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© Erwin Hymer Group North America, Inc., R00
Electrical System
Coach Batteries
The coach batteries in your Roadtrek are sealed AGM batteries. DO not attempt to open them. There is no user maintenance possible on these batterers.
Battery Disconnect Switch
The battery disconnect switch provides power to all 12-volt appliances, such as the water pump, the
refrigerator, and so forth. This switch should be off when you are not using your Roadtrek, and on
whenever you are driving or camping. The "Battery On" light next to it will indicate the position of the
switch.
Inverter Charger
Your Roadtrek is equipped with a 2000 watt inverter-charger which converts 120-volt AC (household
current) to 12-volts DC when you are connected to shore power or running the optional gasoline
generator. This 120-volt power is used to power your 12-volt DC appliances as well as charge your
batteries. Whenever you are receiving either source of 120-volt power, you are charging your
batteries.
Alternator Charger and Battery Isolator
While driving, your Roadtrek will also charge the coach batteries from the vehicle's alternator through an
isolator. The isolator allows extra vehicle alternator-produced electricity to charge your coach batteries in
addition to keeping your engine (chassis) battery charged. When the vehicle engine is not running, it
breaks the electrical connection between your coach batteries and your engine battery, so your engine
battery remains charged to start your engine even though you are using coach battery power while
camped. This is all automatic - there are no user adjustments possible to the isolator.
Optional Solar Panels
The optional solar panels will charge your batteries when sufficient sunlight is available. The solar charge
controller is installed at the factory for the type of panels and batteries installed on your Roadtrek, and
Erwin Hymer Group NA strongly recommends that you make no adjustments or changes to the charge
controller or its programming. If equipped with a display, the charge controller usually displays either
system voltage or amperes generated by the panels.
Battery disconnect switch
Solar charge controllers
