Next message: Don Dement: "Re: Internet access? (was lv-ab: New York)"
Why do you conclude that the "back" set won't be charged the same? The
identical current goes through "front" and "back" when they are in series. You
named them bank "1" and "2" in parallel but from your question I assume you
mean the two 6v batteries in series in each set may not charge the same. ?
Perhaps you could explain the problem prior to starting the float stage with
batteries at different states, for whatever reason.
There can be a subtle difference during high charging rates when a charger is
connected to one "end" of a parallel string if the wire size is not large. The
end of the string will get very slightly lower voltage and the battery there
may not get as full. As a result, a good parallel connection will have the
source connection in the middle of the string. But this is a really minor
problem.
BTW, we can all work through the differences in your use of the word "amp" but
really you should be using "amp-hours" when talking about *energy* storage and
dissipation, and using "amps" when talking about the amount of *current* such
as from an alternator.
--
Regards --- Don Dement
kaha wrote:
> A question?
>
> I have installed two battery banks, both sets are deep cycle 12v
> (2x6v):
> Bank 1: 2 sets of 12v (2x6v) each set 235amps = 470 amps total.
> Bank 2: 1 set of 12v (2x6v) 235 amps = 235 total.
>
> Charging capabilities:
>
> 1 alternator 150 amps
> solar panels 80 amps (on a good day)(hawaii)
> 1 charger a/c 45 amps
>
> usage per 24 hours: 90 - 100 amps per day
>
> Discussion:
>
> When two banks of batteries are connected in series/parallel in
> order to increase the overall amperage, charging them evenly seems to be
> a problem. If the charging system (alt., solar, etc...) is connected to
> the front two batteries with the voltage regulator, then, when the
> regulator switches to the float stage the back set of batteries are not
> at the same point of charge. (like filling a stack of glasses)
>
> So, using this type of set up, the back set of batteries will never
> reach float/fully charged state. This could greatly increase the
> sulphation (and life) of the back battery set.
>
> Question:
>
> Is there a solution to this.? How can I charge Bank 1 (all)
> batteries equally without over charging the front two, or without it
> taking forever.
>
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