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Old 09-29-2010, 04:13 AM   #1
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1975 31' Sovereign
Waterloo , Iowa
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unvented batteries in trailer

how hazardous is using 2 6v batteries in a trailer without venting?

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Old 09-29-2010, 04:20 AM   #2
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It is definitely NOT recommended. Gasses given of could be explosive

Now that I have said that. I have been running 2 6 volt batteries that way in a home built box for years in my closet, Never noticed any odor from gassing or any ill affects to anything around them.

However, almost all my charging is done by solar at fairly low charge rates.

Not saying it is ok, just that I have gotten away with it. If you can vent that would be better

Insert appropriate disclaimers here.

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Old 09-29-2010, 05:15 AM   #3
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Vassar , Michigan
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Not recommended! I used 12v deep under our goucho for 2 months. No explosion but did notice small amount of battery acid would leak out on the floor. The battery powered our TV and Sat. and got heavy use. After much reading on this forum I checked into vented battery boxes. Cost was high plus I was not very happy with adding another hole in our babies skin. Sooooo we dropped the big bucks for Lifelines (sealed AGMs). Much more piece of mind now.....Tim

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Old 09-29-2010, 08:24 AM   #4
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The vapors will eat anything in the area over time. You may not see it until it is too late as the fabric will rot before it falls apart.
2004 Excursion 4x4
1991 34 ft. Excella +220,000 miles, new laminated flooring, new upholstery, new 3200 lbs axles

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Old 09-29-2010, 09:08 AM   #5
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Reno , Nevada
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Code requires a proper vented box, even for AGM batteries.

It is much in the same vein as turning off the propane when en route. - low risk of high cost incident. That means you can often get away with it, but you are taking your chances.
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Old 09-29-2010, 10:05 AM   #6
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Mesa , Arizona
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For my '72 Sovereign, I built a battery compartment for two batteries on the bottom of the streetside closet. The batteries are housed in a thick plastic tote and these vent out through a plastic tube. My blog has pics and details of this configuration. Truth be told, I don't like putting these in the back, I much prefer to place my batteries up front, like on the tongue, but mounting them there would interfere with the spare tire mechanism.

For my '58 Overlander, I will be placing the two batteries on the tonque. My latest blog entry has a pic of the A-Frame with the new battery mounting.

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