Hello Jason, I installed a 36 module array on a standing seam metal roof in June that I observed “tinging” sounds while working on it over a few days. It also employed the Ironridge UFO system but differs in that mine connected to the standing seams with L-feet paired with S-5! clamps and every single bolt and set screw was hand tightened and torqued to specifications. At first I thought a couple of my metal Acme cable clips holding the PV wire under the frames were popping off or letting down a conductor from it’s grasp but after looking into it repeatedly I determined it was likely just small expansion/contraction events. Temperatures were in the upper 90’s and they’re the black REC 365 modules. The building sits away from the client’s house so if it were still occurring likely know one would notice but I did not notice it the few times I was there working on other details on slightly cooler days. However, if it continued to occur the way I had heard it I could see how it would get the attention of someone if it were a habitable structure.
Nick A Lucchese > On Oct 19, 2021, at 1:04 PM, Jason Szumlanski > <ja...@floridasolardesigngroup.com> wrote: > > Someone reached out to me who had a PV system installed two years ago by > another contractor on her shingle roof. Almost immediately it started having > loud popping noises intermittently, but pretty consistently day to day. The > homeowner thought it sounded like expansion and contraction. That made sense, > so the original contractor came back multiple times to tighten things up. The > problem never went away and lasted about 6 months until it was driving her > crazy and she had the panels only removed. The sounds stopped. Legal > proceedings ensued. Everything was dropped and she now has rails up, panels > in garage, and no clamps. > > The panels have been in her garage for 18 months. I went to inspect today. > She has Quickmount LMount flashings, Ironridge XR100 rails and had UFOs. The > UFOs were tightened so much that they were tearing the t-bolts out of the top > channel of the rail. I don't know if that was from the original installation > or after they came back to try to resolve the issue. The UFOs had also dug in > pretty deeply to the top of the module frames. None of the glass was broken. > > I could not find much evidence of module frames slipping on the rails and > causing marks. The flashings and L-feet are all properly installed in trusses > at 48 or 24-in centers. The square bolts securing the L-feet to rails are all > tight and show no evidence of slippage. The attic looks great. 5/8 ply over > manufactured trusses (southern pine). It's a Gable roof with about 20 feet > eave to ridge. Again, everything looks great in the attic. > > There are two rows of panels. I thought maybe the two rows were rubbing on > each other. But I could not find any evidence on the short sides of the > modules that would suggest this was the problem. > > Has anyone seen this issue before? I'm thinking about putting a few test > panels back up with standard mid clamps rather than UFOs just to see if that > changes anything. > > Jason Szumlanski > Florida Solar Design Group > _______________________________________________ > List sponsored by Redwood Alliance > > Pay optional member dues here: http://re-wrenches.org > > List Address: RE-wrenches@lists.re-wrenches.org > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > There are two list archives for searching. When one doesn't work, try the > other: > https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/ > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > > List rules & etiquette: > http://www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > http://www.members.re-wrenches.org > _______________________________________________ List sponsored by Redwood Alliance Pay optional member dues here: http://re-wrenches.org List Address: RE-wrenches@lists.re-wrenches.org Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org There are two list archives for searching. When one doesn't work, try the other: https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/ http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: http://www.re-wrenches.org/etiquette.htm Check out or update participant bios: http://www.members.re-wrenches.org
