<html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"></head><body ><div>Wrenches</div><div>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</div><div>Jerry</div><div><br></div><div><br></div><div><div style="font-size:9px;color:#575757">Sent via the Samsung Galaxy S™ III, an AT&T 4G LTE smartphone</div></div><br><br><div>-------- Original message --------</div><div>From: boB@midnitesolar.com </div><div>Date:07/16/2015 4:01 PM (GMT-10:00) </div><div>To: RE-wrenches <re-wrenches@lists.re-wrenches.org> </div><div>Subject: Re: [RE-wrenches] Trina Module Annual Degradation </div><div><br></div><br><br>It's too bad that when a module goes to a REAL high degradation, like, <br>100% down to nothing<br>before that 25 year "warranty" is up, that it is NOT considered <br>degradation and is not covered<br>under "warranty".<br><br>P.S. This has nothing to do with Trina or any PV company in particular.<br><br>boB<br><br>On 7/16/2015 6:24 PM, jay wrote:<br>> HI Peter,<br>><br>> I’ll bite.<br>><br>> From the folks I know who deal with multi mega watt systems, are seeing less than that level of degradation.<br>><br>> That said, the standard module 25 yr warranty to 80% is just on .7% year if I have my math correct.<br>><br>> jay<br>><br>> peltz power<br>><br>><br>><br>><br>>> On Jul 16, 2015, at 9:08 AM, Peter Parrish <peter.parrish@calsolareng.com> wrote:<br>>><br>>> I have recently been in discussion with a company that builds a large number<br>>> of medium-sized PV ground mount system (30 kW to over 100 kW). They claim<br>>> that they have been seeing something on the order of 0.7% annual degradation<br>>> in the output of their systems due to intrinsic degradation in the PV<br>>> modules. They also claim that this number is supported by the PV module<br>>> manufacturer. Many years ago (2007?) I remember reading a report containing<br>>> data gathered by NREL that showed the number was about 0.4%, and I thought<br>>> the number was actually decreasing over time.<br>>><br>>> The module in question is the Trina TSM-310 (PA14.8, I believe, if it makes<br>>> any difference).<br>>><br>>> Has anyone read anything recent about annual degradation in general or Trina<br>>> modules in particular?<br>>><br>>> - Peter<br>>><br>>> Peter T. Parrish, Ph.D.<br>>> President, SolarGnosis<br>>> 1107 Fair Oaks Ave. Suite 351<br>>> South Pasadena, CA 91030<br>>> NABCEP Certified PV Installer #031806-26<br>>> (323) 839-6108<br>>> petertor@pobox.com<br>>><br>>><br><br>_______________________________________________<br>List sponsored by Redwood Alliance<br><br>List Address: RE-wrenches@lists.re-wrenches.org<br><br>Change listserver email address & settings:<br>http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org<br><br>List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html<br><br>List rules & etiquette:<br>www.re-wrenches.org/etiquette.htm<br><br>Check out or update participant bios:<br>www.members.re-wrenches.org<br><br></body>