[RE-wrenches] Convex modules

[Jeff Clearwater]

Yes good thought Jay but it strikes me if we are trying to offset the results of anticipated bowing with crowning its time for a beefier frame or thicker glass. REC modules went with 2 cross bars in their frame when going to 72 cell. I’ve been  observing frames get thinner over time - wondering how a 30 mm frame could do the job on 72 cell mods when we used to have twice that on 60 cell mods. It’s great to save aluminum and weight but not at the expense of panel life. Can’t imagine the impact resistance goes up with less support never mind possible degradation to the wafers due to flexing?  

Any panel manufacturers on the List that can comment?  Any other modules besides RECS using cross bars? 

Thanks

Jeff Clearwater 

Sent from my iPhone

> On Nov 17, 2019, at 2:25 PM, Jay <jay.peltz at gmail.com> 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 <solman at legacysolar.com> 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 <solman at legacysolar.com> 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
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