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.parr...@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 > peter...@pobox.com > > > > _______________________________________________ > List sponsored by Redwood Alliance > > List Address: RE-wrenches@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@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
