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Reverse tilt kits?

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  • #16
    http://solpowerpeople.com/solar-pv-racking-with-unirac/ has a video by a Unirac support engineer.
    About half an hour in, it discusses some of the problems with reverse tilt mounts.

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    • #17
      In https://www.solarpaneltalk.com/forum...655#post300655
      JPM suggested looking at IronRidge's adjustable tilt leg.
      http://files.ironridge.com/roofmount...esignGuide.pdf
      IronRidge's install manual
      http://files.ironridge.com/roofmount...ign_Manual.pdf
      doesn't quite say how to attach the tilt legs to the roof.
      They do sell "tilt leg standoffs", and the video describing how to use the tilt mounts,
      https://www.youtube.com/watch?v=_PvCi-BfygY
      shows them being used with standoffs... but the tilt leg standoffs are "for use with 1 to 10 degree tilts only".
      What do you use under the U-feet if you don't use standoffs?

      Can someone describe how they've mounted IronRidge tilt legs to a sloped roof?

      (I ask because my installer has proposed mounting them on
      FastJack standoffs, and the PE hasn't commented yet. The FastJack standoffs
      use only a single lag bolt, and to my untrained eyes don't seem intended for this application.
      The PE has previously emphasized that two bolts are needed.)

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      • #18
        Originally posted by DanKegel View Post
        In https://www.solarpaneltalk.com/forum...655#post300655
        JPM suggested looking at IronRidge's adjustable tilt leg.
        And others as a suggestion for places for ideas only. Not a recommendation as to suitability. My suggestion to consult and seriously consider the opinions of a P.E. qualified to practice in that area of engineering is still good.

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        • #19
          Originally posted by J.P.M. View Post

          And others as a suggestion for places for ideas only. Not a recommendation as to suitability. My suggestion to consult and seriously consider the opinions of a P.E. qualified to practice in that area of engineering is still good.

          Yup. I'm working with the P.E. the solar installer hired.

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          • #20
            Originally posted by DanKegel View Post


            Yup. I'm working with the P.E. the solar installer hired.
            I understand that from prior your posts. I appreciate the value of asking questions, and don't want to sound anti-inquisitive, but if you're already working with a P.E., why ask questions here ? Can't you ask the P.E rather than seek unvetted opinion from folks with no skin in the game ?

            If you don't like what you have or what you're getting, maybe you should ask for your money back, or hire your own P.E.

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            • #21
              Neither of them seem to have experience with reverse tilts, which isn't surprising. I tend to overload people with questions; I'm trying to learn here so I waste less of their time. And of course I try to piece together what I can from manuals and tutorials on the internet so I waste peoples' time less here.
              Last edited by DanKegel; 02-11-2016, 03:47 AM.

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              • #22
                Originally posted by DanKegel View Post
                Neither of them seem to have experience with reverse tilts, which isn't surprising. I tend to overload people with questions; I'm trying to learn here so I waste less of their time. And of course I try to piece together what I can from manuals and tutorials on the internet so I waste peoples' time less here.
                Not surprising to me in So.CA. However, many such systems do exist. I can think if 2 off the top of my head that I drive by on a daily/weekly basis. If you go to northern latitudes, they are quite common. I suspect a decent structural P.E. could come up with or check an existing design. Solar array structural design ain't rocket science, and what you have is not that big.

                I'd offer a guess, but not an opinion that your biggest hurdle, after the strut issue, will be getting the roof and the attachments to it safe, fit for purpose and correct.

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                • #23
                  Yeah, they're common in Australia, and there are installers in California who have pictures of 'em ( e.g. http://www.raycoenergy.com/projects_...lt-solar.shtml ).

                  That's exactly what I'm trying to tap into -- what are the existing designs? It's hard to scare up any detailed documentation of how reverse tilt mounts have been done in the US.

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