The system is Fronius Primo, trip on fault code meaning ground fault in the array. I disconnect the arrays from the combiner it measures 400+ corresponding to Voc @ temp. My Fluke multimeter the same about 5 volts to ground off both ends of the disconnected array. When I connect the inverter and set into operation I measure a difference of voltage to ground. The tech support at Fronius says it can't be the inverter. Is the problem in the array? Or the inverter?
If I meg the array, my procedure is to open circuit the array and connect my negative lead to ground and my positive lead of the Megger. to the negative lead of the array. please comment on my megging practice.
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