Leviton motion sensor switch not working with AC500 offgrid setup - ground problem

I have a tiny home trailer that has a Leviton motion sensor switch controlling lights and a fan. The trailer is powered by an AC500 inverter with batteries that are housed in a shed.

The problem is that when the motion sensor is activated, the lights and fan stay on forever instead of turning off after a set period of time.

The Leviton manual says that this happens when there is a bad ground.

I understand that the AC500 has a floating neutral/ground.

Would a neutral/ground bonding plug likely fix my problem?

@highcamp Yes, you can fix that by purchasing a grounding plug like this.

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