Charging AGM Batteries

landyacht318 wrote:

I have seen my vehicle's charging system put out more than .3c limit for the 3 group 65 or 24 size AGM batteries I was considering. Each time it will also climb upto least 14.8V too given a drive longer than a few miles. Perhaps it is too shortlived to be dangerous, but the shortlived aspect could be the higher resistance of my flooded batteries. I don't know how the vehicle's Voltage Regulator will react to thirsty AGM batteries

If an AGM is limited to 0.3C does it also sacrifice other AGM attributes like very low self discharge and maintaining higher voltage under heavy load / maintaining higher CCA for the same DOD as a similar capacity flooded battery?

You could increase the size of your wiring to create a higher voltage drop which will lower amps too. #6 can handle 100 amps so just keep the size over that. And I have seen no correlation between charging rates and amount of self discharge. Low self discharge seems to be a common trait with all high CCA batteries (can't think of the correct word here). No worries there.