<div dir="auto"><div>It's the disconnect. We had dozens of this subpar disconnect design fail on Enphase systems. The 2 Pole has the same issue.</div><div dir="auto"><br></div><div dir="auto">GE gave us some nonsense answer that it's General Duty and not designed for continuous high power. Even 40A combined Enphase systems will blow a 60A fuse. </div><div dir="auto"><br></div><div dir="auto">What you will find is the fuse will blow on one side and then replacements will blow at decreasing intervals until it blows daily. Our experience is the left side (of the 2-pole) is far more problematic for some odd reason. It's not the fuse brand either.</div><div dir="auto"><br></div><div dir="auto">I believe the design fault is how the blades only hit a single contact on one side when they close. The Square D alternative has the blade slipping between two contacts. </div><div dir="auto"><br></div><div dir="auto">Sadly we have had to replace so many of these and most are supply side interconnections, which make it tricky and expensive. </div><div dir="auto"><br></div><div dir="auto">Jason Szumlanski</div><div dir="auto">Florida Solar Design Group</div><div dir="auto"><br></div><div dir="auto"><br></div><div dir="auto"><br><br><div class="gmail_quote" dir="auto"><div dir="ltr" class="gmail_attr">On Mon, Nov 1, 2021, 4:26 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="ltr">Hi All,<div><br><div>I am servicing a system that keeps blowing fuses on the AC side, although it</div><div> appears that everything is sized correctly. It is a SolarEdge SE11400A-US inverter.</div><div> Max continuous output current is 47.5A x 1.25 = 59.4A. There is a GE TG3222R</div><div> 60A AC disconnect, and it is wired up with #6 THHN wire. The terminals were tight</div><div> and there was no evidence of arcing or burning in the past. This is indoors, and not</div><div> exposed to sunlight. No extra conductors are in the conduit.</div><div><br></div><div>But they say that they need to replace a fuse roughly once per month. Has anyone</div><div> seen this before? Could there be some kind of fault in the inverter itself that</div><div> occasionally induces extra current? Is there any way to tweak the settings so that it</div><div> actually produces a bit more than 11.4kw? I appreciate your thoughts.</div><div><br></div><div>Cheers,</div><div>Dave<br clear="all"><div><br></div>-- <br><div dir="ltr" data-smartmail="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div dir="ltr"></div></div></div></div><div dir="ltr"><table cellpadding="0" cellspacing="0" style="border-spacing:0px;border-collapse:collapse;color:rgb(68,68,68);width:525px;font-size:11pt;font-family:Arial,sans-serif"><tbody><tr><td width="125" valign="top" rowspan="6" style="font-family:Arial,sans-serif;padding:0px 10px 0px 0px;font-size:10pt;border-right:1px solid rgb(236,189,0);width:125px;vertical-align:top"><a href="https://www.sungineersolar.com/" style="color:rgb(51,122,183);background-color:transparent" target="_blank" rel="noreferrer"><img border="0" alt="Logo" width="105" src="https://sungineersolar.com/wp-content/uploads/2019/08/Logo-Image-Only-1.png" style="border:0px;vertical-align:middle;width:105px;height:auto"></a></td><td style="padding:0px 0px 0px 10px"><table cellpadding="0" cellspacing="0" style="border-spacing:0px;border-collapse:collapse;background-color:transparent"><tbody><tr><td valign="top" style="font-family:Arial,sans-serif;padding:0px 0px 5px 10px;width:400px;vertical-align:top"><span style="color:rgb(236,189,0);font-size:11pt;font-weight:700">Dave Tedeyan, P.E.<br></span><span style="font-size:11pt;font-weight:700"><font color="#ecbd00">Owner | Sungineer Solar</font><br></span></td></tr><tr><td valign="top" style="font-family:Arial,sans-serif;padding:5px 0px 5px 10px;font-size:10pt;vertical-align:top;line-height:17px"><span style="color:rgb(236,189,0)"><span style="font-weight:700">p: </span></span><span style="font-size:13.3333px"><span style="font-size:10pt;color:rgb(0,0,0)">he | him | his</span></span><span style="color:rgb(236,189,0)"><span style="font-weight:700"><br>a: </span></span><span style="font-size:10pt;color:rgb(0,0,0)">1653 Slaterville Rd.</span> <span style="font-size:10pt;color:rgb(0,0,0)">| Ithaca, NY 14850</span><br><span style="color:rgb(236,189,0)"><span style="font-weight:700">w:</span></span><a href="http://www.sungineersolar.com/" rel="noopener noreferrer" style="color:rgb(51,122,183);background-color:transparent" target="_blank"><span style="font-size:10pt;color:rgb(0,0,0)"> www.sungineersolar.com</span></a><br><span style="color:rgb(236,189,0)"><span style="font-weight:700">c:</span></span><span style="font-size:10pt;color:rgb(0,0,0)"> (607) 288-2898</span></td></tr></tbody></table></td></tr></tbody></table></div></div></div></div></div></div></div>
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