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
MEXICOWANDERER wrote:
To arrive at true quiescient voltage connect to 3-1/2 digit DMM when there is no movement upward or downward in the hundreths column for two minutes the starting voltage has stabilized.
Again I say total time to traverse 50% - 100% state of charge is significantly quicker in an AGM battery. Period. No ambiguities. Skewing of data happens via methedology not physics. Charge acceptance is higher at 50% through 99%. Verify static using impedence comparisons.
Wet batteries demand 14.8 for shortest charge time. The Lifeline recommendation is 14.4 all decided at normal 25c cell temperature.
Charge resistance increases in a flooded battery as fill passes 70%. You need to compare I curves at recommended constant E not the reverse.
Mex, that is clear, thanks.
The problem is though, that we are using "current limited" chargers, so it doesn't matter if the battery could accept more amps, the amps number is fixed at that level so it is not a variable for this exercise.
PT wants to know if the lower R of an AGM, which ought to mean it will accept more amps at a higher SOC, but at the same voltage, will keep the full amps flowing until that higher SOC is reached, which will make for a faster recharge than if it had started tapering earlier.
So far we have one test that shows it will and one that shows it is the same.
