Jason - I'm curious about your statement on cutting off module connectors. Can you elaborate?
Best, August Luminalt On Sat, Sep 7, 2019 at 7:52 AM Jason Fisher (STC) <stc.ja...@gmail.com> wrote: > Kent, I don’t see an answer to Brian’s question about the LG module’s > original connector configuration. We’re these modules actually factory > shipped with one H4 and one MC4 connector on different polarities? That > would be bizarre. > > Otherwise to back up Brian’s point about Intermatability, this is a UL > 6703 term that was added in NEC2020 to specifically address this question, > how can installers have confidence when they are asked to connect two > different manufacturer’s mating connectors. Bottom line is don’t connect > “mismatched” connectors, ever. Only connect different manufacturers, and/or > different models of mating connectors if at least one of the companies > produces proof of evaluation of that combination by an NRTL. Warning that > this is rare at this point (those wouldn’t therefore be “mismatched”). > > This is a very important issue so my advice to Wrenches is to keep firm > and don’t budge on this one. > > Also curious if you all still think you can’t cut off module connectors? > We need to correct that if so. > > Jason Fisher > ------------------------------ > *From:* RE-wrenches <re-wrenches-boun...@lists.re-wrenches.org> on behalf > of Jerry Shafer <jerrysgarag...@gmail.com> > *Sent:* Thursday, September 5, 2019 11:25 AM > *To:* RE-wrenches > *Subject:* Re: [RE-wrenches] connector mismatch > > Brian > Missing the point, yes they are compatible but as we have seen in the real > world there are issues. This can give module and micro inverter > manufacturers an out regarding failures and responsibility > Jerry > > On Thu, Sep 5, 2019, 1:41 AM Brian Mehalic <br...@solarenergy.org> wrote: > >> 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 >> >> _______________________________________________ >> 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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