08 Newmar Kountry Star.when plugged into shore power the float charge on the monitor reads 13.8but the batteries are dead. Charged the batteries up yesterday to 11.7. They held that over night. I have pushed the reset button on the converter but no change. Batteries have water in them and all connection are clean. Does this indicate that the converter is bad?.

11.7 is a dead battery. 13.8 sound like you have a charge voltage on the battery. Did you put a voltmeter on the battery with/without the charger plug in. Build in volt meters usually are not very accurate. If you have a different charge, pull the neg. cable and charge the batters at 2 to 10 amps till they show they are charge. This can be from 6 to 24 hours. Write down that voltage. Should be around the 13.8 for a good battery. Wait two hours plus and connect the neg. cable back and put a load on the battery for a while. Do not take it down more than 12.4 volt. Did you take a battery hydrometer test since you said you water level is good? Write down each cell before you charge and 2 hours after your charge and before you put a load on the battery.Last take a battery volt reading and then plug in your charge and take a reading. You should see close to 13.8 if it is working.

MountainAir05's advice is great. How old are the batteries?

11.7 volts is funeral time…dead, dead, dead. Think about Lithium when (not if) replacing. Yes! Do this…”Last take a battery volt reading and then plug in your charge and take a reading. You should see close to 13.8 if it is working.”

What was the voltage before you put it on the charger? Lead acid batteries are just over 2 volts per cell. If you read 10 volts you have a dead cell in the battery. If it has a dead cell it's time to replace the battery.

The batteries are one year old.. When The cables from the converter back to the batteries are disconnected, the converter puts out 12.7 volts. The volts at the batteries before the charger was put on was 2.8

no charge at batteries | Good Sam Community

ArchHoagland
Explorer
May 10, 2022
MountainAir05's advice is great.

How old are the batteries?
MountainAir05
Explorer II
May 10, 2022
11.7 is a dead battery. 13.8 sound like you have a charge voltage on the battery.

Did you put a voltmeter on the battery with/without the charger plug in. Build in volt meters usually are not very accurate.

If you have a different charge, pull the neg. cable and charge the batters at 2 to 10 amps till they show they are charge. This can be from 6 to 24 hours. Write down that voltage. Should be around the 13.8 for a good battery. Wait two hours plus and connect the neg. cable back and put a load on the battery for a while. Do not take it down more than 12.4 volt.

Did you take a battery hydrometer test since you said you water level is good? Write down each cell before you charge and 2 hours after your charge and before you put a load on the battery.

Last take a battery volt reading and then plug in your charge and take a reading. You should see close to 13.8 if it is working.

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