battery banks
:h this is for the TT group. i have been looking to add an extra battery bank to the tub. when we purchased it. it had already been converted from a single 12 to dual 6. yea i know we haven't even ...
Forum Discussion
Sam Spade wrote:The question is unanswerable.westend wrote:
Few batteries can take even 40 amps of charge current beyond the first few minutes.
OK.....so how many individual batteries will take less than 20 amps when their state of charge is really low ? Because that is the point at which you could charge two at the same rate as one.
Lets say you have four batteries, for example. All of them have been discharged to 75% SOC. You connect a 40 amp charger to them and the 40 amps of current is shared by all four, only up to the point that any of them will no longer accept their apportioned allowance of current. That point may be in a few minutes. The rest of the charge time, there is much less current going to each battery as they have gone beyond that point where 40 amps can be accepted. If an experimenter was looking for a difference in the whole time it takes to charge one battery vs charging four, it would be a few minutes as the bulk of the charging time is between 90% SOC and 100% SOC, where total current is not important.
