Lol, gigabytes. I think autocorrect might have bit you.

"for free" excluding the insane installation fee (including the economic hit from having to close all those roads while they are being installed) and the insane maintenance costs of keeping the ground under cars clean enough for the panels to be efficient?

It makes far more sense to replace all of the farmland that we are currently growing corn for ethanol on, with solar panels. Not only would the farmers be making free money, we would also generate more electricity than America currently uses.