People rave about this super adhesive tape. You have to remember this tape is purpose built for aircraft, designed to be applied to a well understood engineered surface. An RV roof is not a comparably well engineered surface. Sure the tape may stick to the visible surface, but what of the materials beneath that? The adhesive on the tape probably far out classes the adhesive on the roof if any. Your panels may cause the roof material to separate and start bouncing around and before long, the panels are hanging over the side of the RV being held as long as the MP4 connectors last. There is no replacement for brackets, SIKAFLEX or 5200 adhesive caulk and some stainless screws and brackets. I used L brackets with #12 ss screws that I mounted to the roof making sure to position them where I could feel a roof joist I could screw into. The L brackets have three SS screws going into the solar panel frames for a very good solid connection all set into very durable adhesive caulk as mentioned. The solar system with 4 panels is working beyond expectations. I have not needed to plug into shore power since installation. On another note some people miss about the DC to DC charger, You really need to get one if you are going to run lithium batteries. Lithium batteries will accept so much charge current, they will place enough demand on your alternator that it will start smoking and burn out. Also, if you have a 12 volt charge wire, disconnect from the RV because it will not be doing you any good. It will probably operate at a lower voltage than the DC to DC charger and back feed to your vehicle throwing off your vehicle computer engine management control readings. What you can do with that 12 volt charge wire is use it as the engine running trigger wire for the DC to DC controller, turning it on and off when the vehicle is running or not. Confirm the 12 volt charge wire is key controlled. There you have it, an honest 2 cents worth with inflation accounted for. If you're interested, here's the video I did showing off my solar setup, though it's not intended as a technical how to installation video, but just a show and tell. Take care...
Solar System Show and Tell