Tom. I have said that I already have this schematic and I have looked at it a number of times over the past few days.
The inverter does have its own ground. That is the one that I moved to a new frame ground and now all is well.
Everything is running the way it is supposed to and I am leaving it at that, as the way I see it, the issue is resolved.
Thanks for your input. We are away from the coach for a number of days so I can't get any pictures.
Thanks again.