Haha I’ve had a journey to get here, all because I have a 12th gen Framework.
Initially I got Debian Sid working but ran into power management issues with the module system. I switched over to arch and loved that for a while but frankly I was too careless and kept breaking my system. The way I use Arch it wasn’t a stable daily driver. Then I switched over to NixOS and loved it, but I bricked 3 of 4 ports with a firmware update (again me being careless). Graciously, Framework helped me fix the issue.
After all of that I decided to go with a distro that is officially supported by Framework. Between Ubuntu and Fedora I choose Fedora since they don’t have ads for Ubuntu Pro :) I also like SELinux by default and wanted to broaden my horizons
Very, assuming the refrigerator in question typically runs on a typical power grid you’d find in the US or Europe (source: am electrical engineer)
Mainly because most compressors I’m aware of use alternating current (AC) motors, or at a minimum accept AC power. Batteries alone produce direct current (DC). The simplest way to make this work would involve an inverter (converts DC to AC). Cheap ones probably have at least a 10% conversion loss, so you’re looking at an hour or two at most.
Edit: should also mention that discharging a typical lead-acid battery until it’s all the way flat (realistically below ~11V) does irreparable damage. Might be cheaper to replace the contents of your fridge :)