Math is Hard-- C Rate ?
I am confused about how many amps in a C rate, if anyone can explain that again. Thanks. After getting the SiO2s late last year, I charged them to as full as they would get, which was at 14.6v wit...
Forum Discussion
I see now, that "C-Rate" has a more specific meaning to many, and also that graph makers and the rest of us are looking for a short-cut way to express current wrt the AH size of the battery bank. Looks like "C-Rate" has been taken, so we can't use that?
Trojan in their guide uses the form "C20" for the capacity at the 20 hr rate. (5 amps per 100AH)
(for AGMs) "as the current slowly declines. The
absorption phase ends when the current stabilizes at a low value of approximately 0.005 x C20"
We say that AGMs need to be charged at 14.x volts until amps taper to
"0.5 amps per 100 AH of battery bank". Trojan says that is "0.005 x C20", while that other guide uses those CA numbers , so they would say that is "0.005CA"
When my actual battery bank of 200AH settled at accepting 0.2 amp at 14.6v, ( 0.1 amp per 100AH) Trojan would call that 0.001 x C20, 1/10th of that "0.01CA, so their graph does not get low enough for long enough in time I guess to reach True Full.
So what is "C/5" really? Batt U. says C-rate of 0.2C = C/5, the five hour discharge rate. ISTR LFP specs saying they can be charged at 1C or like BB, recommended at 0.5C.
Trojan in their guide uses the form "C20" for the capacity at the 20 hr rate. (5 amps per 100AH)
(for AGMs) "as the current slowly declines. The
absorption phase ends when the current stabilizes at a low value of approximately 0.005 x C20"
We say that AGMs need to be charged at 14.x volts until amps taper to
"0.5 amps per 100 AH of battery bank". Trojan says that is "0.005 x C20", while that other guide uses those CA numbers , so they would say that is "0.005CA"
When my actual battery bank of 200AH settled at accepting 0.2 amp at 14.6v, ( 0.1 amp per 100AH) Trojan would call that 0.001 x C20, 1/10th of that "0.01CA, so their graph does not get low enough for long enough in time I guess to reach True Full.
So what is "C/5" really? Batt U. says C-rate of 0.2C = C/5, the five hour discharge rate. ISTR LFP specs saying they can be charged at 1C or like BB, recommended at 0.5C.
