There’s something that people really fail to grasp with solar, and that’s the fact there is bugger all energy in the sun, and you need a huge surface area to get any meaningful energy.
A home solar array often takes up a significant chunk of the roof area, and the amount of surface area a car typically has means that even perfectly efficient solar panels wouldn’t collect enough energy to significantly contribute to the vehicle’s range.
There’s a good reason why vehicle manufacturers don’t bother adding them.
Solar panels are also added weight, which reduces range. Any way you look at it, it makes more sense to have the solar panels at a base location you go back to.
I guess an RV, or a camp trailer, makes sense to have panels on it, but that’s about it
Solar panels are incredibly thin and light. There is no reason not to include them.
Price. Large standardized panels are cheaper. Until you cover static otherwise unused space with solar, there’s no way this car is a better use of money.