How to troubleshoot photovoltaic panel grounding fault
Troubleshooting PV loadsMeasure voltage on the solar array at the combiner box, load switches, fuses and breakers to see if the proper voltage is present at the load’s connections.Check the fuses and circuit breakers. Check for and repair any ground faults. Check for broken wires and loose connections. .
Troubleshooting PV loadsMeasure voltage on the solar array at the combiner box, load switches, fuses and breakers to see if the proper voltage is present at the load’s connections.Check the fuses and circuit breakers. Check for and repair any ground faults. Check for broken wires and loose connections. .
Steps to help you troubleshoot ground faults:Visually inspect the inverter. If inverter correctly displays ground fault error, drain capacitors and remove GFDI FuseCheck to see if GFDI fuse has been blown, if so you will need to replace after clearing the faultRemove positive and negative from PV array and reconnect DC power to the capacitors.
If this fault is encountered, you need to check the insulation on DC/AC side. Damaged AC cables, or installation mistake low resistance between the phases and grounding.
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