Leroy Merlin is reviving its electricity savings program, known as the Energy Bonus, as colder weather approaches. The initiative aims to promote its Enki app, which manages connected home devices. This year, the Energy Bonus is being extended to include water heaters through the Enki platform, offering up to 40 euros per year for each connected water heater. The program, now in its third season, originally focused on radiators, which earned up to 15 euros per year per device. The timing of the relaunch aligns with a recent rise in regulated electricity prices, which increased by an average of 2.5% on August 1st, after several decreases in 2025 and February 2026. The Energy Regulation Commission estimated that this increase would cost households consuming 4.5 MWh annually an additional 26 euros per year. Leroy Merlin describes Enki as a "lever of purchasing power." The Energy Bonus works by using a technique called load shedding, where the Enki app temporarily reduces the power of connected radiators for about fifteen minutes or shifts the heating of water heaters during peak winter demand. According to Leroy Merlin, the temperature in homes never drops more than 0.5 degrees Celsius, and the process is fully automated, with no notifications to users. The operation is conducted with RTE, the manager of the electricity transmission network, which pays Leroy Merlin for these load shedding actions. RTE then transfers the bonus to participating households. To qualify, users must connect their Linky meter to the app, and bonuses are paid directly to bank accounts every summer. The Enki Connect box, needed to connect devices to the app, costs 30 euros, which Leroy Merlin reimburses in gift cards when users buy a connected radiator or a module. Electric towel dryers remain excluded from the Energy Bonus. Leroy Merlin explains that while shifting a single device’s consumption by a few minutes has little impact on an individual household, doing so across a million homes could reduce the electricity network’s load by an amount equivalent to "a nuclear reactor." A French reactor has a power output of 900 to 1,600 megawatts, or about a kilowatt per household, similar to the power of a small radiator. However, Leroy Merlin has not disclosed the number of participants from previous seasons. The amounts announced are maximums. For a home with three radiators and a water heater, Leroy Merlin states the maximum bonus is 85 euros per season, slightly more than three times the 26 euros increase linked to the August price rise. However, the bonus depends on the number of load shedding operations triggered during the winter, and there is no guarantee of reaching the maximum. Enki is launching a new external module for less than 30 euros, allowing any electric radiator to be connected to the app, as well as a module specifically for water heaters. An on/off module already available in the store, compatible with both radiators and water heaters, costs 39.90 euros and uses the Enki box. With a maximum of 15 euros per radiator per year, a 30 euro module can potentially be reimbursed after two winters. For those replacing radiators, Leroy Merlin states that 80% of its connected heating products are now compatible with Enki, whether through its own brands or its partners. Leroy Merlin is launching Fuji, a range of 24 radiators under its house brand Equation, starting at 249 euros including tax, with built-in programming. It is also adding models from Noirot, Sauter, Bestherm, and Airelec, starting at 89 euros. The Enki app is also being updated, allowing all heating systems to be controlled from a single screen. A preview feature shows the effect of a temperature change before it is applied. For water heaters, Enki displays real-time power consumption and usage graphs. There is also a Boost mode and four programming modes, including one set to off-peak hours. Enki has been introducing new features over the past two years. In October 2024, the app received an "energy coach" feature. A more practical interface was added in January 2025, and in June of last year, it began comparing electricity supplier offers. For users already heating with electricity using compatible devices and a Linky meter, activating the Energy Bonus costs nothing else, provided they already have the Enki Connect box, and could earn them several tens of euros per year. For others, it is necessary to purchase modules first before receiving the first euro: at 15 euros per radiator per year, it could take at least two winters to cover the initial costs.