Sourced from road solar? Probably not. Still, power sourced from solar or wind in general and adequate to offset some of the "maintain speed" level of power dr

Sourced from road solar? Probably not. Still, power sourced from solar or wind in general and adequate to offset some of the "maintain speed" level of power draw? That seems more likely. If you have some way to provide maintenance levels of power during movement that may mean a significant savings in battery weight and overall cost, and if you don't think that matters take a look at the skirts under a lot of trucks designed to reduce drag.