How about having a vault lid you could raise, to be able to transport higher cargo without it getting wet. Could use waterproof canvas or collapsable panels on the sides, and the ramp to seal it from behind. Solar side panels could be great for the solar panels package, just raise and fold out.
I'm sure it will turn out great, hopefully the air suspension will give it enough drop to get it in to my garage. ? But I'm not interested in a small truck, my silverado is 230 inches and fits fine.. Good job on the rendering, I hope to see more ??