Next message: Alan Lewis: "Re: lv-ab: Prop for Gulfstar-43"
IMHO, Pierre almost has it right.
Think of all your house batteries as one bank. Now build in the ability to
switch *each* battery into or out of the bank. Do this with a breaker
/switch sized like this: Total service amps for the bank / number of
batteries in the bank rounded up to the available breaker size. Note that
Total service amps equals the expected demand including inverter at rated
output. this number must be less than the amp rating of the bank. (Usually
much less.) Note this is amps only not amp hours.
Your service wiring *to the plus and minus distribution hubs* must be up to
this ampacity.
Each breaker is installed in the positive side right next to the battery it
protects. The wire to the breaker from the battery need not be more than the
breaker size.
Blues Seas has the breakers in surface mount and panel mount.
Advantages:
You will be wired to ABYC standard,
You can take out any battery right from in the engine room where you are
working so you will be less tempted to work on a connected battery,
the bank is protected from an individual battery or cell failure because a
high amp rush to a failed battery will trip the breaker yet leave the bank
alive,
you have a little more safety when working with batteries of different ages.
I agree with Pierre re the SC225 as long as you don't risk any injury or
damage in placing or removing them, and the cost is less. Often this time of
year deals are available on T105, 125.
Richard
----- Original Message -----
From: "ShanicaJII" <>
To: "Emory Jones" <>;
<>
Sent: Monday, April 02, 2001 7:37 AM
Subject: Re: lv-ab: Luders 36 Electrical
> Dump the idea of 6v batts. That's old news. Trojan makes really great
deep
> cycle 12v batteries! I've got 4 SC225's on board. They give me 520 Ahrs
> for a foot print not much larger than 4 6v t-105s Leace the golf cart
> batteries in the golf carts. The SC225s are True marine batteries based
on
> Grp 30 case sizing. You'll never regret it if you go this way. Plus
there
> are fewer inter connects to deal with. If 1 battery goes bad, just pull
it
> out and you still have a decent bank size.
>
> I've got mine set up as 2 sets of 2 batteries with a paralleling switch.
> That way I can isolate 1 set while I work on them.
>
> Also if you co this way. Leave the bank paralleled most of the time.
It's
> better for the overall life of the batteries if they are in 1 large bank
> opposed to alternating between 2 banks.
>
> Pierre.
>
> ----- Original Message -----
> From: "Emory Jones" <>
> To: <>
> Sent: Monday, April 02, 2001 9:19 AM
> Subject: lv-ab: Luders 36 Electrical
>
>
> > I am beginning to upgrade the electrical system on a Luders 36 Cheoy Lee
> > Ketch. It has a Westerbeke W27 diesel and it runs well!!. What size
> > alternator can I expect it to handle(amps)? My thought is to put in two
> > banks with twin 6 volts. Am I on the right track? Open to any and all
> > suggestions.
> >
> > Thanks
> > Emory
> >
> >
>
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