Battery problem
Our battery in the RV went down this weekend and wouldn't stay up while running down the road. I checked it once back home, and with the switch in "Store", the battery puts out about 8.5 volts whet...
Forum Discussion
tenbear wrote:
12.5 to 13 volts is lower than I would expect to see when being charged by the alternator or by the converter. I would expect the alternator to put out 14+ volts. The converter, depending on the converter, could be anywhere between 13.2 and 14.4 volts.
What is the voltage on the chassis battery when the RV is unplugged and the engine is running?
I didn't note the exact number, but it was about 12.5 volts.
I've been reading up on this tonight and found the following.
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.
That's certainly interesting. I checked it with the engine idling, and it was at about 12.5 volts. With the engine off and the battery switch in "Store", the battery was at about 8.5 volts.
It's most confusing. I know it was charging with the engine running, but it was well below 13.2 volts.
I've got a new battery that'll go in tomorrow. I'll just have to monitor it closely.
