Jay Not sure what you are implying by this comment. I do not believe that glass is pre bowed by any glass manufacturer that I know of nor on purpose by a module manufacturer. Glass is manufactured shipped and stored flat on a pallet. How were the modules Shipped? If glass down with no packing in the middle of the glass to prevent sagging from truck vibrations, I would say that is the best explanation. Also I believe it depends a lot on how the glass is attached ( or not attached to the frame. Worse case no adhesion or just a rubber gasket would allow sagging from shipping glass face down or up. Best case a fully cured adhesive before shipping. If they are using PV adhesive caulk, (special w/o curing agents that can corrode electronics) and ship before it is cured it almost as bad as no adhesive. It is pretty much known that the best seal the edge of the glass in the frame with adhesive, cure properly and then ship on edge rather than glass up or down in the flat IMHO.
Bill On Mon, Nov 18, 2019 at 11:57 AM Jay <[email protected]> wrote: > I’m wondering if it’s designed to account for gravity sag once the modules > are mounted. Lots of modules I’ve seen especially the larger format ones > seem to be concave with time. > > If I understand correctly, these are bowed up which would allow them to > settle flat? > > Jay > > > > On Nov 17, 2019, at 2:17 PM, Kristopher Schmid <[email protected]> > wrote: > > > The banding is a good thought, Glenn, except that the one module that was > oriented the opposite way was deformed in the opposite direction. This > rules out the forklift idea, too. I will check specs. I doubt that > testing will reveal anything immediate, but I'm a bit concerned about the > potential long term effects. > > On Sat, Nov 16, 2019, 9:12 AM Kristopher Schmid <[email protected]> > wrote: > >> So, I opened up a pallet of Jinko 400 watt half cell modules yesterday >> and noticed that every module was convex to the glass side. The center was >> 1/4 inch higher than the corners. Has anyone else seen this? Should I be >> concerned? Manufacturing issue? Intentional? >> >> Thanks, >> Kris >> > _______________________________________________ > List sponsored by Redwood Alliance > > List Address: [email protected] > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://www.mail-archive.com/[email protected]/maillist.html > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > www.members.re-wrenches.org > > _______________________________________________ > List sponsored by Redwood Alliance > > List Address: [email protected] > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://www.mail-archive.com/[email protected]/maillist.html > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > www.members.re-wrenches.org > > -- William Hoffer 420 SE Wyers Street P.O. Box 1823 White Salmon, WA 98672-1823 [email protected] <[email protected]>
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