Anyone experienced problems with the 110 to 12v system. I awoke to dim lights the other morning while plugged into 50 amp service. I turned off the 50 amp and went direct to the truck connection and the battery started to recharge. After a day of driving the battery was charged but upon hooking to land power for the night it went down again. The wall plugs work fine. I am having to keep a battery charger turned on to keep power to the 12v lights. Any clue?