I too do not understand the death loop. One thing you absolutely do not want to do is power the existing converter (if left installed) from your new inverter's output. This is mot definitely a death loop.
Do you have a single 30A shore power supply and a generator. How is the generator switched, by an outlet in the electrical bay that you switch the plug from generator to shorepower or an internal transfer switch. Tell us about that and then we can advise how to hook up your new inverter/charger.
David
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