It may be a true, true, unrelated scenario. I am not a solar or charging system expert but your converter should detect that you’re hooked up to shore power and switch off the solar charging. Sounds like you’re saying that your solar is still charging even on shore power?
Can you confirm that your AS switching to shore power? We don’t have solar on ours so when we hook up to shore power, we can see it in our multiplex that the batteries are charging/charged and more importantly the microwave actually turns on.
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