[RE-wrenches] Convex modules

Mon Nov 18 21:46:45 EST 2019

Kris,

It’s my understanding that this is a fairly common defect with thin framed
72 cell modules. I have noticed this convex shape mostly on modules in the
30-35mm range of frame thickness and have personally seen this with 72 cell
modules from Canadian Solar, REC, Hanwha and Yingli. I have yet to see an
issue arising from this, however, the shape can make for an unsightly wave
in an array.

Lackluster response from the manufacturer but it seems like they have been
made aware of this for some while and have chosen not to correct it, which
may speak to the benign-ness of the issue (or to bad QC protocol).

-Chris

On Mon, Nov 18, 2019 at 9:46 PM Chris Sparadeo <c2 at catamountsolar.com>
wrote:

> Kris,
>
> It’s my understanding that this is a fairly common defect with thin framed
> 72 cell modules. I have noticed this convex shape mostly on modules in the
> 30-35mm range of frame thickness and have personally seen this with 72 cell
> modules from Canadian Solar, REC, Hanwha and Yingli. I have yet to see an
> issue arising from this, however, the shape can make for an unsightly wave
> in an array.
>
> Lackluster response from the manufacturer but it seems like they have been
> made aware of this for some while and have chosen not to correct it, which
> may speak to the benign-ness of the issue (or to bad QC protocol).
>
>
> -Chris
>
> On Mon, Nov 18, 2019 at 4:34 PM Kristopher Schmid <solman at legacysolar.com>
> wrote:
>
>> If they were deformed with a tightened strap, it seems to me that every
>> other module would be bowed in the opposite direction...this is not the
>> case.  Every frame is bowed up to the glass side including the one on the
>> end that was installed glass side in for protection.  I will check the
>> glass itself and the centerline of the module.  Modules were palleted and
>> shipped vertically as shown in the picture.
>>
>>
>> Shine On!
>>
>> Kris Schmid
>> Legacy Solar, LLC
>> 137 West 1st Avenue
>> <https://www.google.com/maps/search/137+West+1st+Avenue+Luck,+WI+54853?entry=gmail&source=g>
>> Luck, WI 54853
>> <https://www.google.com/maps/search/137+West+1st+Avenue+Luck,+WI+54853?entry=gmail&source=g>
>> www.legacysolar.com
>> 715-653-4295
>> NABCEP Certified PV Installation Professional
>> Licensed Wisconsin Master Electrician
>> BSEE
>>
>>
>> On Mon, Nov 18, 2019 at 3:21 PM Jerry Shafer <jerrysgarage01 at gmail.com>
>> wrote:
>>
>>> Kristopher
>>> OK great, well not great to me it is a shipping packaging issue, the
>>> cardboard gap is spacing out each module and they were tightened down
>>> untill one by one the frames came into contact and crushed them together,
>>> the reason one is opposite is because it was installed backwards from the
>>> rest to protect it.
>>> Jerry
>>>
>>> On Mon, Nov 18, 2019 at 11:04 AM Jerry Shafer <jerrysgarage01 at gmail.com>
>>> wrote:
>>>
>>>> Module bent or glass warped
>>>> OK Kristopher is the glass warped or is the frame bent, looking at the
>>>> pic, there is cardboard spacing each module so there is a gap. If the
>>>> binders are in the middle then that will bend one or more modules on each
>>>> side, now to bend them all the way through that center binder would have to
>>>> be very tight or strapped on a truck in shipping. If it is the glass then
>>>> its manufacturing and poor QC, my money if it is the frames is shipping and
>>>> or packaging, but that's just me.
>>>> Jerry
>>>>
>>>> On Sat, Nov 16, 2019, 7:12 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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>> --
>
> *Chris Sparadeo*
>
> *NABCEP Certified PV Installation Professional # 042919-015652*
>
> Catamount Solar, LLC
>
> 4 Randolph Ave., Randolph, VT 05060
>
> C_(802) 369-4458
>
> O_(802) 728-3600
>
> www.CatamountSolar.com <http://www.catamountsolar.com/>
>
>
>
> --
Chris Sparadeo

C_802-369-4458
H_802-728-3059
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