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Old 04-29-2016, 12:20 PM   #11
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Originally Posted by boondocking View Post
Same problem with (2) 12v. If one 12v shorts out it will kill the other one and you will be in the same situation, no 12v.
Not talking about shorting out, talking about one getting a dead cell. Plus you can always unhook the one bad 12v and recharge the other and have 12v, not so with (2) 6 volts.
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Old 04-29-2016, 12:31 PM   #12
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Only problem with (2) 6volts is if you loose one, you are SOL for 12v. Not so with (2) 12volts.
X-2 I agree with Coot.
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Old 04-29-2016, 12:50 PM   #13
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HI here is a century battery box that may work.

Century Plastics: White Heavy Duty Battery Box - (part#: GCE-G)

This is 6 volt battery box but they have battery boxes for 12 volt battery also.

Hope this helps Tim
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Old 04-29-2016, 01:11 PM   #14
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I needed to replace my two group 24 marine/RV batteries and didn't have room for the height of 6v ones. Wanted true deep cycle, and finally settled on one Trojan T1275+, that easily fit in the space, and has 150AH at 20 hour rate. This may be a good compromise for limited space. 12.88L x 7Wx 10.88 H (top of terminals).
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Old 04-29-2016, 05:03 PM   #15
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X-2 I agree with Coot.
Been there, done that with 2 12V batteries. One died, which resulted in the other dying before I realized what had happened. You have to know that one has died to separate them to recharge the good one - you cannot recharge a good one when still connected in parallel with the bad battery. Don't ask me how I know this.

Two 6V GC2 batteries fit in the same space (slightly taller) as 2 Type 24 12V, cost less, and have more AH.

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Old 04-29-2016, 07:55 PM   #16
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6 verse 12

Not trying to hijack this thread but I am not understanding the whole 12 volt verse 6 volt. Which is better for long term use? Why?
My thought is 12 volt deep cycle is better, two 12 volt deep cycle would even be better than one 12 volt deep cycle.
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Old 04-29-2016, 10:04 PM   #17
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Not trying to hijack this thread but I am not understanding the whole 12 volt verse 6 volt. Which is better for long term use? Why?
My thought is 12 volt deep cycle is better, two 12 volt deep cycle would even be better than one 12 volt deep cycle.
A TRUE 12v deep cycle battery is hard to find and not cheap.
Most 12v batteries on RVS are marine dual purpose and NOT true deep cycle.

6v golf cart batteries are better for serious camping and boondocking.
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Old 04-29-2016, 10:14 PM   #18
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Thanks for the replies. I went ahead and went with 2 6v batteries as the dealer confirmed the 2-29 series 12v I wanted wouldn't fit unless I used a tray instead of boxes. The 6v cost the same as the 12v would have and the 6v give me more Ah so there we are. Boxes SHOULD fit as well. We'll see on Monday when I try to install.
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Old 04-29-2016, 10:34 PM   #19
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I am assuming you are talking TTers here and I have a 5er but they both use 12volts, so this might just pertain. I am somewhat of a fusion technician so with that in mind I shall proceed. My 5er came wit two 12's and we barely got through a weekend. I decided to pull the 12's. Boxes and all. I replaced the boxes with an aluminium frame, that held 4 six volt batteries. I then fashioned an angle iron shelf above all the batteries and fit a plywood cover. The cover is just above the batteries allowing lots of air circulation and provides a solid shelf for extra storage. No problem with dead cells or shortage of power since.
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Old 04-29-2016, 11:20 PM   #20
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My last TT I installed two DC 12V along with a (batt 1,batt 2, or both) marine switch. I could measure each battery with a flip of a switch and charge together or independently. I was limited on battery tray space and did what was suggested earlier (flipping covers) so they would fit closely together. I ended up with a dead cell in one and was able to tell easily. My new TT has enough tray space for two with the top covers facing the same direction.
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