Interesting. I am at the point in the installation where I need your guys' help. I have the same breaker panel that Will uses in his video install and I have removed both bonding screws in the inverters as well. picture below. I notice that he has the green bonding screw installed and the grounds and neutrals tied together and his is not going to another panel or xfer switch, just outlets I believe. My setup is going out to a Generac panel with a built-in xfer switch, previously used for a generator.I have 2 hots and a neutral and ground going over to the xfer switch as it was wired for the generator at one time. Should I keep the small panel wired as is with the bonding screw and grounds and neutrals connected together or separate them and/ or remove the green bonding screw? From this panel, it goes to the large 200A home panel which has a built-in xfer switch. A link to the xfer switch panel, I don't think it's switching neutrals
https://www.electricgeneratorsdirect.com/manuals/5449manual.pdf
https://www.electricgeneratorsdirect.com/manuals/5449manual.pdf