Is your array on a large metal roof, or is it where intense radio signals could be getting picked up by your racking? Either of these conditions could potentially be your problem.
At 01:37 PM 11/10/2016, you wrote:
Daryl, That is what I thought at first. Very rare, but I suppose not impossible that I would have two inverters with bad arc fault detectors. But since we are still getting arc faults after replacing the inverters, I am thinking that it must be something else. Cheers, Dave -- Dave Tedeyan Project Engineer Taitem Engineering, PC 109 S. Albany Street, Ithaca, NY 14850 Voice: (607) 277-1118 x121 <http://www.taitem.com/>www.taitem.com On Thu, Nov 10, 2016 at 1:18 PM, <<mailto:penobscotso...@midmaine.com>penobscotso...@midmaine.com> wrote: There is at least one company (nameless at this point, but not SMA) that has been providing replacements for swapping out faulty arc fault detectors in their inverters. Could it be possible you have a bad detector? Daryl > Hi All, > > Maybe someone will have some ideas for why a couple inverters keep arc > faulting: > > -There are two SB7000TL-22 inverters, Sunpower branded. > -3 Strings of 7 SPR-327's to each inverter. Kept separate until the > inverter. > -Ground mount about 50' from the shed where the inverters are located > (indoors) > -Simple grid connected system, no batteries. > -There is a whole house generator co-located in the shed. > -We interconnect by using piercing taps on the line side of the generator > transfer switch > -There has been only one power outage there since the system was installed > in April, but the generator fires up weekly. > > -The arc faults have been happening on both inverters. Sometimes only one > at a time, sometimes both will go within a day of each other. > -The events have been approximately one a month, but sometimes more, > sometimes less. > > -We have already checked every single connection in the system twice, by > two different people. > -We have replaced the underground wires (and they looked just fine) > -We have replaced all home runs. > -We have replaced both inverters. > -Arc faults are still happening. > -Arc faults are not always on the same day/time of the week. > > I am wondering if this can be caused by the generator? > Has anyone run into a situation like this or something similar? > > Thanks for your help, > Dave > > *--* > > > *Dave Tedeyan* > *Project Engineer* > > *Taitem Engineering, PC* > 109 S. Albany Street, Ithaca, NY 14850 > Voice: <tel:%28607%29%20277-1118%20x121>(607) 277-1118 x121 > <http://www.taitem.com>www.taitem.com > _______________________________________________ > List sponsored by Redwood Alliance > > List Address: <mailto:RE-wrenches@lists.re-wrenches.org>RE-wrenches@lists.re-wrenches.org > > Change listserver email address & settings: > <http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org>http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > <http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html>http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html > > List rules & etiquette: > <http://www.re-wrenches.org/etiquette.htm>www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > <http://www.members.re-wrenches.org>www.members.re-wrenches.org > > _______________________________________________ List sponsored by Redwood Alliance List Address: <mailto:RE-wrenches@lists.re-wrenches.org>RE-wrenches@lists.re-wrenches.org Change listserver email address & settings: <http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org>http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: <http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html>http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html List rules & etiquette: <http://www.re-wrenches.org/etiquette.htm>www.re-wrenches.org/etiquette.htm Check out or update participant bios: <http://www.members.re-wrenches.org>www.members.re-wrenches.org _______________________________________________ List sponsored by Redwood Alliance 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 List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/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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