Should the house batteries be charged by shore power, or do they get charged by the motor alternator/external generator? House batteries are new. I've been stationary for a couple of months, running on shore power. I checked them today via the xantrex inverter and they were under 11 volts.
And note that at least on mine, plugged in with the use switch off the switch is lit up anyway. I use the inverter display to verify that the converter is on since when it's on the battery voltage will be higher than when it's off.
Pete and Carolynn Foss from Oxford, MI
2018 Four Winds 31W
1999 Aero Cub F-21 trailer
1977 Tioga 24 foot RV