Capacity Testing and 20 HR Rating
I'm thinking about doing a capacity test on my four GC2's. They have a 20hr rating of 215Ah. One thing I'm curious about is how the 20hr rating would have been determined. Being 6v, would they h...
Forum Discussion
Mex,
I'm realizing more and more, Temperature is a huge factor in all this, and yet it is one of the most ignored factors, it seems. It may be interesting to have some sort of Temp sensing probe, right down inside a cell, to see what happens at different levels during charging.
But I'll be happy to just find a depth of cycle that plays well with whatever (P10) eff% setting I choose; if only to get a better hold on what % soc amps start to taper. Actually, I did notice amps began to taper right in that 89% soc (-45Ah) range I was shooting for, when at my 14.4Vabs setting. But that was according to the Trimetric, which was clearly off by (?)% points.
And I noticed something the other evening, which I had seen before. Just before amps taper, voltage rises a bit, and then drops back down once amps do begin to taper. It's like a little voltage spike, just before amps are about to taper. It's kinda like the rise in amps I often see, just before going into float.
It may be worth mentioning, the modded pm4b does not go into constant voltage mode, but rather raises volts throughout the entire charge. So, for example, at my 14.4 "Vabs" setting, voltage rose to 14.3v, then dropped to 14.25v, right after amps began to taper, and then continued rising from there.
I'm realizing more and more, Temperature is a huge factor in all this, and yet it is one of the most ignored factors, it seems. It may be interesting to have some sort of Temp sensing probe, right down inside a cell, to see what happens at different levels during charging.
But I'll be happy to just find a depth of cycle that plays well with whatever (P10) eff% setting I choose; if only to get a better hold on what % soc amps start to taper. Actually, I did notice amps began to taper right in that 89% soc (-45Ah) range I was shooting for, when at my 14.4Vabs setting. But that was according to the Trimetric, which was clearly off by (?)% points.
And I noticed something the other evening, which I had seen before. Just before amps taper, voltage rises a bit, and then drops back down once amps do begin to taper. It's like a little voltage spike, just before amps are about to taper. It's kinda like the rise in amps I often see, just before going into float.
It may be worth mentioning, the modded pm4b does not go into constant voltage mode, but rather raises volts throughout the entire charge. So, for example, at my 14.4 "Vabs" setting, voltage rose to 14.3v, then dropped to 14.25v, right after amps began to taper, and then continued rising from there.
