its crazy isn't it. It looks like it might be cheaper for me to hire a Diesel for long journeys/holiday trips.
So using those figure if a rental diesel cost you £100/day you would need to do 1400 miles each day to make that make sense. Every day of your holiday driving for 20 hours at 70mph.
Also, as we know SuperCharging isn't £1 /kwh, it's 67p at the highest now, and will perhaps come down when this price cap for business comes in. Also Diesel isn't £1.80 /l on the Motorway.
My annual 489mile trip from Oxford to Kintyre using my consumption from last trip will cost me
48kwh @ 7.5p (home) = £3.60
91kwh @ 67p (SuperChargers) = £60.97
Total : 64.67
My previous Diesel was a BMW X1 and it achieved about 30mpg on motorway trips.
489 / 30 = 16.3 gallons @ £1.90/l on the motorway = £140.6
So I'm saving 56% compared to real world diesel