Off Grid site installed in June 2021 has had two Error 42 Ground Fault events. One 2 months after install and one in the last 2 days. On detailed inspection with (full insulation resistance testing with a Mega tester Fluke etc) no faults could be found on array cables to earth, (and other cables that wouldnt be likely to cause issues). Has anyone else had this Error and could not locate cable faults etc? Or any other suggestions. All JA Solar panels, cables etc were brand new and have been visually checked for damage. No 4G coverage so system is not on VRM
Keen to hear thoughts.