Forum Discussion
RoyB
Feb 09, 2015Explorer II
Are you talking about the TRUCK START BATTERY which is referred to as the "CHASSIS" Battery or the TRUCK "COACH" BATTERY that runs your RV section ceiling lights and other 12VDC items.
I would think the the truck "START" Battery usually only gets charged when you are running your truck engine.
The "COACH" trailer Battery usually gets re-charged when you are plugged into SHORE POWER from the on-board CONVERTER/CHARGER unit.
I am not all that familiar with all the 12V BYPASS switches the motorhomes have but perhaps one may have the start battery switched in to aid the living quarters of the RV...
In my RV TRAILER setup I like to measure the COACH battery bank with a multimeter or panel meter just sitting there and if it is fully charged it will read 12.6-7VDC. When I plug my trailer into shore power then I see this DC VOLTAGE jump up to 13.6VDC telling me the Converter/charger unit is working to keep it charged up.
If the truck "START" battery is discharging just sitting there then something else must be turned "ON" on the truck side to do this.
Roy Ken
I would think the the truck "START" Battery usually only gets charged when you are running your truck engine.
The "COACH" trailer Battery usually gets re-charged when you are plugged into SHORE POWER from the on-board CONVERTER/CHARGER unit.
I am not all that familiar with all the 12V BYPASS switches the motorhomes have but perhaps one may have the start battery switched in to aid the living quarters of the RV...
In my RV TRAILER setup I like to measure the COACH battery bank with a multimeter or panel meter just sitting there and if it is fully charged it will read 12.6-7VDC. When I plug my trailer into shore power then I see this DC VOLTAGE jump up to 13.6VDC telling me the Converter/charger unit is working to keep it charged up.
If the truck "START" battery is discharging just sitting there then something else must be turned "ON" on the truck side to do this.
Roy Ken
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