<div dir="ltr">Jason - I'm curious about your statement on cutting off module connectors. Can you elaborate?<div><br></div><div>Best,</div><div><br></div><div>August</div><div>Luminalt<br><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sat, Sep 7, 2019 at 7:52 AM Jason Fisher (STC) <<a href="mailto:stc.jason@gmail.com">stc.jason@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
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<div style="direction:ltr">Kent, I don\u2019t see an answer to Brian\u2019s question about the LG module\u2019s original connector configuration. We\u2019re these modules actually factory shipped with one H4 and one MC4 connector on different polarities? That would be bizarre. </div>
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<div style="direction:ltr">Otherwise to back up Brian\u2019s 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\u2019s
mating connectors. Bottom line is don\u2019t connect \u201cmismatched\u201d 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\u2019t therefore be \u201cmismatched\u201d). </div>
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<div style="direction:ltr">This is a very important issue so my advice to Wrenches is to keep firm and don\u2019t budge on this one. </div>
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<div style="direction:ltr">Also curious if you all still think you can\u2019t cut off module connectors? We need to correct that if so. </div>
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<div style="direction:ltr">Jason Fisher</div>
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<div id="gmail-m_7138129606260105297divRplyFwdMsg" dir="dir="ltr""><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> RE-wrenches <<a href="mailto:re-wrenches-bounces@lists.re-wrenches.org" target="_blank">re-wrenches-bounces@lists.re-wrenches.org</a>> on behalf of Jerry Shafer <<a href="mailto:jerrysgarage01@gmail.com" target="_blank">jerrysgarage01@gmail.com</a>><br>
<b>Sent:</b> Thursday, September 5, 2019 11:25 AM<br>
<b>To:</b> RE-wrenches<br>
<b>Subject:</b> Re: [RE-wrenches] connector mismatch
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<div dir="auto">Brian
<div dir="auto">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 </div>
<div dir="auto">Jerry</div>
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<div dir="ltr" class="gmail_attr">On Thu, Sep 5, 2019, 1:41 AM Brian Mehalic <<a href="mailto:brian@solarenergy.org" rel="noreferrer noreferrer" target="_blank">brian@solarenergy.org</a>> wrote:<br>
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<div dir="auto">I don\u2019t think \u201csome white paper\u201d is sufficient based on Code requirements, UL standards (6703), and verified field failures. Also see 2020 NEC® 690.33(C) - now requiring intermatability. <br>
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Brian</div>
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On Sep 4, 2019, at 2:06 PM, Jerry Shafer <<a href="mailto:jerrysgarage01@gmail.com" rel="noreferrer noreferrer noreferrer" target="_blank">jerrysgarage01@gmail.com</a>> wrote:<br>
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<div dir="auto">Wrenches
<div dir="auto">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.</div>
<div dir="auto">Jerry</div>
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<div dir="ltr" class="gmail_attr">On Wed, Sep 4, 2019, 1:42 PM Brian Mehalic <<a href="mailto:brian@solarenergy.org" rel="noreferrer noreferrer noreferrer noreferrer" target="_blank">brian@solarenergy.org</a>> wrote:<br>
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<div dir="ltr">Are you saying each module has, for example, a positive factory H4 lead and a negative factory MC4 lead?
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<div>I definitely know of H4 problems, both mated with H4s and mismatched. <br clear="all">
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<div>Brian Mehalic <br>
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<div dir="ltr" class="gmail_attr">On Wed, Sep 4, 2019 at 1:22 PM Kent Osterberg <<a href="mailto:kent@coveoregon.com" rel="noreferrer noreferrer noreferrer noreferrer noreferrer" target="_blank">kent@coveoregon.com</a>> wrote:<br>
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I've recently been looking for the cause of random power drop offs to <br>
zero in an Enphase M215 system with LG260 PV module that was installed <br>
in 2013. Just one inverter in a system of fourteen has been doing this. <br>
Enphase suggested moving the inverter to a different PV module and sure <br>
enough doing that proved the problem wasn't with the inverter. <br>
Intermittent zero output was being caused by the PV module. In making <br>
the inverter/module change I found that all the LG 260 modules in this <br>
system have one MC4 connector and one H4 connector. At present I'm <br>
convinced the mismatched connector is the actual cause of the problem. <br>
Anyone else ever notice find PV modules with mixed MC4 and H4 connectors?<br>
<br>
Kent Osterberg<br>
Blue Mountain Solar<br>
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