Forum Discussion

Naio's avatar
Naio
Explorer II
Apr 02, 2016

Solar panels on a bubble roof?

So I'm thinking about getting a new (used) van. If I get one with a fiberglass 'bubble' roof, what would be the best way to put solar panels on it?

I talked to a roof manufacturer, who said that if the roof is bearing the weight of the panels than I should line the roof with a box made of plywood. This sounds like a lot of weight to add up top.

Alternately, is there a practical way to transfer the weight to the van's frame?

8 Replies

  • There have been some issues with flexible panels. Techno media, Wynn's and the owner of AM solar have written articles on it.
  • Almot's avatar
    Almot
    Explorer III
    Naio wrote:

    The usual downside of stickons is that they overheat, yes?

    I think the biggest downside of flexible panels is low nominal power (watts) per square foot.
  • Our trailer has a Filon roof and I have ABS plastic mounts that I imported from the manufacturer. These are held on using 3M VHB tape. Surface prep is VERY important.
    The mounts are now available in the US ABS solar mounts
  • Naio's avatar
    Naio
    Explorer II
    MrWizard wrote:
    If you find one that had roof top a/c option
    The roof will be more than strong enough to support the solar panels
    You could always look for some stick down flexible solar panels
    No mounting screws no roof stress, no mounts or brackets


    Oh, good ideas!

    The usual downside of stickons is that they overheat, yes? If I insulate the roof, will that be a problem? Or will the fact that it is not metal still keep things cool enough? It's hard for me to imagine fg getting that hot... How hot is too hot? I could stick a thermometer up there.
  • If you find one that had roof top a/c option
    The roof will be more than strong enough to support the solar panels
    You could always look for some stick down flexible solar panels
    No mounting screws no roof stress, no mounts or brackets
  • Naio's avatar
    Naio
    Explorer II
    rjxj wrote:
    shaped to the roof for a rib effect.

    Use Dicor self leveling or non self leveling sealer on the roof. Do not use silicone.


    Oh, that sounds really nice! Great ideas!
  • I wouldn't build anything out of wood. Aluminum and stainless steel hardware. I would look for the main ribs or other structure that may have been incorporated to give it rigidity. I have used pieces of the white plastic lumber that they sell at HD. It's also going to be a little heavy but you may be able to use it in some key areas as it's very workable. It finishes real well with a table saw or router and may be able to be shaped to the roof for a rib effect.

    Use Dicor self leveling or non self leveling sealer on the roof. Do not use silicone.
  • RoyB's avatar
    RoyB
    Explorer II
    Too bad you ban hasn't been fitted already for sliding lugguge racks on top.

    I was looking at one guy's van that stopped into out local WALMART the other day while I was waiting for the wife. That looked pretty neat holding his two what looked like 120WATT panels on his Van. I guess it was a camper - couldn't see any other clues like a water heater panel or fridge panel etc...

    Roy Ken

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