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Hi,

Céliane with Netatmo installation: 15 connected sockets, 7 lighting micromodules, 8 double wireless switches.

On Friday 10 July 2026 my building lost power for over ten hours. When power came back, my whole installation was gone. Two products out of thirty survived. All the others came back with default names (Socket 1 to 12, Light 1 to 5), grouped into an “Elsewhere” room the app created by itself, and the 8 wireless switches had vanished from the installation entirely.

Names, room assignments, switch-to-load associations – all lost.

Worth noting: my home also runs Somfy, Eve and Tado devices on HomeKit, all through the same outage. Not one of them lost any configuration. Legrand is the only system that wiped itself.

It took me about four hours to rebuild everything: re-enrolling the missing products, renaming, reassigning rooms, reconfiguring the associations.

My questions:

• Where does this come from – the Control module, the server-side configuration, or the radio network failing to rebuild after a long outage?
• Is this reproduced on your side? Fixed, or in progress?
• Most importantly: what should I do before the next outage? Enedis has my building on a temporary supply and there will necessarily be another cut when they switch back permanently. I am not spending another four hours on this.
• Is there any way to back up or export the installation configuration?

Happy to provide product IDs, logs or screenshots.

Thanks.