solar powered camper up to 450 mile range

A hint of things to come.

“Ecologically minded camping enthusiasts might be tempted by an electric van that is not reliant on charging points, which remain scarce in many places, he said.”

Depends on how long the solar system takes to fully recharge for the next leg of the trip. Remember the campers will be using some of that power.

Their trip was western Europe. Try eastern Europe with that 2-3 inch ground clearance, nice vehicle for a very specific small niche. Pavement dwellers who never have to cross a speed bump.