"Eric"- -What is a "PV" panel? When adding any new item to an RV rubber roof you should first identify which type rubber roofing material you have. The EPDM material is white on top and black on the bottom of the material. IF the material is white/white then it is TPO and a different method should be used. I'm betting yours is EPDM, so--Use Dicor 501 lap sealant to seal up the edges of the panel where they meet the roof material. The 501 is a "self leveling" type material and I can state from personal use of the 501 it does a really good job. There is a 502 material but according to Dicor the 502 should be used on vertical surfaces. Don't be afraid to make 2 or 3 bands of sealant around the edges of the PV panel.
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