For years I have used flooded cells in series/parallel circuit and never noticed this. Having completed the motor installation in my boat I have just received my set of four 12V AGM 100 AH batteries and charger, Lifeline batteries and Qui-Q 48V charger with temperature compensation.
Off the truck the individual batteries terminal voltages varied by about 60 mV, not unexpected. I put each through a short discharge cycle and then wired up in series to charge them. At the start of the charging cycle I noticed quite a variation in terminal voltage of each battery which I expected. What I did not expect was that as the current tapered off, less than three amps, the differences in voltage between individual batteries increased quite noticeably. I would have expected that each battery would have accepted the charge it needed and the voltages would have become close to the same for each battery.Would it have been better to charge each battery individually before putting them into series?
After putting the battery stack through a few cycles should the difference in battery voltages go away?
Any thoughts?
thanks,
John Acord
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Posted by: John Acord <jcacord@gmail.com>
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