125 pound batteries - are you kidding me that you might pick up one by yourself?
I would much rather recommend a set of 4 golf cart batteries, they are 'only' 67 pounds each, and 220 amp hours each. Much easier to move into place. And it will spread out some of the weight over a square foot or so each.
I put two golf cart batteries in my storage compartment, and two came mounted just behind the front bumper of my 97 Bounder based on a Ford chassis. I have large wires running between the factory battery and the second pair, as well as 000 size wire to the inverter! This is rated at around 150 amps, and protected by a 300 amp fuse that I had laying around.
Good luck,
Fred.
