I also planned to make a electrical car with solar panels and electrical fuel instead of fossil fuels.
I have a similar end goal, but will most likely wait for an auto manufacturer to release an electric 4x4 van that meets my mileage needs. The range needed just isn’t available on the market yet. A custom solution would be a lot of fabrication work.
In the meanwhile I’ll get plenty of usage out of my truck/gfc setup for the next few years.