My home server setup when running at full tilt consumes approx 160 watts iirc.

I'd love it if I could turn off my systems for when I really need them.

Do you usually run it full tilt? What's it typically using on average? I've forgotten how much mine averages, I only remember being surprised how little it sips because it's mostly idle.

It's surprising because reddit (and HN) would make you think you're throwing away tons of money unless you go with some tiny ARM board and that's not true.