My plan is to go there at least once a year, so that would work for me

I actually have contingencies for this. There is a ups around that I can use. It is good advice for sure, specifically for countries with fluctuations on the electric grid

I am planning after installing Ubuntu server and get some setup done, to actually sit it out and understand how much the fan is going and how I expect this to be an issue. Since my backups are probably going to be once in a week or so, I do not expect the laptop to have a lot of work (for now is just for file backup, no other services in there except tailscale)

At a later stage I will have to design a strategy to access and make sure is OK. Probably I am going to stick to tail scale and make sure no matter what both tailscale and ssh always start. Sure there can be issues but if minimal services can be guaranteed then it should mostly ok

Thanks for the pointer. Indeed I should probably see first the homelab communities as well

This is a good point actually. I will need to check the laptop can run without battery at all (back in the day I remember this was possible, nowadays I am not sure)