[Vfontan]

I am looking into hardwired surge protectors.

This situation had me thinking hard. I took the inverter to get tested and after two days, the techs just couldn't make it fail. The "Unknown Fault" returned shortly after re-installing the inverter. I ran the generator for about four hours with no issues and that had me thinking maybe it had to be a shore power issue or at least before the inverter, but I trusted the stupid surge protector LED (it bothers me that the surge protector never showed a fault light/code) and moved on to check the ATS and breakers, all seemed fine. Thought about bypassing the ATS but decided to just plug into the 30A outlet first to see if the problem persisted and that is when I discovered the damaged surge protector. Very annoying, but all is good now.