IOTA graph vs PD graph
OK, I came across two graphs posted here. Both happened to be in Salvo posts but I think one originated with Bigfootford. ANYWAY... I'm sure each graph has been discussed and dissected on its own...
Forum Discussion
smkettner wrote:
Go a little big on the PD, 60+ is fine. You need 60 if you want to get 45.
A little less on the IOTA, 45 amp is fine. Bulk less than an hour seems a bit much to me.
JMHO.
With a poor connection PD might be favored as it will hold 14.4 volts for 4 hours and can be reset. IOTA will get tricked and drop voltage to 14.2 fairly quick.
Mostly a draw as both are excellent.
The short duration of bulk is thought provoking. He was at C/4, which by most people is considered quite aggressive. He got 50AH in an hour. 45 amps would be about C/5, still considered to be on the aggressive side but less so. With a 45 amper, the most he would have gotten in all likelihood is 45AH. So in a one hour race, the 55 wins. But in two hours, who knows. Salvo has another interesting graph in the same post, showing the SOC at X volts at given rate of charge. I interpret that graph to show what the SOC will be when in this case an IOTA drops from bulk, at a given rate of charge. Unfortunately C/4 is not shown, and I don't know if it can be reasonably extrapolated.
