Although it's expensive, it should be a little cheaper...
It's okay....
I got it for the water heater...
I didn't want to mess with power relays and sonoff...
I put it inside an additional 3-position Hager panel so I wouldn't interfere with the main panel and placed it next to the water heater...
Basically, the cable coming from the panel goes into this switch on top and the output below goes to the water heater...
Finally, I have to note that its WiFi in a small 31 sq.m house is not very good and that the motor makes a little noise when opening and makes the sound that a fuse makes when it blows when closing...
But overall everything is okay..
It shows voltage - energy consumption...
It works with smart life, connects with the red switch in pairing and works normally with the red switch in work..
That's it...