@Sebastien137 
I also discovered it after installing it but almost 12 months have passed and still no update has added this feature which, I repeat, also disables it on other devices that support it.

  @__Fabio__ 

I built a whole deco home network and now also added the x50 outdoor. Its SO annoying that this particular unit doesnt support ECO mode. Can we get some official reply? Or is this forum just for people to be annoyed together? 

  @Phazic 

Did you write to support via the app? I did, many times. Maybe we'll have to do it together.

  @__Fabio__ 

I did but I think that it will unfortunately not help... 

New fw seems to enable ECO MODE!

Very strange thing: I updated my outdoor unit to the latest firmware (v1.3.1 Build 20251030 Rel.41614). After the reboot, a new ECO MODE option appeared. I was surprised because there was no mention of this feature in the changelog. I went ahead and configured the settings: I set the 5GHz band to turn off, reduced the power, and scheduled the LEDs to switch off, everything at 11 PM. I tested it, and it actually worked! The LEDs turned off as planned, and devices on the 5GHz band successfully migrated to the 2.4GHz band. The problem? Today, the "Eco Mode" button has completely disappeared from the app. It’s not a huge deal if the settings stay active, as it might just be a bug in the app interface. I’ll wait until 11 PM tonight to see if the schedule still triggers. Not a big problem if the settings still work. It would be only an app bug maybe. We will see today at 11 p.m.

  @__Fabio__ 

There's no firmware available yet to add eco mode to the X50 outdoor unit, at least officially. If I try to reboot just the outdoor unit, I can see the eco function in the app for a couple of minutes and set it up. Then, once it's finished booting, it disappears. Initially, it seemed to retain the eco settings, even though the function was no longer visible. I could see units connected to the 5GHz network lose connection and switch to the 2.4GHz network. Then, after a few days, everything seems to be back to normal. So, no workaround seems to work. Even a smartplug doesn't work because the eco function would have to be enabled manually each time.