I am pretty sure the Vista does not have a charging circuit relay for charging Chassis battery bank from generator or shore power. There should be an isolator that will allow charging of the house battery bank from the alternator when the drive engine is running. You can call Winnebago customer support to be sure.
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Mike, RVIA & RVSA Certified Master RV Technician
Amy, Dr. Assistant - Roxie & Mei Ling, four legs each
2000 Gulf Stream Scenic Cruiser 450 hp & 1330# torque
06 Saturn Vue, 06 Chevy Z71 4x4 & 2014 Corvette Z51 M7
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