For my home server, I use Restic and a cronjob to weekly take snapshots of all my services. It then gets synced to a Backblaze B2 bucket (at $6/TB/mo). It’s pretty neat, only saving the difference between the previous and current snapshot, removes older snapshots, and encrypts everything.
The car can take 120/240 V AC input. Internally, there’s a AC to DC rectifier that brings the voltage up to the internal battery’s voltage. For 120V 15A charging, this is pretty slow in general since EV batteries have a large capacity.