I'm hoping that if mine fails I can get another the same size to replace it with The brackets are stuck to the roof not the panel https://www.ebay.co.uk/itm/CORNER-MOUNTING-BRACKET-SOLAR-PANEL-FIXING-MOTORHOMES-BOATS-80W-100W-120W-150W/302737884790?hash=item467c958676:g:PY4AAOSwRvhdQQVAHow hard are they to remove when they fail?
mine's a sprinter with a steel roof. if it was a flimsy , i'd use through bolts with big washersi used 292i as advised by aandncaravanservices in their solar panel install guide however the roof bolts bit seemed ridiculous to me. The top layer on a motorhome is a very thin sheet, presumably aluminium, glued to an insulation board. If the sikaflex gives way and a solar panel is loose then no way is a roofing bolt going to hold a panel in place screwed into 1mm of aluminium whilst meeting a combined 110mph uplifting headwind as suggested by some folk. Still if it makes people feel better about the limits of a glue that holds aircraft and speedboats together then so be it.
not always I fitted a pair of semi-flexible panels with a Fibreglass Backing to a pop-top roof which was not painted, but a self-coloured GRP (I confirmed this with the manufacturer before fitting). In that case I used 3M VHB Tape - and around 15 Metres of the stuff - that sucker ain't going anywhere (in fact as soon as the panel laid down it was solid).don't forget , no matter what the roof is made of , you're just gluing to the topmost paint layer. i use roofing bolts as well
My glass panels are fitted to roof rails; but the roof rails, as well as being taped down, are through-bolted the metal roof with penny washers acting as spreaders on the insided before the nut. I did consider riv-nuts briefly but didn't like the lack of load-spread. I also never considered relying on adhesive to hold on top of the paint (and Sprinter roof paint is renowned for peeling to boot!)mine's a sprinter with a steel roof. if it was a flimsy , i'd use through bolts with big washers
So if you are only going to be gluing on the solar panel, make absolutely certain that the surface area you are attaching it to is cleaner than clean.Thanks everyone for your input.
I've gone with the majority verdict both here and elsewhere on the internet and ordered 512.
''I dont want mine going awol '' or any passers by going ow !You lot have got me worried now... my 2010 ducato pvc has a solar panel right at the front of the roof and being a ducato, paint is already peeling in the gutter areas. I have no idea who fitted the panel nor how it is fixed. I can see white sealant/adhesive but cannot see any screws/bolts due to the design of the brackets. I have not yet had a look under the ceiling covering but will do tomorrow.
I dont want mine going awol