Enedis will cut the hot water tanks at noon

Sobriety, instructions for use. From October 15, Enedis will be authorized to cut off the supply to the hot water tanks for two hours at lunchtime. It’s a first. This decision was taken by the Ministry of Energy Transition, in an order dated September 22, and published in the Official newspaper September 26. The information was revealed by the consumer association UFC-Que Choisir.

Users will not realize

The measure only concerns subscribers with a Linky meter, which is the vast majority now, and who have signed a contract with peak and off-peak hours scheduled during the day. In total, 4.3 million households are affected.

The ministerial order allows the distribution network manager to temporarily deactivate the switch-on signal for controllable devices.

The measure, which will end on April 15, will have no effect on the comfort of users, we are assured at Enedis. For those whose cumulus recharges at night, nothing changes. For the others, the hot water tank programming time slot will just be shifted so as not to intervene between 11 a.m. and 3:30 p.m., according to the text. In practice, between 12 and 2 p.m., when consumption peaks.

Up to 2.5 GW saved

The promised savings are indeed significant, according to Enedis. At 12:30 p.m., it represents the equivalent of 2.5 GW which will not be called upon to ensure the balance of the network. At 1 p.m., the gain would still be 1 GW, the equivalent of a nuclear unit.

The weight of electricity in heating homes and producing domestic hot water is much greater in France than in other countries. This is what specialists call the “thermal sensitivity”. Clearly, each time the outside temperature drops by one degree, the electricity demand reaches 2,400 MW, recalls RTE.

If it is very cold this winter, the situation could therefore prove to be very tense, especially at peak consumption, when part of the nuclear fleet is shut down. Hence the call for the multiplication of eco-gestures, which are also intended to add up.

A one-degree drop in temperature in homes and offices would save 2.2 GW between 8 a.m. and 1 p.m., estimates RTE. Switching off unused lights in the house would save 0.6 GW in the evening, which is as much as reducing street lighting and billboards.

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