Shelly switches in a mountain cottage?

[exotic vortex]

I have a cottage in the nearby mountain (in Serbia), and I want to add few Shelly switches (eg. Shelly 2PM Gen3).

As it is in the mountain, there often are power outages for hours. When there's a storm, it happen for the main fuse (not sure how it's called - looks like the other fuses and has 3 switches and stands before all other fuses) to get turned off, so I need to manually push it up. I've also heard people saying that the power is not stable (don't know what that means).

Initially, i'd like to have such switches for the lights, but in future i'd also like to put few on some devices (eg. water heater) and power sockets.

I've talked to some local electricians i could find, but they all said "buy the device and we'll see what we can do".

Would you use such devices in a place like this? My biggest concern is that it is a place where there's nobody most of the time. Not a person even nearby. What's the worst thing that is possible to happen?

[lean iris]

For the Shelly devices, I'd say worst case would be a factory reset, if the power outages mimic the reset pattern. If the breakers/fuses turn everything off, worst case is that nothing will work until it gets turned on again.
For a Home Assistant the consequences can be more serious. A loss of power causes an ungraceful shutdown and can cause data corruption - which can lead to HA not starting. A UPS (uninterruptible power supply) can help with that for a short period of time. More sophisticated ones could communicate with HA and shut it down gracefully before the battery is fully drained.
Then you would have to have a strategy how to start it again, when power is available again.

[exotic vortex]

My biggest concern is a switch catching fire and having nobody around to notice that something has went wrong. Am i overthinking it?