A red sticker in the connection area of the inverter as well as the manual reads:
Do not invert neutral and phase when connecting the AC.
I wonder why this is important when connected in a single phase environment when PE is connected properly. This is alternating current, and the N and PE connections of AC-Out are only bridged after the mains is no longer available at AC-In.
Can someone please explain under which conditions it is important that N and L are not reversed, and what effects this can have?