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,
In the past, I have considered a few things, in trying to establish what constitutes say a 90% SOC...
1) the Trimetrics readout (assuming it's fairly accurate, which I'm discovering is not always the case),
2) OCV, based on comparisons to 50% and 100% readings (which I'm now realizing I need to allow for more voltage drop as SOC decreases thru the 0% to 50% DOD range, when trying to establish an SOC vs. OCV correlation), and,
3) guess-timating, as best I can, looking at amps x time - ?losses.
It's certainly not a perfect science, but I'm trying my best to consider as many things as possible.
And obviously I need to establish an SG to SOC relationship, as well... which will require a few more capacity tests, I think, at various loads.
In the past, I have considered a few things, in trying to establish what constitutes say a 90% SOC...
1) the Trimetrics readout (assuming it's fairly accurate, which I'm discovering is not always the case),
2) OCV, based on comparisons to 50% and 100% readings (which I'm now realizing I need to allow for more voltage drop as SOC decreases thru the 0% to 50% DOD range, when trying to establish an SOC vs. OCV correlation), and,
3) guess-timating, as best I can, looking at amps x time - ?losses.
It's certainly not a perfect science, but I'm trying my best to consider as many things as possible.
And obviously I need to establish an SG to SOC relationship, as well... which will require a few more capacity tests, I think, at various loads.
