I'm not sure I understand? You start the engine with shore power connected and the chassis battery is not being charged by the alternator? Or are you saying that if you start the engine with Shore power connected and then shut off the engine that shore power does not then charge the chassis battery? I have always been "goosey" about starting the engine when on generator or shore power or starting the generator while the engine is running. I know the system is supposedly built to handle it, but I just have never been comfortable with doing it.
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