IRONHEAD said:
I have a 2014 Thor ACE 30.1 The coach battery is not charging. This is what I have done , replaced a good coach battery, replaced a good converter. Well some people do these things.I tested them but did not believe the results. I tested the converter as instructed . The converter is working. The battery is new and is not charging. I checked the voltage before it gets to the circuit breaker. However it charges when the vehicle engine is running . AM I doing something wrong to cause the battery not to charge? I keep it plugged in.
Let's start with basics. Is this battery the one that starts your coach? Has it charged before? Are you geting 13+ volts at the outher(house) batteries? They should be 4 ea 6 volt Batteries.
When the motorhome engine is not running, the chassis and auxiliary batteries are
kept separated from each other within the electrical system through the use of a battery
isolating controller. The controller prevents the auxiliary batteries from discharging the
chassis battery when the motorhome is parked.
Some additional characteristics of the isolator system include:
1. Delays connecting the auxiliary batteries to the charging system for
approximately 15 seconds, to allow the alternator time to reach full
charging ability.
2. After this initial time delay, if the alternator has come up to full
charging ability, (13.2 Volts) the isolator will electrically connect the
auxiliary and chassis batteries together for charging.
3. If the charging voltage drops below 13.2 Volts for a period of 4
seconds due to low idle speed and or excessive load, the isolator
will disconnect the auxiliary batteries until the voltage returns to a
level of 13.2 volts for about 10 seconds.
4. In the event the automotive battery is discharged, it will be
necessary to press and hold the Start Switch located in the dash.
From about page 97 of the owner's manual.
It could be a bad battery isolating controller. Let me know what you find.
Bill