Quick battery test
Start testing by measuring the voltage on the house battery before plugging in or starting the generator or starting the RV or tow vehicle engine.
Fully charged, you should read above 12.7 to 13.0 volts. 12.4 volts and below means it needs a full 14 to 18 hour charge.
If battery is charged, the generator should start.
If not, plug in the shore power for a day.
Battery dead in two days could mean:
Battery is not charged
Battery is past useful life.
Battery charger/converter/inverter is not working properly.
Some appliance is drawing a lot of 12 volt power.
Battery is not getting a full 14 to 18 hour charge.
Dutchman Kodiak Cub KD176RD 2018
Nissan Pathfinder 2015