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Old 07-07-2014, 09:08 PM   #15
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I have to replace my batteries and I am looking for the best suggestion. The battery tray on my motorhome will only fit 3 batteries. I am sometimes off grid for 4 or 5 days. What would give me the best bang for the buck, 2 6volts, 2 or 3 12volts, or should I see if I can modify my tray to fit 4 6volts? I am trying to keep my genny use to a minimum.
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Old 07-08-2014, 10:16 AM   #16
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I have no extra room for more batteries.
I have a 1999 Triple E Commander.
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Old 07-08-2014, 12:18 PM   #17
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Battery suggestion

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Originally Posted by jimbo2013 View Post
look at the amp hours?????

Never make it off the grid for more than 2 days

These are 12 v batteries NOT 6 volt.....so the capacity is added up

300 ah total


Two GC2 6 volts would only give 232 ah
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Old 07-08-2014, 08:23 PM   #18
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What about 2 Costco 6volts vs 3 walmart everstart maxx 29dc.
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Old 07-08-2014, 08:40 PM   #19
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What's the height available? You could go with 300-400 ah 6 volt batteries. Search for L16 deep cycle battery
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Old 07-08-2014, 08:53 PM   #20
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Battery suggestion

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What about 2 Costco 6volts vs 3 walmart everstart maxx 29dc.

Don't buy everstart.....not a true deep cycle battery

Look again at the SCS150 battery I posted above. High capacity, true deep cycle
and 3 of them should fit the dimensions you posted.
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Old 07-09-2014, 10:57 PM   #21
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For 6 volt batteries, is there a big difference between the costco and us battery 2200?
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Old 07-10-2014, 10:05 AM   #22
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Usually say 6volts but in your case I would go with the 3 12volts with 345 amp hours. This will give you near 3/4 the usable energy of the 4 6volts. But the 12volts must be true deep cycle batteries not start batteries.

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Old 07-11-2014, 01:13 AM   #23
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OP - You may have answered this, but I was not yet clear - How much head room do you have? How tall is your battery compartment. For example, the L16's are a taller battery. Or say Trojan's T125 or T145, have the same 'foot print' as the T105 GC units, but provide more AH within that same footprint, by being taller.

And as mentioned, AGM's will help you in a couple of ways, and hurt you in only one way. Help = Faster charging, and lower SOC discharge levels. (Faster charging, only if you have a charger that can handle the AGM charging.) Hurt = Your wallet.

Best of luck on your search...
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Old 07-11-2014, 08:10 AM   #24
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Nothing taller than a gc2 6volt.
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Old 08-07-2014, 12:07 PM   #25
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among all deep cycle batteries, consensus is that trojan is superior. as an earlier post indicated, you can get t-105 for $100 each, which is probably less than 15% higher than runner ups. if i were you, i would go for it. on the other hands, if you can get about $70 each for another brand, yes, it makes sense to go with that.

as for 12v vs 6v, other than 12v is heavier, i don't see many benefits from choosing 6v over 12v. trojan j85h-ac (12v) is exactly equivalent to two t-105's in series. it weighs 120 lbs, not that bad. i installed it myself with no problem at all. by the way, how many times in its life do you need to move it around any way?

i think it all depends on the space you have (3 dimensions), and your will to maximize the capacity. here is mine, i am using 3 j85h-ac to get 675 ah.

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Old 08-11-2014, 11:39 AM   #26
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Ok, I just measured my battery tray and it is 13" 21". No way to fit 4 6 volt batts. So, 2 6volts or 3 12volts?
By the way, I am in Canada and the lowest price on Trojan t105 here is $155 .
When looking for Trojan T-105s, I was checking on line and battery supply places. I finally thought to check a golf car(t) dealer and got mine for $116 each plus core. They took my Grp 24 12v as a partial core.
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Old 08-13-2014, 04:38 PM   #27
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Do you have access to "Crown" batteries. If so, check them out.
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Old 08-20-2014, 09:12 AM   #28
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Originally Posted by RodK View Post
I have to replace my batteries and I am looking for the best suggestion. The battery tray on my motorhome will only fit 3 batteries. I am sometimes off grid for 4 or 5 days. What would give me the best bang for the buck, 2 6volts, 2 or 3 12volts, or should I see if I can modify my tray to fit 4 6volts? I am trying to keep my genny use to a minimum.
Modified my tray 1" in width. Bolted the black bars front and rear to accomodate additional width. Measure-measure-measure before starting.
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