This Solar-Powered RV Runs Without Fuel Or Charging Stations

3000 watts is about 5 horsepower, so it will not be running very fast after the first 100 miles. However 100 miles is a good distance in Western Europe, and sitting in camp for several days could recharge for the trip home, but plugging in to another source 4KW to 8KW would speed things along.

The electric vehicle side of this is reasonable for the right market (my most used campground is a 40 mile round trip) but the solar charging is at a sort of concept vehicle stage, something to take to the RV show.