Interesting idea. The problem is I don't think there are too many choices for transparant solar arrays. I think the ones that do exist are pretty expensive. Also, I don't think they put out very much current.

But that does lead me to as this question. "What is the current draw on the battery when the car is off and sitting parked?" I'm thinking I may want to add a solar cell somewhere to provide enough current to the car so all power being drawn does not drain the battery.

With all the aftermarket electronics in my car I think sitting for 2 weeks would pretty much drain the battery. It would be nice to know that my car could sit indefinatly.