Whatever way I Google it the supercharger UK tarif comes up as 28p/kWh
Ahh, interesting. Free vending seems more plausible than £1/kWh. I guess there’s no way for the car to know that there’s no charge for the uh, charge.
Supercharger rates vary across the country from 22p/kWh at Heathrow to about 37p at the busiest chargers. The only way to see the actual rates is to sit in a Tesla and look (the rates on the Tesla website are somewhat optimistic).
Having that said with Tesla you pay per DC kWh poured into the car’s battery whereas some other providers charge per AC kWh prior to rectification, so with a 10-15% loss the comparison is a little harder.