# and Type of house batteries
I have a 2019 Jayco 22' C Class. is it better to have one group 27 battery or two group 24s?
Forum Discussion
I should have made it clear in my reply that when one 12v battery slips in performance, my smart charger kept trying to get the pair to a full charge but could not. My smart charger would not give up and shut off.
The weak battery pulled down the pair, over charging the good one causing boil overs to both.
On my work bench with batteries separated, my smart charger completed the charge to the good battery and stopped. The ill battery would not accept a full charge, causing the charger to keep trying. So when they are back in the motor home together, it is an ill situation.
While on a trip, I would have been better off identifying the weak battery and take it off line and do the trip with just one battery.
The ill situation happened to two sets of 12v batteries, a repeatable condition that has me issuing my warning working with pairs of 12v batteries. If you replace your 12v batteries every other year, you avoid such problems.
The weak battery pulled down the pair, over charging the good one causing boil overs to both.
On my work bench with batteries separated, my smart charger completed the charge to the good battery and stopped. The ill battery would not accept a full charge, causing the charger to keep trying. So when they are back in the motor home together, it is an ill situation.
While on a trip, I would have been better off identifying the weak battery and take it off line and do the trip with just one battery.
The ill situation happened to two sets of 12v batteries, a repeatable condition that has me issuing my warning working with pairs of 12v batteries. If you replace your 12v batteries every other year, you avoid such problems.
