Isolation Fault - SolarEdge SE330K Installation Manual

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4. Use a method independent of the SolarEdge device to check whether the network

and modem are operating properly. For example, connect a laptop to the Ethernet

router and connect to the Internet.

5. Check whether a firewall or another type of network filter is blocking

communication.

Isolation Fault

In photovoltaic systems with a transformer-less inverter, the DC is isolated from ground.

PV modules with defective isolation, unshielded wires, defective power optimizers, or a

faulty inverter, can cause a leakage of DC current to the ground (PE - protective

earth). Such a fault is also called an isolation fault or ground fault.

To identify and locate an isolation fault in a PV system, refer to:

https://knowledge-center.solaredge.com/sites/kc/files/se-s330k-isolation-fault-

troubleshooting-application-note.pdf

SE330K Inverter P/N: SE330K-xxxxxxxxx

Appendix A: Errors and

Troubleshooting 78

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