[RE-wrenches] Module defect? Cell interconnections

[Benn Kilburn]

Thanks for your comments Brian.  I would also consider these to be "low
grade", even though we did not order or pay for "low grade".  I did get in
touch with the module manufacturer and found out that these did sneak past
their QC checkpoint.  I was told that their general tolerance for the
bus/ribbon alignment is within 1/2 the ribbon width.

I was told that internal arcing is not a concern here because the
individual cell is at the same potential, so arcing should not happen with
the ribbon/bus being misaligned.
Yes, the small amount of cell shading will reduce output, but it is a
minute amount of shading, so the loss is negligible.(?)

I would appreciate any feedback from any other module manufacturers on
this, if we have any on this list?

Benn

*Benn Kilburn *
CSA Certified Solar Photovoltaic Systems Electrician, SkyFire Energy Inc
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On Mon, Jun 22, 2015 at 12:31 PM, Benn Kilburn <benn at skyfireenergy.com>
wrote:

> Wrenches,
> Have any of you noticed misaligned cell interconnections like the ones in
> the attached photo?
> I'm hesitant to use these and I already returned another module back to
> the distributer that had several cells with misaligned conductors as well,
> but just came across these in the order we just picked up.
> I'm waiting for a reply from he mfgr but in the meantime I'm wondering if
> any of you have seen this and should we be concerned with quality or safety
> (arcing?) in the short or long term?
>
> Thanks,
> Benn
>
>
>
>
> Benn Kilburn
> SkyFire Energy Inc.
> 780-906-7807
>
>
>
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