Relocating battery

I'm probably one of a handful of guys that have done this, relocating LA batteries inside an RV. It's usually more than the average RV owner wants or needs to do. I did it for weight considerations.

I built my own box but most guys would find it easier to buy an off-the-shelf dual battery box and install a vent. The vents to and from the box do not have to be that large. The amount of hydrogen gas displaced during charging is not a large amount. Yes, it's a good idea to have a lower mounted fresh air supply hole in the battery enclosure to provide gas flow to the outside. Hydrogen is much lighter than atmospheric air. If you're concerned about hydrogen flow back out of the air inlet (really shouldn't be a concern), install a flap on the inside of the battery box or put a small fan onto the air inlet.

AGMs don't need to be vented. One of the benefits of paying a little more...

The MTS style of vented, hose, battery box have a bottom drain hole that provides for inlet air. Ours came that way from the factory in an enclosed compartment.

If it's in a sealed box with out going vent then you need a in coming vent. That said, rewiring to converter is required but not that difficult, also, power coming from TV for recharge can be affected due to longer distance. And make sure you have 12v supply to break away switch for TT brakes.

Greywolf26dbh wrote:
I am looking to upgrade my battery to two golf cart's. However, I can't handle the additional tongue weight ...

Really? You haven't said just which 12 volt battery you have but it likely weighs 50 to 60 lbs depending on which group size it is. A GC-2 6 volt typically weighs about 60 lbs so if you replace the single 12 volt with a pair of 6 volts you'd be adding about 60 lbs more to the trailer tongue, with perhaps 80% of that showing up as tongue weight because the batteries will actually be sitting aft of the coupler which is where tongue weight is measured. If increasing your trailer's gross tongue weight by a mere 50 lbs puts you well over whatever rating it is you're concerned about that suggests you have bigger issues that just gross tongue weight. Have you weighed your trailer fully loaded and ready to camp so you know where it's average GVW typically sits and in that state have you weighed the tongue so you likewise know for a fact what it's average gross tongue weight is? And yes, in case you're wondering I do know what I'm running with my own trailer as I long ago invested in a purpose designed Sherline tongue weight scale so I know for a fact just what percentage of gross tongue weight I'm typically running.