your VPS will have a shared CPU with hundreds of other customers... So will probably be using far less power (for you) than your home server.
In Europe at least, most industrial users were paying more for electricity than residential users over the winter (gas shortage). Governments subsidized residential users more than most businesses.
Actually, at 150 / year you can rent a VPS (or two!) as well, always-on etc, which... kinda shows how skewed consumer price for electricity is.