[Carl n Susan]

You don't say what year and model you have, but most Montanas have plenty of room for four, or even six, 6V batteries. If you have the generator prep you might be too tight for six 6V but four definitely should fit. I use the white plastic battery box for four of my batteries. You have to make your own vent system, but PVC parts make this easy.


Here is a description the of the four 6V battery box and one of the places you can buy one. Clicky