I have a Growatt MIN 11400, although this question may apply to any inverter with ACFI. Now that all my panels are installed in their permanent location, I rearranged the string wiring layout. I have 4 strings. The next day I got an AFCI fault, then again the following day.
What would be a likely cause? I'm thinking loose MC4 connection at one of the panels since that's the only thing that's changed. There was slight rain during the changeover, so there may be some moisture inside the connectors, but it has been sunny and the outside of the connectors are dry and they are not close to each other or ground.
What else might cause an AFCI fault? What would be the best way to trouble shoot?
What would be a likely cause? I'm thinking loose MC4 connection at one of the panels since that's the only thing that's changed. There was slight rain during the changeover, so there may be some moisture inside the connectors, but it has been sunny and the outside of the connectors are dry and they are not close to each other or ground.
What else might cause an AFCI fault? What would be the best way to trouble shoot?