The comparison with OVH is a good one. For some reason OVH has much worse PUE, self-reporting 1.24 vs. Hetzner's 1.11. Operating costs are basically just electricity for these places, so their margins are that much worse.
For further comparison, Google at a similar latitude in Saint-Ghislain, Belgium, claims 1.08.
I don't understand anything in your comment, so I'm shamelessly posting some info from an LLM:
> PUE (Power Usage Effectiveness) measures datacenter efficiency - it's total facility power divided by IT equipment power. A perfect 1.0 means all power goes to servers; higher numbers mean more waste on cooling/overhead. OVH's 1.24 vs Hetzner's 1.11 means OVH burns 24% extra power on non-IT stuff, hurting margins since electricity is their main cost. Google hits 1.08 at similar latitude.
For further comparison, Google at a similar latitude in Saint-Ghislain, Belgium, claims 1.08.