inverter/charger

Skip,

As it was built, most likely it does not do that.

In the 20 years since that coach left the manufacturer, a lot may have transpired. While a piece of the system may have been replaced, or a device added, most likely this does not been done. It requires the owner to put in that capability.

Without knowing that specific coach, I can only make a guess and recommend a device called a Trikl-Start. That will charge the chassis battery when connected to shore power. Or, if the isolator that allows the house battery to be charged by the main engine (chassis) system has been replaced with a "Combiner", then that is taken care of.

Matt

That would be dependent on if the house and chassis DC power buses have the capability of being cross connected to support the charging of both. Most rigs, but not all, are set up from the builder to do so.

What is the make, model and year of the coach the Magnum MS2000 is installed in?