Earlier quoted context omitted.
An N100 minipc or second-hand Dell Optiplex doesn't cost too much more than a rasp-Pi ($100-200), has a lot more power, and will only pull about 10W idle. My optiplex shows as 8.191 kwh last month -> 11w average.
Is 10W idle the lowest one can reasonably get a small home server? As a comparison, that's about as much as my fridge draws on average. Also, a mechanism to maximize the time spent at idle would be useful. Basically all the optimisations done for phones.
There are plenty of old laptops that would be a great replacement, mine draws 8W at idle with 2x2TB SSDs: https://www.kassner.com.br/en/2023/05/16/reusing-old-hardwar...
I’m interested in the next generation: arm64 machines with 2xM.2 slots could do wonders as an idler.