Hi Chris, There are a number of test methods, but the best two are. Electroluminescence imagining ELI thermal imaging IR
>From what I read at Photon, the ELI is the best for micro cracks before they >really happen. After they are visible, thermal imaging can be helpful. As to it being a real issue, I believe so. The cause has not been confirmed, but contributing factors are: cell thickness manufacturing handling shipping/packing field handling. For example I've seen IR photos that show a hand print damage in the middle of module. Or damage that sure looks like it would have been from a shoulder pressing on a cell area ( carrying it like a sheet of plywood). If you are looking for someone who can do these field tests, contact me off site, jay peltz power On Oct 4, 2014, at 10:46 AM, Christopher Warfel wrote: > No, this is a third party quality assurance inspector for a rate payer funded > program. The issue is most likely proper use of ratepayer funds towards these > projects. I would think that the AHJ wouldn't be concerned unless there was > a safety issue My question is more along the lines of: is this a real issue, > and if so, how does one see the defect? > On 10/4/2014 12:21 PM, jay peltz wrote: >> Hi Chris, >> >> Do you mean the AHJ? >> >> jay >> >> >> On Oct 4, 2014, at 8:20 AM, Christopher Warfel wrote: >> >>> Recently a inspector raised the issue of microfractures in pv modules, and >>> that the existence of such fractures would require replacement of the >>> modules and a failing of the system inspection. I found information from >>> NREL confirming the existence of microfractures in poly crystalline. >>> However, I have not seen any information on how to detect them (ie, what >>> they look like). Does anyone have a reference that shows this, and is this >>> a valid concern for the industry? Thank you, Chris >>> >>> >>> >>> >>> >>> >>> -- >>> Christopher Warfel, President >>> ENTECH Engineering, Inc. >>> PO Box 871, Block Island, RI 02807 >>> 401-466-8978 >>> >>> _______________________________________________ >>> 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 >> >> > > -- > Christopher Warfel, President > ENTECH Engineering, Inc. > PO Box 871, Block Island, RI 02807 > 401-466-8978 > > _______________________________________________ > 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
