I went for a journey today.
275 km of highway only, round trip, for a total of about 550 km.
Started 100%.
Had to supercharge two times for 40 + 29 kw, arriving at home with 12% left.
So, I consumed 70+88 kw for 550 km, that is pour 3.5km per kw, assuming that the battery erogates the original 100 kw?
I meant, how did you like your new vehicle?
I'll let other comment on your 3.5 km per kw being good. My driving is typically city so my numbers wouldn't be good for comparison. Temp, elevation, and wind direction will all affect that.
You should also check the condition of your tires, especially the inner edges of the rears.