<div dir="auto">I would think that if there is an internet connection that a call to tech support would make things quicker, since they have access to internal error codes which usually give a pretty good indication of what the problem is, or at least usually help direct where your troubleshooting efforts are best directed...<br><br><div data-smartmail="gmail_signature">Howie Michaelson<br>Sun Catcher<br>NABCEP Certified Solar PV Installer\u2122<br>Solar Electric & Heat Pumps Systems Sales & Service<br>802-272-0004</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, Nov 1, 2021, 6:50 PM Dave Tedeyan <<a href="mailto:dave@sungineersolar.com">dave@sungineersolar.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="auto"><div>The fuses are Ferraz Shawmut Trionic TR60R. 60A, 250V. I looked them up to find that they are time delay, RK5 type. </div><div dir="auto"><br></div><div dir="auto">I would imagine that there is monitoring, but not being my installation, I don't have access to it. That's a good idea though to get access to see when this is happening.</div><div dir="auto"><br></div><div dir="auto">I am also waiting to hear back as to whether it is both legs, or only one. I've been to the site only once so far, to initially diagnose the bad fuse. At the time, I was hoping that it was just a bad fuse since everything else looked okay.</div><div dir="auto"><br></div><div dir="auto">Lloyd, thanks for the insulation tip. Next time I head out there, I should pull out the wires and take a closer look. Unfortunately it's a line side tap, so I'm not excited about removing the tap, but may be worth it if I can't find anything else. Although come to think of it, I did find a ground fault in the wires for another system at the same site, so the original installers' wire pulling technique is certainly suspect.</div><div dir="auto"><br></div><div dir="auto">Cheers,</div><div dir="auto">Dave<br><br><div class="gmail_quote" dir="auto"><div dir="ltr" class="gmail_attr">On Mon, Nov 1, 2021, 6:05 PM Jerry Shafer <<a href="mailto:jerrysgarage01@gmail.com" target="_blank" rel="noreferrer">jerrysgarage01@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="auto">Does this system have monitoring, what time of day is this happening, the monitoring site should show output at time of failure, what leg is tripping both or one side? You may want to look at the fuses they are using, rapid blow, slow blow, rated for the duty these are being used for. You can also use a data logger to get a better idea of what and when<div dir="auto"><br><div dir="auto">Jerry</div></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, Nov 1, 2021, 1:45 PM Lloyd Hoffstatter <<a href="mailto:lloyd@sunstruckconsulting.com" rel="noreferrer noreferrer" target="_blank">lloyd@sunstruckconsulting.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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<p class="MsoNormal">Dave,</p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">My first thought would be a small nick in wire insulation going to ground, causing the fuse to fail over time.</p>
<p class="MsoNormal">We had a similar situation with a much larger system where the culprit was hard to notice\u2026</p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">Best regards,</p>
<p class="MsoNormal">Lloyd</p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">Lloyd Hoffstatter</p>
<p class="MsoNormal">Sunstruck Consulting</p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">Sent from <a href="https://go.microsoft.com/fwlink/?LinkId=550986" rel="noreferrer noreferrer noreferrer" target="_blank">
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<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal" style="border:none;padding:0in"><b>From: </b><a href="mailto:dave@sungineersolar.com" rel="noreferrer noreferrer noreferrer" target="_blank">Dave Tedeyan</a><br>
<b>Sent: </b>Monday, November 1, 2021 4:26 PM<br>
<b>To: </b><a href="mailto:re-wrenches@lists.re-wrenches.org" rel="noreferrer noreferrer noreferrer" target="_blank">RE-wrenches</a><br>
<b>Subject: </b>[RE-wrenches] SolarEdge inverter blowing fuses</p>
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<p class="MsoNormal">Hi All,<u></u><u></u></p>
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<p class="MsoNormal">I am servicing a system that keeps blowing fuses on the AC side, although it<u></u><u></u></p>
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<p class="MsoNormal"> appears that everything is sized correctly. It is a SolarEdge SE11400A-US inverter.<u></u><u></u></p>
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<p class="MsoNormal"> Max continuous output current is 47.5A x 1.25 = 59.4A. There is a GE TG3222R<u></u><u></u></p>
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<p class="MsoNormal"> 60A AC disconnect, and it is wired up with #6 THHN wire. The terminals were tight<u></u><u></u></p>
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<p class="MsoNormal"> and there was no evidence of arcing or burning in the past. This is indoors, and not<u></u><u></u></p>
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<p class="MsoNormal"> exposed to sunlight. No extra conductors are in the conduit.<u></u><u></u></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal">But they say that they need to replace a fuse roughly once per month. Has anyone<u></u><u></u></p>
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<p class="MsoNormal"> seen this before? Could there be some kind of fault in the inverter itself that<u></u><u></u></p>
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<p class="MsoNormal"> occasionally induces extra current? Is there any way to tweak the settings so that it<u></u><u></u></p>
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<p class="MsoNormal"> actually produces a bit more than 11.4kw? I appreciate your thoughts.<u></u><u></u></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal">Cheers,<u></u><u></u></p>
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<p class="MsoNormal">Dave<br clear="all">
<u></u><u></u></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal">-- <u></u><u></u></p>
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<p class="MsoNormal"><a href="https://www.sungineersolar.com/" rel="noreferrer noreferrer noreferrer" target="_blank"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#337ab7;text-decoration:none"><img border="0" width="105" height="103" style="width:1.0916in;height:1.075in" id="m_-8026548493947669738m_-8043050400055745145m_9031545640300701482_x0000_i1025" src="https://sungineersolar.com/wp-content/uploads/2019/08/Logo-Image-Only-1.png" alt="Logo"></span></a><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#444444"><u></u><u></u></span></p>
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<p class="MsoNormal"><b><span style="font-family:"Arial",sans-serif;color:#ecbd00">Dave Tedeyan, P.E.<br>
Owner | Sungineer Solar</span></b><span style="font-family:"Arial",sans-serif"><u></u><u></u></span></p>
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<p class="MsoNormal" style="line-height:12.75pt"><b><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#ecbd00">p: </span></b><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">he | him | his</span><b><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#ecbd00"><br>
a: </span></b><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">1653 Slaterville Rd.</span><span style="font-size:10.0pt;font-family:"Arial",sans-serif"> <span style="color:black">| Ithaca, NY 14850</span><br>
<b><span style="color:#ecbd00">w:</span></b><a href="http://www.sungineersolar.com/" rel="noreferrer noreferrer noreferrer" target="_blank"><span style="color:black"> www.sungineersolar.com</span></a><br>
<b><span style="color:#ecbd00">c:</span></b><span style="color:black"> (607) 288-2898</span><u></u><u></u></span></p>
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