So after a few weeks of short local trips (<4 miles) and hardly ever getting much above 2mls/kwh after using pre-heating, HVAC, heated seats etc., all without using a charger at all, I had a long 120 mile trip up and down the A1 yesterday - starting and finishing at home with a 10 minute handover at a servce area.
I was'nt in a rush so thought it would be a good test to see the very best I could get at a steady run at 60mph. Temperature was 9c and it was raining and quite windy. Due to the rain I had to manually turn on the headlights for the whole trip. The car started fully charged with a preheated battery and cabin (all done while charging). I set the car to Normal driving, High Regen and then OPD when allowed, Energy Saving Mode ON, HVAC set to ECO, AC off, with a manual fan speed of 3 and a temp of 25c. I did'nt change the temp at all and checked that AC stayed off a few times (which it did).
On the way up (northbound) I averaged 3.5 mls/kwh driving like a granny and keeping to 60mph all the time. On the way back after a 10 minute stop the average finally dropped to 3.3 when I got home so I'm assuming I averaged about 3.1 on the way back southbound. I'm also guessing the difference was probably the southwesterly headwind which I could feel on the way back.
61 miles Northbound :-
122 miles Total (Northbound and Southbound) :-
Interesting (but not surprising) that having the cabin and battery fully preheated at the start seems to have avoided the HVAC / AC using any meaningful kwh. It usually accounts for a good few 2-3kwh on my local short trips in the cold when fully using AC, Heated Seats etc without using the charger.
Also interesting is that Energy Saving Mode seems to turn off the front motor.
A similarish trip back in September at a constant 70mph got me 3.0 mls/kwh overall at 16c outside temp.