I'm driving my iX40 for about 4 months and drove 13000 km (8000 miles) with it. Best way to estimate is ABRP with setting of 210 kW/km (approx. 340 kWh/mile) as reference consumption @110km/h (68 miles/h).
- Know that charging from 10% to 60% is going the fastest way. So better arriving with a battery at 10% instead of 30% and charge it to 60-65% then continuing to 80%. (See other post on charging experience)
- Use the navigation of the BMW and set the charging station as a (next) stop. Car will know that you are going to charge and this result in higher charging speed (in my experience: arriving preconditioned = charging @ 148 kW; arriving not preconditioned = charging @ 57 kW)
I can assume that a lot of other considerations needs to be taken into account.
- As you don't know the car yet consider a SOC% at charging point of 15%. Knowing that you can always go lower then the 10% sporadically. (Best case is to stay between 10-80% of SOC%)
- Are their multiple high speed DC charging points in the area? If only one consider to identify a back-up some further on the route and foresee enough charging.
- Look if charging stations are regular free. same remark.
Have a good trip! Enjoy the silence of the car.
Hope we can read the result of your experience soon.