Well, apparently the idea was to use solar panels, in order to not tap into the general grid.
So that leaves having a solar powered battery bank large enough to charge up an electric vehicle's batteries over night. I'm way to lazy to look up any numbers, but based on that many electric vehicles apparently need at least eight hours to get fully charged, that would require a seriously sized bank of batteries...to charge the batteries in the car. Yes, we now have two sets of toxic containers to deal with, both of which are also expensive.
In my mind, and if using the grid is okay, the spot light shining on the panels at night almost makes sense, by bypassing the need for a large battery bank.
Not as much sense as just plugging into the grid, of course, and nowhere near as much as just putting gas in a real car, wherever, as needed.