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Old 12-17-2012, 05:14 AM   #1
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Two 6 volt gel batteries ?

I was thinking of changing the trailers 12 volt for 2- 6 volt gel batteries,wondering if anyone has done this mod.How does your tow vehicle handle the charging circuit.Does you trailer have any issues charging the batteries? Thank,s

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Old 12-17-2012, 06:27 AM   #2
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Well here is my read on this:

1) 2 6 volt batteries are wired in series and the converter's output is hooked up by putting the (+) wire to one battery and the (-) wire to the ground post of the other battery. A short 2 gauge or larger wire connects the 2 batteries. The connecting wire should be as BIG as possible (even 0 gauge) because the connecting wire is treated the same as "internal resistance" in a 12 volt battery.

2) Gel batteries (even deep discharge ones) are maintenance free, but that is their ONLY advantage. The have a VERY high price per amp hour and the have very few amp hours compared to a standard lead acid maintenance type.

Typical gel house batteries have about 200 AH and two 6 volt gel type batteries double the volts and not the AH when in series. So you will spend a LOT of money for 200AH of capacity. Gel Golf Cart Battery In this case 750 plus shipping for 200AH

With a flooded lead acid maintenance battery system you can get 2 6 volt Trojan batteries (top of the line) putting out 235 AH at 12 volts for about 400 plus shipping.


Lou and Laura with Bella - German Short Hair Pointer
2008 GMC Sierra 2500HD Crewcab SB Allison Duramax
2010 Flagstaff 8526RLWS - Superglide 3300
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Old 12-17-2012, 08:49 AM   #3
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Thank,s Herk,after a dry run with the 6 volt batteries I am having a hard time justifying the extra weight.back to the 12 volt battery!
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Old 12-17-2012, 12:02 PM   #4
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IMHO, Lou is correct on all counts. Here's an additional consideration-- or more.

Gel advantages mean you can put it in any orientation, and they do require less mtc, sort of. But, with the minimum mtc comes a different charging system-- maybe.

Gel batteries are sensitive to charge rates wherein a heavy bulk and over-charge will probably ruin the cells. You should consider the charger system you have before you make the decision. A good monitor system is an effective way to keep you traveling forward.

The batteries Lou recommended are less prone, or more forgiving, in charging and discharging.

Also of interest, most places in the world carry LA 6-volt golf cart batteries, which means if one goes you can replace it without the second one getting replaced too. However, itís always best to keep both batteries equal in date because one loses or charges at a different rate. In a pinch, Mexico and or some out of the way place.

This means over charging one but not the other isn't good. I know, this statement is convoluted. Obviously, no battery multiple is going to be exactly the same at anytime.

Unless you have a reason such as battery placement, you might be wise to follow Lou. Different strokes for different folks, as they say.

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