Forum Discussion
pnichols
May 31, 2015Explorer II
I did notice one thing in the earlier clicky article concerning AGM batteries that was not emphasized - only maybe hinted at.
The article mentioned the low internal resistance of AGM batteries so that more current could be dumped into them when charging with little concern for battery over-heating (...if one has a charger that can maintain the necessary voltage while simultaneously supplying the high current).
However there is another advantage from AGM batteries having low internal resistance. They will charge faster - than wet cell lead acid batteries - at any applied charging voltage above their intrinsic rest voltage. This means that even the lowly stock RV converter will pump more current into discharged AGM batteries than a converter will with discharged wet cell batteries.
Our AGM batteries have seen almost entirely only converter charging and engine alternator charging over their nearly 9 year life.
The article mentioned the low internal resistance of AGM batteries so that more current could be dumped into them when charging with little concern for battery over-heating (...if one has a charger that can maintain the necessary voltage while simultaneously supplying the high current).
However there is another advantage from AGM batteries having low internal resistance. They will charge faster - than wet cell lead acid batteries - at any applied charging voltage above their intrinsic rest voltage. This means that even the lowly stock RV converter will pump more current into discharged AGM batteries than a converter will with discharged wet cell batteries.
Our AGM batteries have seen almost entirely only converter charging and engine alternator charging over their nearly 9 year life.
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