We had that issue once. It was after a night of heavy rainfall and the error only read for the first few early hours of the day. SMA told us it was a poor connection in an MC4 connector that most likely got some dampness in it...
Adam Katzman Autonomous Energies PO Box 1245 Kingston, NY 12402 www.autonomousenergies.com (518) 567-1468 On Wed, Mar 23, 2016 at 5:16 PM, August Goers <[email protected]> wrote: > Hi Drake, > > > > What model SMA inverter(s) and modules do you have? We had one case where > a MC4 connector under the array was not making good contact. It was not > seated properly when the installer made up the connector and the arc fault > sensor in the inverter did its job. We had another site where some > electrical noise on the AC side, presumably a sump pump, caused the issue > and we could not solve it so had to switch to another inverter > manufacturer. There were other cases where the impedance or other > electrical characteristics of the solar modules where the likely culprit. > > > > Is your roof and array totally equipment grounded? > > > > Best, > > > > August > > > > *From:* RE-wrenches [mailto:[email protected]] *On > Behalf Of *Drake > *Sent:* Wednesday, March 23, 2016 2:08 PM > *To:* [email protected] > *Subject:* [RE-wrenches] AFCI trip on metal roof > > > > Hello Wrenches, > > We have a project with an array on a large metal roof. The AFCI has been > tripping. Investigating the system, there is no evidence of any arcing: the > wiring and connections are all very tight. > > SMA tech support says it is likely that the nuisance tripping comes from > electrical noise getting picked up by the large metal roof. > > What has been your overall experience with nuisance tripping of arc fault > protection? What were the suspected causes? What was the solution? > > Thanks, > > Drake > > Drake Chamberlin > > > > > > *Athens Electric LLCOH License 44810CO License 3773NABCEP Certified Solar > PV 740-448-7328 <740-448-7328>*http://athens-electric.com/ > > > <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient&utm_term=oa-2115-v2-c> > > No threats detected. www.avast.com > <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient&utm_term=oa-2115-v2-c> > > > > _______________________________________________ > List sponsored by Redwood Alliance > > List Address: [email protected] > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://www.mail-archive.com/[email protected]/maillist.html > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > www.members.re-wrenches.org > > >
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