[RE-wrenches] Cell Cracks

[Andrew Truitt]

Spot-on Glenn.  Ray - check out this doc from REC
<http://aeesolar.com/wp-content/uploads/2017/01/2017DC-Microcracks-and-Solar-Modules.pdf>.
Its not uncommon for there to be no measurable effect from a microcrack at
first, but efficiency and safety can be significantly impacted after years
of thermal cycling.  Apparently the best way to detect them in the field is
electroluminescence testing.  Not particularly cost effective for one-off
resi, but for larger systems it could make sense to test a sample.  These
guys <http://www.acuitypower.com/>provide in-field EL testing services and
are rock stars.


*Regards, *

*Andrew Truitt | DRV <http://dr.ventures/>*
www.dr.ventures
d: 202.486.7507

NABCEP Certified PV Installation Professional ID: 032407-66
Colorado Journeyman Electrician License No.: 600132


On Tue, Aug 14, 2018 at 8:34 PM Ray <ray at solarray.com> wrote:

> I haven't seen the actual modules, and I am not that familiar with
> microfractures or snail trails either.
>
> Ray Walters
> Remote Solar
> 303 505-8760
>
> On 8/14/18 7:42 PM, glenn.burt at glbcc.com wrote:
>
> Ray,
>
> Do you feel that these are different from the microfractures or snail
> trails that were  reported widely across the industry a couple of years ago?
>
> Glenn
>
> Sent from my 'smart' phone so please excuse spelling and typos.
>
> ------ Original message------
> *From: *Ray
> *Date: *Tue, Aug 14, 2018 10:24 AM
> *To: *RE-wrenches;
> *Cc: *
> *Subject:*[RE-wrenches] Cell Cracks
>
> Hi All;
>
> I've had a colleague ask that I post a couple pictures of what appears
> to be cracks in cells under the glass.  The glass is not damaged.  These
> are Sun Edison modules, so apparently no warranty.  Has anyone seen
> this, and are these possibly dangerous (hot spots) or is this nothing to
> worry about?  An Infrared camera did not show any issues.
>
> As always your invaluable input is always appreciated.
>
> Thanks,
>
> --
> Ray Walters
> Remote Solar303 505-8760
>
>
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