Working with a realistic table of own tested car how far away you can really go. But will use worst condition to not disappoint. That will says use roads with acsends and driving in the speed limit and calculate how much energy the car using. And even info about temperature, how many pepole is in the car, stuff in trunk and seats etc etc etc. Using roads from Oslo to Geilo, Oslo to Hemsedal and Oslo to Rondane and Oslo to Tyinkrysset.
Hope car dealers and car importers to borrow cars to do the test. And that is not only driving, but charging tests and will be more than 1000 km testing and up to 5000 km testing on car.
Tables will have data for winter, spring, summer and fall.