2011 Georgetown Coach Batteries not charging despite being plugged into shore power all the time. Converter putting out 13+ volts plus. Thinking problem now may be a bad solenoid in the battery box area preventing it switching on or off to allow converter power to pass thru. Does anyone out there know an easy test....Voltage Meter ? Basically understand what the solenoid does, just do not know how it actually works or how to test the 4 terminals. Would hate to spend $80 for something that is not bad. Also what about the 150 amp Battery Control Breaker..how would I test if it is good? Thanks for any help of suggestions. thomanddebbie [ Knowing just enough to be dangerous }