thanks, BFL ! it's starting to sink in, (i think?), although i still don't get how to read the graphs? :(
and perhaps one piece of the puzzle that is missing for me is, what effects the voltage rate the most, as it rises to the 16v set point during boost mode? soc? battery capacity? charge amp/rate?
QUOTE:
"Note that doubling the charging amps does not halve the time, but doubling the bank size with the same charging amps doubles the time."
??? does this refer to only lower soc charging (50-80), or higher soc (80-97) as well?
as for my chargers: the question seems to be whether or not my nautilus 15amper will have enough amps to do the entire abs charge, once the pm reaches its 14.6v set point, and kicks into abs mode. and i don't really want to continue using the peak 40amper, with the way it was (mis)behaving. and neither charger has the ability to do Eq'ing, anyway.
so if i can determine how many amps the batts will accept at the beginning of the abs charge (at say 14.6 Vabs), i should be able to size my 2nd charging source to suit, correct?
and if correct, and IF that number is not far above 20 amps, i should be able to reach a healthy compromise using the meanwell nes-350-15, which puts out about 23a at 15v and a little under 22a at 16v. thus, it would serve well as an abs charger, top charger, and eq charger, all by adjusting the voltage alone. otherwise, i will need something with higher amps (and adjustable amps for eq'ing).
this is where -- EDIT: -- going with a smaller bank -- could be to my benefit, correct? for if i understand what you're saying, -- EDIT: a smaller bank -- would result in the batts accepting a higher charge rate, during both the 75a boost charge and the 23a abs charge, -- EDIT: -- as a result of the lower SOC, after normal daily usage -- thus reducing charge times significantly. and i could do a 90-100 on the smaller bank with my gennie in a lot less time it would take to do it on the 430ah bank.
here's a scenario:
i figure i'm going through about 20 ah's a day, during the 4 day week, depending mostly on laptop use; and, depending on the weather, maybe up to 25 to 30 ah's a day during the 3 day w/e. and i would like to start using my microwave more, so that could raise things up another 8ah per day for each of the 7 days.
with my work schedule, and where i park, i would like to charge sunday, wednesday, and friday evenings. so, even if i used 85 ah's from 8pm sunday evening 'til wednesday at 4pm, that would give me an SOC of about 50% on a 215ah bank that started with 90% SOC (194ah), correct? and if done efficiently, i should be able to do a 50-90 within the 4 hour window i have. YES? NO? MAYBE? (or i could even charge daily, to possibly reduce sulfate build-up?). and then do a 60-90 friday evening, to replace about 65ah's of usage, and a 50-90 sunday evening to replace about 85ah's of usage. and if i added solar, that could possibly change to 50/60-97's, with a top up on fridays.
is this realistic, charge-time wise? thanxx!
