Comment by 8fingerlouie

drives are spinning. 4x8TB WD Red Plus, which uses 3.4W idle, and assuming 20W for the NAS it's at ~34W (measured 35W). Mac Mini uses 4.6W idle (headless). POE consumption (measured by switch) is 37W (I'm aware there's overhead in AC/DC conversion).

All in all the total consumption at the wall is 96W, but as i have written in another comment, i was 7-8W off, meaning the quoted setup of mine uses 7-8W more than the 66.7W OPs NAS idles at.