The estimated battery remaining at the next destination is normally 10% off. I always have to charge 10% more to arrive at the desired estimated charge of 20%
if the reference consumption we use does not work very well for your driving styles, you can easily modify it. For example if it is always 10% more you have to charge, you could increase the reference consumption by 10%, for example ref consumption is 150, then try 150+15 = 165 next.
If you use live data we will calculate the reference consumption automatically for you, but if not you have to find the perfect reference consumption yourself by comparing routes you drive to the results you get.