<div dir="auto"><div>Hi Mac,</div><div dir="auto"><br></div><div dir="auto">Might I ask what modules these are connected to? There is some history here with Sunpower modules (and possibly other high power, high voltage modules). In these cases the issue is the module. If that's the case I can provide some more detail about it.</div><div dir="auto"><br></div><div dir="auto">As for remote resetting, it is actually possible. Although it takes some networking knowhow that I am not savvy enough to tell you the specifics. I believe it is possible to remotely access the inverter through some kind of port forwarding. So you can always reset the inverter by physically being there and doing the right power cycle and taps (depending on the inverter model), but you can also reset the arc fault through the computer (or smart phone) inverter interface.</div><div dir="auto"><br></div><div dir="auto">There is also one other thing you can try if there is no shading. At least with the Sunpower module issue, the inverter would always trip when it does an MPPT sweep. With the optitrac global peak that the sma inverters use, they do a full MPPT sweep every 6 to 30 minutes. You can turn this off, and sometimes that will stop the arc faults. But that also means that partial shading can take out a whole string, rather than just a modules worth of voltage.</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 Sat, Dec 18, 2021, 4:15 PM Jason Szumlanski <<a href="mailto:jason@floridasolardesigngroup.com">jason@floridasolardesigngroup.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">I haven't seen many, but every one I've seen has been a melted MC4 connector. <div dir="auto"><br></div><div dir="auto">Jason Szumlanski</div><div dir="auto">Florida Solar Design Group</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sat, Dec 18, 2021, 3:21 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">Over the years every SMA arcfault has been real, l am also not saying hazard, well, AC, welding, all creat Arc noise in the system and it can be from a normal contactor arc. I have also seen AM arc faults caused by defective or knock off MC connectors, in adequately stripped wires that result in the screw down connection on the insulator causing arc in the connector. <div dir="auto">Jerry</div><div dir="auto">NABCEP PV Inspestor</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sat, Dec 18, 2021, 6:07 AM Mac Lewis <<a href="mailto:maclewis1@gmail.com" rel="noreferrer noreferrer" target="_blank">maclewis1@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="ltr">Hi Wrenches,<div><br></div><div>I have spent this last week clearing arc faults on SMA inverters. There never appears to be a true arc event, just the occasional event and then lockout. </div><div><br></div><div>What is the best approach to fix these tripping inverter issues? Is there a way to decrease the sensitivity? Any procedures that are effective at keeping this from happening? All connections are good and tight and triple checked. Anyway to remotely clear these faults?</div><div><br></div><div>Thanks<br clear="all"><div><br></div>-- <br><div dir="ltr" data-smartmail="gmail_signature"><div><br></div><div><font color="#305A78" face="'times new roman', serif"><br></font></div><div><br></div>Mac Lewis<br><br><span style="font-family:'Times New Roman';font-size:medium;color:rgb(255,153,0)"><b><font face="Arial, Helvetica, sans-serif" size="3"><p align="left"><font color="#000000" face="Verdana, Arial, Helvetica, sans-serif"><span style="font-size:small"><span style="font-family:arial;font-weight:normal;color:rgb(48,90,120)"><font face="'times new roman', serif">"Yo solo sé que no sé nada." </font><span style="font-weight:700;color:rgb(104,104,104)"><font face="'times new roman', serif">-Sócrates</font></span></span></span></font></p></font></b></span></div></div></div>
_______________________________________________<br>
List sponsored by Redwood Alliance<br>
<br>
Pay optional member dues here: <a href="http://re-wrenches.org" rel="noreferrer noreferrer noreferrer noreferrer" target="_blank">http://re-wrenches.org</a><br>
<br>
List Address: <a href="mailto:RE-wrenches@lists.re-wrenches.org" rel="noreferrer noreferrer noreferrer" target="_blank">RE-wrenches@lists.re-wrenches.org</a><br>
<br>
Change listserver email address & settings:<br>
<a href="http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org" rel="noreferrer noreferrer noreferrer noreferrer" target="_blank">http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org</a><br>
<br>
There are two list archives for searching. When one doesn't work, try the other:<br>
<a href="https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/" rel="noreferrer noreferrer noreferrer noreferrer" target="_blank">https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/</a><br>
<a href="http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org" rel="noreferrer noreferrer noreferrer noreferrer" target="_blank">http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org</a><br>
<br>
List rules & etiquette:<br>
<a href="http://www.re-wrenches.org/etiquette.htm" rel="noreferrer noreferrer noreferrer noreferrer" target="_blank">http://www.re-wrenches.org/etiquette.htm</a><br>
<br>
Check out or update participant bios:<br>
<a href="http://www.members.re-wrenches.org" rel="noreferrer noreferrer noreferrer noreferrer" target="_blank">http://www.members.re-wrenches.org</a><br>
<br>
</blockquote></div>
_______________________________________________<br>
List sponsored by Redwood Alliance<br>
<br>
Pay optional member dues here: <a href="http://re-wrenches.org" rel="noreferrer noreferrer noreferrer" target="_blank">http://re-wrenches.org</a><br>
<br>
List Address: <a href="mailto:RE-wrenches@lists.re-wrenches.org" rel="noreferrer noreferrer" target="_blank">RE-wrenches@lists.re-wrenches.org</a><br>
<br>
Change listserver email address & settings:<br>
<a href="http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org" rel="noreferrer noreferrer noreferrer" target="_blank">http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org</a><br>
<br>
There are two list archives for searching. When one doesn't work, try the other:<br>
<a href="https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/" rel="noreferrer noreferrer noreferrer" target="_blank">https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/</a><br>
<a href="http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org" rel="noreferrer noreferrer noreferrer" target="_blank">http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org</a><br>
<br>
List rules & etiquette:<br>
<a href="http://www.re-wrenches.org/etiquette.htm" rel="noreferrer noreferrer noreferrer" target="_blank">http://www.re-wrenches.org/etiquette.htm</a><br>
<br>
Check out or update participant bios:<br>
<a href="http://www.members.re-wrenches.org" rel="noreferrer noreferrer noreferrer" target="_blank">http://www.members.re-wrenches.org</a><br>
<br>
</blockquote></div>
_______________________________________________<br>
List sponsored by Redwood Alliance<br>
<br>
Pay optional member dues here: <a href="http://re-wrenches.org" rel="noreferrer noreferrer" target="_blank">http://re-wrenches.org</a><br>
<br>
List Address: <a href="mailto:RE-wrenches@lists.re-wrenches.org" target="_blank" rel="noreferrer">RE-wrenches@lists.re-wrenches.org</a><br>
<br>
Change listserver email address & settings:<br>
<a href="http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org" rel="noreferrer noreferrer" target="_blank">http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org</a><br>
<br>
There are two list archives for searching. When one doesn't work, try the other:<br>
<a href="https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/" rel="noreferrer noreferrer" target="_blank">https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/</a><br>
<a href="http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org" rel="noreferrer noreferrer" target="_blank">http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org</a><br>
<br>
List rules & etiquette:<br>
<a href="http://www.re-wrenches.org/etiquette.htm" rel="noreferrer noreferrer" target="_blank">http://www.re-wrenches.org/etiquette.htm</a><br>
<br>
Check out or update participant bios:<br>
<a href="http://www.members.re-wrenches.org" rel="noreferrer noreferrer" target="_blank">http://www.members.re-wrenches.org</a><br>
<br>
</blockquote></div></div></div>