Originally Posted by WineStream
The PO of my moho added a battery box external to the coach. He bolted a framework on to the chassis under the entry steps (kinda like where batteries are on the later silver mohos). There's a single group 27 there. If it ever warms up a bit and I get up the gumption to lay on the dirt floor of my storage barn, I'll shoot some pics. I'm not sure if this would be an option on a 20'er or not.
Back in 2008 I ran across a Argosy 20 same year and floor plan as mine. In 20' Argosy the batteries are located front and center in the engine compartment. When you lower the front hood the batteries are staring you in the face. What the other owner did was to move the starting battery down into the right front wheel well. Seemed to be a good location. I am considering something similar for my starting battery.
I've crawled around under mine a fair amount and at the moment can't think of any place a battery could be placed. I'll take some time this weekend and look again at the underside of the chassis to see if there is some place to locate a battery.
In my trailer, I have one AGM under the bed. The original battery location was near the rear of the trailer and it actually fell out!!! going down the highway. I chose not to risk that again and bought an AGM specifically to go inside the living space. It is literally right under where my head is when sleeping. I also have an Iota charger / converter; so I feel safe that there's no issues.
Is your AGM in a special vented box or just mounted under the bed with no special precautions? My original hope was to have two coach batteries and I've come to the conclusion that there just isn't room in the back under the bed for two. However I believe AGM batteries can be laid on their side so possibly my best option is to use one AGM battery laid on its side in a box vented to the outside. Laying on it's side would provide me some room for running a vent line up hill enough to vent properly.
This is the area I have to work with. The water pump is going to be moved as is the electrical panel so there is some floor space, the main problem is vertical height. Just not enough to vent a battery standing up.