I'm looking to mount a solar panel to the top of my 2003 Pontiac Montana and was wondering how i could do it without any screws? Magnets maybe?
yeah ... use dem magnets to mount it. you might enjoy a site called vandwellers google you tube vandwellers to find them. one problem with mounting it to your roof. when you want to park in the shade out of the suns heat,,, your panels are in the shade.
What mark said about shade is true, but take into account that the solar panel will absorb most of that heat. That is how they work they absorb the energy (heat) from the sun and transfer it into useable power.
In whichever car I'm not using much, I plug in a small solar panel to the cigar lighter socket, and simply place it up on the dashboard. So long as it gets daylight, it's working, it doesn't need full, direct sun. I just slip it between the transmission-tunnel and passenger seat when I get in, and my cars start right on the first turn of the key. It only delivers a very low level of charge, but it's STILL a net-gain, rather than the battery slowly getting a little tired - even the clock in the car, and the armed alarm-system takes SOME current to run, but even the smallest of panels will sort this out for you.