# 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
Ron, FWIW the high resistance open failures I've experience in the past in my liquid acid vehicle batteries had nothing to do with balancing (since they were single starting batteries) or probably my charging method (stock engine alternators).
It must have been just plain early failures from internal corrosion or normal vehicle g-force vibration. AGM should eliminate the g-force issues. I don't know if AGM batteries would be any less resistant to internal corrosion failures than liquid acid.
Just for good measure, if you ever add two more 6V batteries to run in parallel with your current two 6 volters - make sure that the two banks of series batteries are balance-interconnected between them.
(But if you do add two more - please don't burn down you little Class C with all that stored electrical power on tap. ;) )
It must have been just plain early failures from internal corrosion or normal vehicle g-force vibration. AGM should eliminate the g-force issues. I don't know if AGM batteries would be any less resistant to internal corrosion failures than liquid acid.
Just for good measure, if you ever add two more 6V batteries to run in parallel with your current two 6 volters - make sure that the two banks of series batteries are balance-interconnected between them.
(But if you do add two more - please don't burn down you little Class C with all that stored electrical power on tap. ;) )
