@Slim, for a 2 hundread mile (320kms)return trip,and mainly motorway driving, starting on full is fairly essential, and would only require a quick 20minute 50k fast charge if at all, on the return leg, in an ID 4 - 77kw. IF, it was full on leaving.
It should be easily possible to do 320 kms, depending on conditions & load, bearing in mind the WLTP is just over 500kms on this vehicle, but motorway driving at 120kph can really drain the battery rapidly. Even dropping by 10kph can make a big difference.
Big lesson here is really, charge to full the night before longer trips, whilst also being aware of charging points, if its needed, on the return leg home