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: (607) 277-1118 x121 www.taitem.com
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