I don’t think “some white paper” is sufficient based on Code requirements, UL standards (6703), and verified field failures. Also see 2020 NEC® 690.33(C) - now requiring intermatability.
Brian > On Sep 4, 2019, at 2:06 PM, Jerry Shafer <jerrysgarag...@gmail.com> wrote: > > Wrenches > Per some white papers connectors are interchangeable, this being said l have > had arc issues as a result. FYI there are knock-offs out there to. > Jerry > >> On Wed, Sep 4, 2019, 1:42 PM Brian Mehalic <br...@solarenergy.org> wrote: >> Are you saying each module has, for example, a positive factory H4 lead and >> a negative factory MC4 lead? >> >> I definitely know of H4 problems, both mated with H4s and mismatched. >> >> Brian Mehalic >> NABCEP Certified Solar PV Installation Professional™ R031508-59 >> National Electrical Code® CMP-4 Member >> (520) 204-6639 >> >> Solar Energy International >> http://www.solarenergy.org >> >> SEI Professional Services >> http://www.seisolarpros.com >> >> >> >>> On Wed, Sep 4, 2019 at 1:22 PM Kent Osterberg <k...@coveoregon.com> wrote: >>> I've recently been looking for the cause of random power drop offs to >>> zero in an Enphase M215 system with LG260 PV module that was installed >>> in 2013. Just one inverter in a system of fourteen has been doing this. >>> Enphase suggested moving the inverter to a different PV module and sure >>> enough doing that proved the problem wasn't with the inverter. >>> Intermittent zero output was being caused by the PV module. In making >>> the inverter/module change I found that all the LG 260 modules in this >>> system have one MC4 connector and one H4 connector. At present I'm >>> convinced the mismatched connector is the actual cause of the problem. >>> Anyone else ever notice find PV modules with mixed MC4 and H4 connectors? >>> >>> Kent Osterberg >>> Blue Mountain Solar >>> _______________________________________________ >>> 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 >> > _______________________________________________ > 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 >
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