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Thread: solar panel expansion

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    Diver's Avatar
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    solar panel expansion

    I' reading up on solar panels and contemplating few design ideas. I will most likely build a covered pergola, that will be 12x40 in dimensions to support the panels. It will be slightly slanted at about 30 degrees.

    Originally I thought about placing 2'x20' or 4'x20' panels horizontally, but it seems that vertical orientation is preferred and sagging might be an issue even at small angles of incline. Another possibility is to place 12' or 8' long panels vertically to avoid that issue all together.

    I read that the panel expand and contract with the temperature. Do they do that along 2 axis, the same directions as tubes go or perpendicular? I would have to put a good number of vertical panels in an array and I'm wondering how to accommodate if expansion takes place perpendicular to tube direction.

    Thanks!
    26K In-ground Vinyl Pool | Hayward DE4820/SP0710XR50 filter | 1.125 HP Dual Speed Hayward Super Pump | Aquasol Solar

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    Casey's Avatar
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    Re: solar panel expansion

    I can not answer as I do not know but maybe someone else does.

    I'd bet you my bikini you'll never get TFP water from a pool store!

    24' Sharkline Venture De Filter

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    Diver's Avatar
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    Re: solar panel expansion

    thanks Casey,

    after some thinking, looks like i'm going with 4x10 panels oriented vertically so it's no longer an issue
    26K In-ground Vinyl Pool | Hayward DE4820/SP0710XR50 filter | 1.125 HP Dual Speed Hayward Super Pump | Aquasol Solar

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    Isaac-1's Avatar
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    Re: solar panel expansion

    They do expand and contract in both directions, this is something you need to account for in your mounting design including the feed plumbing. If I were going to do what I picture you are proposing, I would use one of the stiffer 4x10 or 4x12 panels, like the Technosolis I used for my solar install (they are about as rigid as a thin sheet of plywood), instead of one of the individual tube style collectors which flop more like a wet noodle.
    Indoor 20x40 35,000 gallon vinyl pool with 1.5 HP 2 speed Jandy FloPro pump, Hayward EC75 Perflex DE filter, 11 4x12 Techno-Solis solar panels w/ Aquasolar controller, Aquabot Turbo T Robot Cleaner. Also LMI metering chlorine dispenser pump and HotSpring Jetsetter
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    Mod Squad pooldv's Avatar
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    Re: solar panel expansion

    I have a similar solar setup. There are pics of my solar install in my build thread in my sig that might be helpful.
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