AGM vs Flooded Bulk Times
PT keeps asking whether AGMs will spend more time in Bulk at the same charging rate. I found a good example where that can be measured, using ah64id's test with his PD4655 on his pair of Lifeline...
Forum Discussion
jharrell wrote:
Any Idea what the absorb voltage was for ah64id's test with his PD4655? 14.3v is Lifelines recommendation and Magnums AGM1 setting, Magnum has AGM2 for most other brands (Trojan) at 14.5v and you can set custom to whatever you want.
Seems like some here recommend higher (14.8v?), at a higher absorb V it should stay in bulk longer right?
EDIT I found his post with Google but it is gone from here. Note that he forgot to allow for heat loss when he did his AH count during the recharge, so his SOCs are a titch high.
https://mopar1973man.com/topic/8408-pd4655-converter-charging-graph/
His converter terminal voltage reached 14.4 and held there. the battery voltage reading was 14.1 when the converter reached 14.4, then battery voltage kept rising during Absorption to nearly 14.4 by the end.
Yes, at the same charging rate, a higher Vabs setting would take longer to reach. But various batteries have their own specs as to recommended charging voltages. Luck of the draw (or buying forethought) whether your charger can meet the specs for the battery you have.
