SS responded with the following information on removing the NG bond in the inverter to use the EG4 3000 EHV in off grid mode and connecting to my main panel when grid is down.
"If you move it to connect to that main panel with a N/G bond, you must remove that screw or have an electrician remove the N/G bond in the panel until you move it back to the original configuration where the inverter is connected to the sub panel."
So, I have confirmed that the EG4 3000 EHV comes with a NG bonding screw and that it is located where the picture shows it. It can, and should be, removed when used in off grid mode and connecting to a setup that already has a NG bond.
This, of course, assumes the guy that sent the email knows what he is talking about. Just wanted to share this in hopes of helping others with similar questions.
Why EG4 can't clearly state this on their website is very confusing.