A while back I had some issues with my solar array where a string would throw a ground fault on the inverter. It turned out Trina had made a faulty batch of panels where water would leak into the side of the frame. When it rained, the inverter would detect a ground fault.
So I built a calculator that lets me quickly identify one or more panels that are leaking.
String details
Calculated values
Vocp per panel—
V1 ÷ Vocp—
V2 ÷ Vocp—
V1 + V2—
Fault location
String map — positive end (left) to negative end (right)
Likely fault
Adjacent / suspect