Hi Jerry I’m not sure I understand. Are you saying that the white paper overrules ( if that’s the correct way to say it) the UL and OEM guidelines?
Jay > On Sep 5, 2019, at 8:25 AM, Jerry Shafer <jerrysgarag...@gmail.com> wrote: > > 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 >
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