2 group 31 lead acid batteries.

[Jimmy_trees]

Hi all.
I'm looking to remove my 2 group 24 lead acid batteries and replace them with 2 group 31 lead acid batteries. I have a mallard m26. The place where the batteries sit won't fit the 31's. I have a modification in mind but thought I'd see what you guys have done.

 

[Bogie]

You don't say what RV you have. I did this on my old 5th wheel. I bought a new battery box for two golf cart batteries. Then just had to figure an attachment method and add a vent to the top. I cannibalized the original battery box for the fitting for the vent tube.

You can find some different size boxes at this site.
https://powrparts.com/products/copy-of-heavy-duty-battery-box


Hope that helps.

 

[travelin2]

What Bogie said if you’re staying with lead acid. I went with group 31 AGMs. Just needed the bigger box.
Bighorn fifth wheel

 

[wdk450]

Group 27 batteries are a size/capacity compromise from the standard group 24's. They fit in the group 24 battery boxes.