Particularly those with trailers. The trailers have all that vertical and horizontal surface. Let’s extend the range of each by putting lightweight solar panels all over the trailers. (Okay, maybe there aren’t really lightweight efficient inexpensive solar panels yet, but let’s pretend.) Not all of them will face the sun at once, but at least some of them will all the time. They can collect and charge throughout the daylight hours whether the truck is driving or not. Less stops to recharge. Less recharging through the grid if the electric fleet is plugged in at night. It could happen. Someday. Better batteries, better solar panels, eventually each truck could be independent with unlimited range.