[Public-List] Batteries

[mahseer at kos.net]

Jonathan.

On my boat I have 4 6v 225ahr wet cell deep cycle golf cart batteries and
a separate automotive starting battery.  the house bank is charge by a
Balmar 612 multi stage external regulator feeding a 100 amp alternator.  I
feed the starting battery from the house bank using a Balmar digital duo
charge multi stage charger.  To monitor house usage I have a Xantrex link
10 battery monitor, this may be a little over the top for you as I do a
lot of long term cruising (ie Bahamas and back twice) so you could down
size the house bank some what.  To charge the bank correctly you need an
external regulator and high output alterantor in retrospect a 70 amp
alterator would have the correct size, link 10 could be optional in your
case, as for the start battery with it having different charge
characteristic  a means of charging correctly is needed hence the extra
regulator.

John Boor
MAHSEER #380



> I have just replaced a Gell battery that had lasted about 6 years. In
> doing so,
> I started to do some research, which is always a problem, as now I know
> something I cannot blindly whack in some new batteries, so ... here I am.
> The
> battery I took out was a deep cycle Gell  400 CCA 86AH battery. I have two
> of
> them, and a Yanmar 2GM to start. My household requirements are minimal -
> lights,
> and when I get my tank cleaned out a water pump.
>
> My questions:
>
> What size batteries do most have?
>
> It seems that voltage regulation is key to long battery life. The new way
> of
> doing thins is to have a multistep regulator of some sort. I seriously
> doubt my
> boat has that. Should I get one? How do I measure what is happening on the
> current regulator? My last batteries lasted a fair bit, so, I am guessing
> it is
> not too far off the mark, but ...
>
> Any comments are welcome.
>
> Jonathan
> #197 Laughing Gull
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