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post #1 of 16 (permalink) Old 19-03-2011, 10:43 Thread Starter
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Solar Panel and wood

I am about to fit a BP 50w solar panel. I have seen the posts about going to B & Q to buy aluminium to glue to roof and then attach the solar panel to.

Can someone give a reason why I cant use shaped (round edge) wooden 2" architrave. Painted and then glued to the roof then attached the panel to that.

Do I need to leave a gap in the wooden frame to allow through flow of air, or will just raising the panel off the roof suffice.

Am I missing something??
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post #2 of 16 (permalink) Old 19-03-2011, 11:09
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I think you are missing something Steve.

Wood rots - and no matter how carefully you preserve and paint it, after a couple of winters of frost the water will get in. The stuff you are talking about is probably Ramin, and that would have a life expectancy of about a week! (I exaggerate slightly!!! )

A thick sheet of marine ply is your best bet if you really want to use wood, but it ain't half expensive.

Western Red Cedar is one of the less "rottable" woods as it is quite oily, but even that will go in the end.

I'd stick to aluminium if it were me. More difficult to work with, but much safer in the long run.

Hope this helps.

Dave
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post #3 of 16 (permalink) Old 19-03-2011, 11:35
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Why not invest in a mounting kit, or at least, some corner brackets that can be glued to the roof with Sikaflex. Sun and Aire in Hexham (I gave the link in your previous thread) sell these items. Much safer and more robust in the long run.
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post #4 of 16 (permalink) Old 19-03-2011, 11:42
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Solar Panel & Wood

Hi Steve just a thought

I went to the local scrap yard & got a 3 mtr lenght of Ally angle for 4

Good Luck

Regards

Norman
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post #5 of 16 (permalink) Old 19-03-2011, 12:23
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Is this to attach the actual panel to the roof??

We use a set of unirac feet (RRP 20). They bolt onto the panel first, then you geocel/skia them to the roof. They maintain a gap under the panel to allow for cooling (as a hot panel is an inefficient one).
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post #6 of 16 (permalink) Old 04-04-2011, 22:00 Thread Starter
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Solar panel fitting

Hi all after much head scratching I managed to attach my panel by utilising 2 aluminium cross members that are attached to the edge rails on my Arto.

I used slightly larger spacer on the front to give the panel a slight incline front to rear. To ensure it stays on at speed.
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post #7 of 16 (permalink) Old 04-04-2011, 22:14
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hi stevee4, if i were you i would put in some more spacers and bring the panel at least up to the level of your roofbars because when the sun is low the shadow on even a tiny part of your solar panel will reduce its output to almost zero. if you raise it a bit then the roofbars cant cast any shadow. all the best sean
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post #8 of 16 (permalink) Old 05-04-2011, 12:08
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Get some smoothrite silver on that metalwork... its showing signs of rust already! Apart from that, a nice bit of engineering.
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post #9 of 16 (permalink) Old 05-04-2011, 12:10
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On second look at picture... why didnt you move the bars closer together and just mount the panel directly to the bars?
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post #10 of 16 (permalink) Old 05-04-2011, 12:20
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Just going off at a slight tangent (I am thinking of fitting a panel) what effect does something like that have on fuel consumption - it looks to me to be as bad as a roof rack.
What is the best way of minimising the adverse effect of panels on the roof?
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