If you pay European (German) energy prices, this very well may be the case, in my experience. For some Hetzner servers (especially from their "Server Auctions"

If you pay European (German) energy prices, this very well may be the case, in my experience. For some Hetzner servers (especially from their "Server Auctions"), for domestic customers the cost of electricity alone, disregarding the hardware cost, would sometimes be higher than the rent Hetzner wants.