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My concern with the screw-less mounts for the rigid panels is that you are using Dicor or other adhesive to glue them down to the TPO material. The TPO is flexible and can stretch. My concern is that the wind is going to get under the panels and over time will it begin to lift and pull on the TPO. I would think it could cause it to stretch and tear.
I would use EtrnaBond if I was screwing down mounts for rigid panels and would be less concerned with leaks. But I would prefer if I could find the aluminum frames to screw them into and not wood.
That is why I went with flexible panels. They are lighter, easier to mount and two panels can generate up to 320 Watts. They are more expensive but the price has been coming down.
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