[RE-wrenches] Canadian Solar "blemish"

[maverick at mavericksolar.com]

I have seen this pattern twice.

1. Lightning strike near the array. But the canals are bright white or deep black. I have two of those panels for testing and they still work sorta.

2. A bad batch of EVA or an over-cooked batch of EVA during assembly perhaps.  Of course, the photo does not lend itself to determining the depth of the fracture: at the glass layer, at the EVA layer or at the silicon layer.  If it is at the silicon layer, then the current would drop. 

Fort that panel, Each cell is a 0.5 volt generator at About 3 amps or so. If you crack the cell (Cleve it straight across) it becomes a 0.5 volt 1.5 amp cell. So I think it would mess with your vmp overall if the silicon was cracked.


Thank you,

Maverick


Maverick Brown
BSEET, NABCEP Certified Solar PV Installer ®
President & CEO
Maverick Solar Enterprises, Inc.
Office:     512-919-4493
Cell:        512-460-9825

Sent from my HondaJet!

On Nov 9, 2011, at 3:41 PM, penobscotsolar at midmaine.com wrote:

> Hello all,
>   We have a customer who has acquired, over the last ten years or so, a
> large array with several different makes and models of panels, all
> installed by a qualified electrician and the customer. They have done
> an excellent job as far as self installed systems go.
>   He just sent me a picture of one of his Canadian Solar 210's with a
> very unusual pattern on it (actually under the glass). The panel is
> about three years old and shows no decline in output, but he is
> concerned with the very obvious visible pattern. I have never seen
> anything like it.I've attached it to this email. Anyone?
> 
> Thanks for any suggestions or ideas,
> Daryl
> <CS210-Midkiffsm.jpg>
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