[C320-list] [Spam:SpamScore 3.0] Re: Are 6V Batteries Superior To 12V Batteries

[crashley at gte.net]

This is not correct. 2 series 6V, 200 Ah batteries create a single 12V, 200 
Ah battery.

Here's an equation for you:

P = C * N * Vcell * DOD

where P = watts hours extracted
C = capacity (Ah)
N = number of series cells (6 or 12)
Vcell = cell voltage on discharge (~1 V/cell)
DOD = depth of discharge (0 to 1 , 1 = 100%)

CRA
Rosebud #882

----- Original Message ----- 
From: "turk" <turk2 at ZOOMINTERNET.NET>
To: "C320-List" <C320-List at catalina320.com>
Sent: Sunday, June 25, 2006 7:00 PM
Subject: Re: [C320-list] [Spam:SpamScore 3.0] Re: Are 6V Batteries Superior 
To 12V Batteries


> Just remember when you run 2 - 200 amp hour 6v batteries in series,  to 
> get 12 volts, each 6v 200 amp hour battery contributes only 100  amp hours 
> at the new 12v rate.   Hmmmm, there's an equation for this.
>
>
>
> On Jun 25, 2006, at 9:50 PM, Warren Updike wrote:
>
>> I can't disagree with much that's been said.  However, I've not see  the 
>> arguement on price and capacity.  I don't know why it is but I 
>> understand golf cart batteries have about 200 AH capacity.  Also,  golf 
>> cart batteries can be found at Sam's Club, BJ's, and I presume  CostCo 
>> for quite a bit less than equivalent 12V 4D from the likes  of BoatUS. 
>> Price of about $60 seems to ring a bell.
>>
>> A number of people have replaced two 4Ds with four golf cart  batteries. 
>> Total amp hour capacity goes from about 270 to 400+ AH   for less money. 
>> Unless there is a kickker, that sounds like a good  deal.  Compare the 
>> dimensions of the golf carts vs 4Ds.  I  understand they are a bit 
>> taller, but otherwise fit in the same  horizontal space.
>>
>> I chartered a 52' Tarten in BVI and the captain said he has 12 6V  golf 
>> cart batteries on board because they are much less expensive  to buy, 
>> weigh less (easier to install/remove,) and have more  reserve capacity 
>> than equivalent marine deep-cycle batteries.
>>
>> Warren & Pattie Updike
>> C320, #62, 1994, "Warr De Mar"
>> Frog Mortar Creek, Middle River
>> Chesapeake Bay
>>
>
>
>