Hi Mac, 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.
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. 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. Cheers, Dave On Sat, Dec 18, 2021, 4:15 PM Jason Szumlanski < ja...@floridasolardesigngroup.com> wrote: > I haven't seen many, but every one I've seen has been a melted MC4 > connector. > > Jason Szumlanski > Florida Solar Design Group > > On Sat, Dec 18, 2021, 3:21 PM Jerry Shafer <jerrysgarag...@gmail.com> > wrote: > >> 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. >> Jerry >> NABCEP PV Inspestor >> >> On Sat, Dec 18, 2021, 6:07 AM Mac Lewis <maclew...@gmail.com> wrote: >> >>> Hi Wrenches, >>> >>> 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. >>> >>> 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? >>> >>> Thanks >>> >>> -- >>> >>> >>> >>> Mac Lewis >>> >>> *"Yo solo sé que no sé nada." -Sócrates* >>> _______________________________________________ >>> List sponsored by Redwood Alliance >>> >>> Pay optional member dues here: http://re-wrenches.org >>> >>> List Address: RE-wrenches@lists.re-wrenches.org >>> >>> Change listserver email address & settings: >>> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >>> >>> There are two list archives for searching. When one doesn't work, try >>> the other: >>> https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/ >>> http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org >>> >>> List rules & etiquette: >>> http://www.re-wrenches.org/etiquette.htm >>> >>> Check out or update participant bios: >>> http://www.members.re-wrenches.org >>> >>> _______________________________________________ >> List sponsored by Redwood Alliance >> >> Pay optional member dues here: http://re-wrenches.org >> >> List Address: RE-wrenches@lists.re-wrenches.org >> >> Change listserver email address & settings: >> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >> >> There are two list archives for searching. When one doesn't work, try the >> other: >> https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/ >> http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org >> >> List rules & etiquette: >> http://www.re-wrenches.org/etiquette.htm >> >> Check out or update participant bios: >> http://www.members.re-wrenches.org >> >> _______________________________________________ > List sponsored by Redwood Alliance > > Pay optional member dues here: http://re-wrenches.org > > List Address: RE-wrenches@lists.re-wrenches.org > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > There are two list archives for searching. When one doesn't work, try the > other: > https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/ > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > > List rules & etiquette: > http://www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > http://www.members.re-wrenches.org > >
_______________________________________________ List sponsored by Redwood Alliance Pay optional member dues here: http://re-wrenches.org List Address: RE-wrenches@lists.re-wrenches.org Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org There are two list archives for searching. When one doesn't work, try the other: https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/ http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: http://www.re-wrenches.org/etiquette.htm Check out or update participant bios: http://www.members.re-wrenches.org
