OK I read thru this
very long website
link a few weeks ago when a thread was talking about installing a solar system. The author is an electrical engineer. And somewhere in there he mentions that the Feds mandated changes to inverters some time ago that prevented them from doing what you want to do. Ones made before then would work, newer ones won't.
I just quick scanned it and didn't see it. But since you are motivated more than I am, especially after eating turkey. You can read it and find the reference.