It's automated with Ansible, pulling ZFS snapshots from my beefy HL15 rackmount NAS, and it's sipping 8.5W while doing so. More to come, here's the story so far: https://www.youtube.com/watch?v=D8EIs8s303k
@geerlingguy#sanoid & #syncoid are really neat. At some point I was even using a #raspberryPi 1 as a backup host, no need for a lot of power/bandwidth if you don't deal with terabytes of changes at once :)