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Discussion Starter #1
looking to mount Renogy’s flex solar panels to plexiglass on top of a alumines brand roof rack, verses directly to the roof rack floor, good or bad idea.. thought it might give the panels more support?!
 

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Discussion Starter #3
I am not sure why you would want flex panels and then mount them to a non flexible surface. Flexible panels are more expensive per watt and seem to take up more space per watt.
They are lighter in weight - already purchased the solar panels
 

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Suppose that you have a 100 watt solar panel that is 15% efficient. That means that 85% of the sunlight falling on it is turned into heat and 15% is turned into electricity. For a 100 watt solar panel that is about 1000 watts of heat - so roughly 10 each 100 watt light bulbs.

The heat has to go "somewhere" and if you mount them on fiberglass (an insulator) it mostly just makes the panel hotter until it fails.

If they are mounted on a conductor (Aluminum or Steel), this helps a lot. If the backing is ~ 2x the size of the panel, this helps more. If there is some spacing for air to get under the conductive backing material this also helps.
 

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Any Polycarbonate or acrylic glass that is thick enough to support weight would be very heavy.
Much heavier than aluminum.
Plus it would deform from excessive heat, as mentioned.
 
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