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
"I imagine if one were relying on generator only, no solar, that 50 to 80%, even if 80 is not really 80% anymore, takes longer and longer to achieve, the more partial state of charge cycles that have accumulated."
Getting confused there! Each successive 50-80 takes less time because the 30% worth of Full is a smaller amount of AH each time (Full getting smaller each time)
That was how I first noticed progressive capacity loss while camping. Before I had a Trimetric. It was the time it took to do 50-90s getting less,
Also the morning voltage was getting lower each day after doing a 50-90. My daily AH use was the same but the battery bank was getting smaller even though I was doing a whole 50-90 (the 90 was by mark of 5 amps per battery)
SOC is a percentage. If it is a % of a shrinking AH total, that same SOC will be at ever fewer AH too.
It makes sense that as the bulk time shrinks, the absorption time gets longer (see my ugly graph!) to reach the same SOC.
Also, I wonder if that extended absorption time LY sees is including some "recovery time" even though recovery mostly needs a higher amp recondition.
Getting confused there! Each successive 50-80 takes less time because the 30% worth of Full is a smaller amount of AH each time (Full getting smaller each time)
That was how I first noticed progressive capacity loss while camping. Before I had a Trimetric. It was the time it took to do 50-90s getting less,
Also the morning voltage was getting lower each day after doing a 50-90. My daily AH use was the same but the battery bank was getting smaller even though I was doing a whole 50-90 (the 90 was by mark of 5 amps per battery)
SOC is a percentage. If it is a % of a shrinking AH total, that same SOC will be at ever fewer AH too.
It makes sense that as the bulk time shrinks, the absorption time gets longer (see my ugly graph!) to reach the same SOC.
Also, I wonder if that extended absorption time LY sees is including some "recovery time" even though recovery mostly needs a higher amp recondition.
