important tool for more responsible energy consumption“, kills the dispatcher of power networks.

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