2011 Cedar Creek RE 5th Wheel Low Voltage Battery Issues

bertmary wrote:
I plug from truck to 5th wheel and start the truck. It starts charging the batteries enough to get by. The shore connection will not charge the batteries.

The shore connection is whats supposed to charge the batteries through your converter. You have a problem with your converter. It takes in shore power and converts it to run the 12V things AND charge the batteries. You should never rely on the TV to charge the batteries unless you've made significant modifications to the TV's wiring.