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Old 01-25-2013, 08:04 AM   #15
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We changed the house battery on the boat from 12V to two 6 volts. More amp hours and made removal, etc. much easier with two sixes vice one big 12 volt.
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Old 01-26-2013, 10:51 AM   #16
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Do you have room for Two 12v batteries, if so go with 2-12v. Not just any 12v, but an AGM. They are not cheap, usually in $200 range.

The reason to go with 2-12v's - if you have 2- 6v's and one quits you are dead.

With 2-12v's and one quits you still have a back-up.
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Old 01-26-2013, 01:20 PM   #17
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Originally Posted by JohnBoyToo View Post
Sorry your having a bad day
but maybe you can explain to me why verification is a bad thing ?

and you're worried about the bandwidth ?
so should there be only one response to every thread ?
not much of a community then
Worry about bandwidth when you become a supporter ... or an admin !

and IMHO the yep post will be received better than the negative post...

remember, we are all just spending a little time here, skip the post if you want - good luck !
[moderator edit] are you talking about???????
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Old 01-26-2013, 08:20 PM   #18
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First make sure it is a true Deep Cycle and not a Marine deep cycle. Second, make sure your not giving up amp hours. From what I have been reading on this and other forums, the best bang for the buck is two 6 volt golf cart batteries. They are true deep cycle and typically cost less for the amp hours provided.
Not sure the difference of a "True Deep Cycle" and a "Marine Deep Cycle" is. Can you please explain ?

I find this video useful to explain the different types of batteries.

West Marine Batteries - YouTube

Also look at Lifeline Batteries along with Trojan Batteries websites.

Remember when connecting 6 Volt batteries in series (to get 12 volts) you do not double your Amp Hours. Link here
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Old 01-26-2013, 09:03 PM   #19
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aOne simple point needs to be made here when talking about 6V and 12V batteries; we all know that we put two 6V batteries to get 12 volts. You can easily buy one 12 volt battery with the same amp-hour capacity. The problem with that is simply in the weight. As I recall, the GC2 batteries weight about 80 pounds; a 12 volt battery of the same capacity would weigh about 160 pounds. Its HARD to carry one of those dudes around!

The golf cart industry uses 6 volt batteries because that's an easy number to multiply. They may use 36 volts, 48 volts, 42 volts, or whatever the designer has in mind. They just string the right number together to get the desired capacity.

The automotive world has settled on 12 volts as a standard, so that's what RVs use.

OK, lecture over. There will be a quiz next week.

Tom
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Old 01-26-2013, 09:58 PM   #20
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You can buy 2- 6 volt golf cart batteries at Sams or Costco for less than one 12 volt AGM battery.
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Old 01-26-2013, 10:20 PM   #21
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If you only have one battery bank for both start and house than I would stay with 12 volt types since the loss of 1 of the 6 volts would be bad. However if you have two banks, switchable, than you would would have to lose your 12 volt start battery and one of the 6 volt house batteries at the same time to be unable to proceed.
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