The microinverter just turns itself off if it doesn’t detect line voltage in the outlet. In the U.S. evidently it’s required to also have some sort of backflow preventer in the panel as well.
Fair, I always forget that most inverters require an existing line voltage to follow instead of being able to generate their own ex nihilo. I was also picturing one of the battery banks that do have the ability to create their own signal too.
