I did a small test this week. Reading other experiences, the range when driving on the highway would be less than on secondary roads and city.

In the morning i did my usual route to Schiphol via the highway A9 and A5. 27.7 km, 55.6 km/u average and 108km/u max. Battery from 33.2 to 15.0 Ah, so a consumption of 18.5 Ah.
Ater work the secondary road via Hoofddorp, Heemstede and Haarlem. 27.2 km, 45.2 km/u average and 88 km/u max. Battery from 33.7 to 15.5 Ah, using 18.2 Ah.
Both trips 100% electrical offcourse.

I really expected that the highway trip would have a much higher consumption, but it appeared to be equal with both 6.3 kWh.