Next message: (no name): "Re: Insurance (was lv-ab: Choice of boats: Cabin cruisers (long & windy))"
I'd suggest making all four batteries into one bank. Anotherwords each pair
in series then parallel with each other. Nigel Calder covers this in detail
in his "bible." You should also have a separate battery for starting and use
some type of battery combiner/isolator to handle charging of the starting
battery. See http://www.amplepower.com
> -----Original Message-----
> From:
> [mailto:]On Behalf Of kaha
> Sent: Tuesday, August 24, 1999 5:27 PM
> To: live aboard list
> Subject: lv-ab: batteries
>
>
>
>
> 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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