I no longer have a Magnum inverter. What you seem to describe, is that you have AC power coming from your generator but no charge for the house batteries. There is a setting in the Magnum equipment which controls this. If I remember it is labeled , "Shore". If the power draw from your RV reaches what ever you have this option set at, then it decreases the amount of power supplied to the charge process. This could be your cause. I encountered the same problem in the past and it was this setting which corrected it.
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2018 Four Winds 31Y
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