PV Maintenance Tests

A simple way to test current on each string with a multimeter is to put the multimeter in current mode (Probably the 10A scale) and put the probes on either end of one fuse at a time then pull the fuse while holding the probes across the fuse holder. This way the multimeter conducts the current of the string and you can see what each string is doing. Once you have a current reading, close the fuse before removing the multimeter. Not sure if there is a simple way to test for PV ground faults though, other than check for voltage between PV and ground (i.e. PV+ to ground and PV- to ground) and if there is nothing significant then you could maybe check resistance to ground as well.

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