Put solar panels on the roof of the hybrids and all electrics

There is real acreage on the roof of my Focus EV . . . Why isn't that a solar panel? The same is true for the CMax.

Put solar panels on the roof of the hybrids and all electrics to give that little boost only the sun can provide.
joe b 10/08/2013
Great idea it would ad to battery life an aid in cooling and Heating.