Quote:
Originally Posted by DavidEM
This might be a good time to segue into real deep cycle batteries vs pretenders. Real deep cycle FLAs (flooded lead acid as opposed to AGMs and the only inexpensive ones are 6V golf cart batteries), have filler caps, more room above and below the plates for electrolyte and thicker plates. Each are important for long term deep cycle use.
AGM batteries for the most part can be used in deep cycle service because as best I can tell, there is limited difference in AGMs advertised for deep cycle use and run of the mill AGM batteries. Another RV forum member once noted that one brand which differentiated deep cycle from starting models had a heavier battery weight for their deep cycle version. That indicates more lead and heavier plates which is the one characteristic of FLA deep cycle batteries that is important for AGMs in deep cycle use. But I think that the way AGMs are built minimizes lead plate losses during deep cycle use.
AGMs do not require checking electrolyte levels and can be mounted in any position. They and FLAs experience shorter life if discharged below 50% although some believe that AGMs can go lower. Don't know for sure as I have never seen any data for AGMs.
David
|
Excellent dissertation but here is some more facts.
!. Lead-antimony batteries can be deep cycled more times than lead-calcium batteries.
2. Lead-antimony flooded batteries require more frequency maintenance as they near end of life (water and equalization).
3. Lead-calcium batteries have lower self-discharge rates and will draw less current when on float than lead-antimony batteries.
4. Lead-calcium positive grids grow in length and width when overcharged. Over long periods this can lead to case rupture (higher than required float voltage).
Thor Forums
