I got it hooked up today, and with a load on it, the V between neutral and ground was 0, and between hot and ground was ~118 V. So I think with that, and all the other evidence above, we can safely say there is a permanent GN bond on this inverter.
I appreciate all the help provided here, even if it doesn't always seem like it (I think the problem is that I need to understand the reasons for certain suggestions or claims, and don't easily just take things at face value).
I am still confused about the exact function/purpose of the "chassis ground" terminal on the inverter, and how to wire this without creating a ground loop. I created a new post about that
over here.
