And, of course, the structure that changes the suns power to electricity is free.
So far, there has been no indication that GM is providing any funding, just allowing the solar panels to be erected at their dealerships. I don't know, and no one else does either from the released news, where the money is coming from, who is paying for what, or any other numbers anywhere.
BTW: I'm still awaiting someone showing me where they got the information the 40 million shares the CEO is paying himself are restricted. That 40 million number is the only number we've been given, so I'm curious.