Yes I have look through some of the posts, but I haven't found anything on having to modify the battery box. There was one thread that stated there are some group 27's that will fit into the existing box anyone know which models those are?
It's not so much in modifying the batter box, the tray that is in the box will only fit a 24. IIRC, you simply have to remove the tray at the bottom and the 27s will fit with a bit of finesse*.
*provided your battery box is the same as the one on my 2004
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Don't forget that the battery boxes are sealed and vents to the outside. If you are using wet cell batteries any disturbance to the box allowing the batteries to vent inside will result in fumes being let into the living compartment, NG. Airstream may have replacement boxes to accomodate the larger size of battery.
Hope this is of some help.
__________________ Bill and Janice, We're lovin' it! (Airstreaming)