[RE-wrenches] Trina Module Annual Degradation

Jerry Shafer jerrysgarage01 at gmail.com
Fri Jul 17 10:42:40 PDT 2015


I completely agree with you and the "snail trails" will effect the
performance sooner then later, and the manufactures a kicking the can down
the road. We are also a small scale 42 watt to 110 watt module manufacture
and cracks are something we avoid at all costs.
Jerry

On Fri, Jul 17, 2015 at 5:07 AM, Bill Hoffer <sunengser at gmail.com> wrote:

> Jerry
>
> Unfortunately snail trails are a clear indication of micro cracks that
> will in time open up and degrade the output of the module substantially.
> They may not have a performance problem yet , but give it time to show up!
> It usually takes awhile for the snail trail to appear, the micro cracks
> allow ions to pass through the cell attracted by the polarity and cause the
> discoloration around the micro cracks.  I have heard of initial installs
> with them , which is a very bad sign, and the same response from the
> manufacturer that it does not effect performance ( yes they were flash
> tested with the micro cracks present).  IMHO it is a manufacturing defect
> and has nothing to do with performance....yet, and should be covered under
> manufacturing defects!  Good luck with that though!  I am sure that we have
> had this problem all along, but because we are seeing 1000 vdc
> transformer-less systems it is occurring more quickly.
>
> Bill Hoffer
>
> On Thu, Jul 16, 2015 at 10:33 PM, jerrysgarage01 <jerrysgarage01 at gmail.com
> > wrote:
>
>> Wrenches
>> We used to use Sharp but now its Trina,  containers of 250 watt modules,
>>  data logging has not shown any abnormal power loss. Now that I say this
>> Trina as the story  goes debates there data so that is true it softens the
>> blow a little. I have seen  some another brand that are cracking poly cells
>> looks like snail tracks, manufacture says it does not effect performance
>> Jerry
>>
>>
>> Sent via the Samsung Galaxy S™ III, an AT&T 4G LTE smartphone
>>
>>
>> -------- Original message --------
>> From: boB at midnitesolar.com
>> Date:07/16/2015 4:01 PM (GMT-10:00)
>> To: RE-wrenches
>> Subject: Re: [RE-wrenches] Trina Module Annual Degradation
>>
>>
>>
>> It's too bad that when a module goes to a REAL high degradation, like,
>> 100% down to nothing
>> before that 25 year "warranty" is up, that it is NOT considered
>> degradation and is not covered
>> under "warranty".
>>
>> P.S. This has nothing to do with Trina or any PV company in particular.
>>
>> boB
>>
>> On 7/16/2015 6:24 PM, jay wrote:
>> > HI Peter,
>> >
>> > I’ll bite.
>> >
>> >  From the folks I know who deal with multi mega watt systems, are
>> seeing less than  that level of degradation.
>> >
>> > That said, the standard module  25 yr warranty to 80% is just on .7%
>> year if I have my math correct.
>> >
>> > jay
>> >
>> > peltz power
>> >
>> >
>> >
>> >
>> >> On Jul 16, 2015, at 9:08 AM, Peter Parrish <
>> peter.parrish at calsolareng.com> wrote:
>> >>
>> >> I have recently been in discussion with a company that builds a large
>> number
>> >> of medium-sized PV ground mount system (30 kW to over 100 kW). They
>> claim
>> >> that they have been seeing something on the order of 0.7% annual
>> degradation
>> >> in the output of their systems due to intrinsic degradation in the PV
>> >> modules. They also claim that this number is supported by the PV module
>> >> manufacturer. Many years ago (2007?) I remember reading a report
>> containing
>> >> data gathered by NREL that showed the number was about 0.4%, and I
>> thought
>> >> the number was actually decreasing over time.
>> >>
>> >> The module in question is the Trina TSM-310 (PA14.8, I believe, if it
>> makes
>> >> any difference).
>> >>
>> >> Has anyone read anything recent about annual degradation in general or
>> Trina
>> >> modules in particular?
>> >>
>> >> - Peter
>> >>
>> >> Peter T. Parrish, Ph.D.
>> >> President, SolarGnosis
>> >> 1107 Fair Oaks Ave. Suite 351
>> >> South Pasadena, CA 91030
>> >> NABCEP Certified PV Installer #031806-26
>> >> (323) 839-6108
>> >> petertor at pobox.com
>> >>
>> >>
>>
>> _______________________________________________
>> List sponsored by Redwood Alliance
>>
>> List Address: RE-wrenches at lists.re-wrenches.org
>>
>> Change listserver email address & settings:
>> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
>>
>> List-Archive:
>> http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html
>>
>> List rules & etiquette:
>> www.re-wrenches.org/etiquette.htm
>>
>> Check out or update participant bios:
>> www.members.re-wrenches.org
>>
>>
>> _______________________________________________
>> List sponsored by Redwood Alliance
>>
>> List Address: RE-wrenches at lists.re-wrenches.org
>>
>> Change listserver email address & settings:
>> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
>>
>> List-Archive:
>> http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html
>>
>> List rules & etiquette:
>> www.re-wrenches.org/etiquette.htm
>>
>> Check out or update participant bios:
>> www.members.re-wrenches.org
>>
>>
>>
>
>
> --
> William Hoffer
> 161 SE Fourth Ave
> P.O. Box 1823
> White Salmon, WA 98672-1823
> sunengser at gmail.com <bhoffer at sunergyengineeringservices.com>
>
>
> _______________________________________________
> List sponsored by Redwood Alliance
>
> List Address: RE-wrenches at lists.re-wrenches.org
>
> Change listserver email address & settings:
> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
>
> List-Archive:
> http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html
>
> List rules & etiquette:
> www.re-wrenches.org/etiquette.htm
>
> Check out or update participant bios:
> www.members.re-wrenches.org
>
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org/attachments/20150717/90ff6469/attachment-0002.html>


More information about the RE-wrenches mailing list