Relying on 4 nvme drive for low power isn’t ideal as nvme drive needs about twice more power compare to sata SSD.

On your Xiaomi first time you launched app, you can determine wether you always allow or allow on prompt (but you should still be able to manage that setting afterwards). You also need to disable battery optimization for that app and set app to be able to auto launch in background. This is at least what I do with my home assistant app to determine GPS location in background (app record every 15mn) and no issues with battery draining.

Don’t have particular case to recommend as the one I have has been printed but get one where you can add an SSD. SD card are not well suited for home assistant due to the amount of overwriting.

So pc is consuming 13W, this is with one nvme + one SSD, pic at 30w for a few seconds at boot.

Curious, might have same machine but do consume a bit more, do you have one SSD + one nvme?

It is a beelink mini s12 pro https://www.bee-link.com/beelink-mini-s12-pro-n100-mini-pc-clone-1

Do also have a n100 processor running proxmox with 3 VM. Can’t try right now but can come back in a few days to let you know how much power it draws

If z2m, zwavejs,… Are installed from the adon store of HA, all you have to do is create a full backup of HA, and all your automations will be saved and restored automatically.

This might help you to choose https://github.com/meichthys/foss_photo_libraries