Thor Forums

[Beau388]

Assuming you have a Thor class A of modern vintage, make sure the store/use switch is in the USE position and the system will take care of the batteries if it is operating normally. All modern Thor Class As come with a three stage converter. The last stage is a floating charge of 13.4/5 volts. Min voltage needed to charge a flooded battery is 13.4 volts. If you have an inverter you can check the house battery's condition by turning the inverter and observing the battery voltage. If no inverter, then you need a volt meter to check the house battery. 13.4/5 volts is good; less than that is bad. The converter system also includes a bi-directional relay which should also keep the chassis battery charged. Be sure an check the water level every 30 days or so.