[Chuck v]

Doyle,


The shore power runs the house battery charger but not he engine battery charger in most of these coaches. For large coaches such as my Tour Master and likely your Sun Voyager which have an inverter to provide 120 volts to small appliances and residential refrigerators in the absence of shore power, there is a third stack of batteries that serve only the inverter and provide starting power for the generator. These inverter batteries are charged by the shore power through the inverter, or if the generator is running can be charged by that.


Do not confuse the inverter with the converter, which is another item in every RV large and small that provides power to the house batteries when on shore power or running on the generator, and this is the source of the house lights when not being sourced directly from the house batteries themselves. In most RV systems the converter charges the house batteries and keeps them at a float voltage while handling all the 12 volt lighting loads when shore power is available.


Coaches contain transfer switches that allow the selection of primary power sources from shore power, generator and/or inverter as appropriate, as well as battery shutoff switches that isolate the house and chassis/engine batteries for storage purposes.


Is your refrigerator an AC only residential type, or is it a propane powered unit? The propane units need 12 volts present to run, even on propane. Loss of a propane refrigerator function along with house lights that also run on 12 volts indicate an issue with your house batteries and possibly the converter.


Let us know what you find...


Chuck