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Old 03-03-2014, 09:51 PM   #29
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How much space do you recommend under the panel?

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Originally Posted by lewster View Post
One thing to remember…………….panels should be mounted above the roof to allow air to circulate beneath them for a cooling effect not on the roof like many types of panels do.
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Old 03-04-2014, 05:41 AM   #30
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How much space do you recommend under the panel?
AM Solar uses proprietary mounting feet that allow you to tilt the panels for a better sun angle. These feet are also adjustable to accommodate for the curvature of Airstream and other RV roofs. I generally mount the panels at least an inch above the roof to allow for sufficient air flow. On curved roofs, one side gets even more space using the highest mounting hole or in extreme cases, a special hi-lift mounting foot to allow the panel to remain flat when traveling.
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Old 03-04-2014, 06:38 AM   #31
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I don't think I would be to concerned about slightly reduced output due to heat since heat also usually comes with longer days .
Basically, if the system will do the job with short winter days, summer will not be a problem.
Regarding shading of panels , there are times we have been able to pick up as much as 2 amps just by cranking down the batwing TV antenna.
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Old 03-04-2014, 05:12 PM   #32
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<snip>
Regarding shading of panels , there are times we have been able to pick up as much as 2 amps just by cranking down the batwing TV antenna.
My TV antenna is in the process of becoming a crank-up rotating dual Yagi wi-fi antenna. I don't know if that will be more shade or less than the old TV antenna was, but it's good to keep in mind!!
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Old 03-14-2014, 09:11 AM   #33
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Renogy also offers a flexible 100w monocrystalline panel for $199 that look promising for an airstream roof install.

http://www.renogy-store.com/100watts.../rng-100db.htm
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Old 03-14-2014, 11:52 AM   #34
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Renogy also offers a flexible 100w monocrystalline panel for $199 that look promising for an airstream roof install.

http://www.renogy-store.com/100watts.../rng-100db.htm

Interesting..........YES! But not ready for prime time yet. AM Solar has been testing a 2500 watt array of these for the past year in a real world RV situation.

They results are interesting. What they found is that under high heat direct sun situations, the calls cup slightly and retain moisture, capturing dust and leaving a film on the cells.

This has been reducing efficiency by as much as 50%. They are working with the manufacturer on new backing materials to alleviate the problem.

Their meager 5 year warranty should also be a consideration. Stay tuned. They surely have potential !!
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Old 03-14-2014, 01:41 PM   #35
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I have four flexible panels on my trailer. there is some flexing of the aluminum skin when the sun shines on them but since they are on the curved section of the roof it does not collect moisture that I have seen. Only had them on one season. They don't seem to get any more dirt on them than the rest of the roof. Also the ones I have are amorphous cells and are not supposed to suffer much loss from heat. But they don't have a very high output per square foot.
Al
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