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Thread: Any recommendations for guarding of ground mount arrays?

  1. #1
    Join Date
    Jan 2008
    Location
    Coventry, RI
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    68

    Any recommendations for guarding of ground mount arrays?

    Our company sticks mostly with roof-mounted systems on single family houses, but we're branching out and doing a higher number of ground mounts. We've had them fenced in to meet the requirements of 690.33(B) (live electrical components [including PV wires beneath the array] shall be guarded) before, but it seems that there should be a product available that would attach directly to the underside of the modules.

    Anyone have any recommendations?

    Thanks in advance!

  2. #2
    Join Date
    Dec 2012
    Location
    Placerville, CA, USA
    Posts
    18,160
    Instead of a bolt on product, many use hardware cloth or similar metal mesh to construct a cover over the back of panel array.

  3. #3
    Join Date
    Jul 2012
    Location
    Chicago, IL
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    Expanded aluminum is one option, but since it is conductive you may have challenges with bonding depending on the inspector. Another good option is a product called Solar Scrim. It's a little pricey, but non-conductive and less labor to install than most custom solutions. Works best with two rows of modules in portrait and with junction boxes facing each other.

    http://www.solarscrim.com/

    Good luck.

  4. #4
    Join Date
    Sep 2017
    Location
    Napa, CA, US
    Posts
    47
    I think the biggest problem you'll have with ground mounted arrays, is the number of ladders it takes to build them.

    From: http://forums.mikeholt.com/showthrea...54#post1861854


  5. #5
    Join Date
    Dec 2014
    Location
    Washington, USA
    Posts
    82
    Quote Originally Posted by ArcNSpark View Post
    Our company sticks mostly with roof-mounted systems on single family houses, but we're branching out and doing a higher number of ground mounts. We've had them fenced in to meet the requirements of 690.33(B) (live electrical components [including PV wires beneath the array] shall be guarded) before, but it seems that there should be a product available that would attach directly to the underside of the modules.

    Anyone have any recommendations?

    Thanks in advance!
    We use simple corrugated metal panels to guard the conductors and such. I am not sure how they fasten it to the structure. But I know it is just the Home Depot corrugated panels you can pick off the shelf.

  6. #6
    Join Date
    Dec 2014
    Location
    Washington, USA
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    82
    Quote Originally Posted by Mark A. View Post
    I think the biggest problem you'll have with ground mounted arrays, is the number of ladders it takes to build them.

    From: http://forums.mikeholt.com/showthrea...54#post1861854
    Now that's funny!

  7. #7
    Join Date
    Jan 2008
    Location
    Coventry, RI
    Posts
    68
    Quote Originally Posted by Garrison View Post
    Expanded aluminum is one option, but since it is conductive you may have challenges with bonding depending on the inspector. Another good option is a product called Solar Scrim. It's a little pricey, but non-conductive and less labor to install than most custom solutions. Works best with two rows of modules in portrait and with junction boxes facing each other.

    http://www.solarscrim.com/

    Good luck.
    This is exactly what I was looking for. Thanks for the recommendation!

  8. #8
    Join Date
    Jan 2008
    Location
    Coventry, RI
    Posts
    68
    Quote Originally Posted by Anode View Post
    We use simple corrugated metal panels to guard the conductors and such. I am not sure how they fasten it to the structure. But I know it is just the Home Depot corrugated panels you can pick off the shelf.
    Much appreciated!

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