Battery Box Mod for 6 Volts

[merchantmm]

I recently completed the same battery exchange on my 2014 27' FC RB Twin. Box had to be modified by 3" in height. And yes we have the large exterior locker up front so modification was made at the bottom of the box. All was handled in 2 days by the Airstream dealer where we purchased and store our unit. $300.

[kscherzi]

I finally got around to replacing the 12 volt batteries with two six volt batteries. Got two Trojan T-105's when I was in Los Angeles last weekend. There were a much better price there than at home. These replace the original Airstream Interstate group 24 12 volt batteries. I trimmed the plastic holder at the bottom of the battery box to allow for the slightly wider dimension of these batteries, otherwise it fit perfectly.

The project was not totally simple as I ended up replacing the battery cables with marine type. The other cables had some bad corrosion and they had the wrong terminals, automobile type. I'm happy with the result. Usable amp hours from up from 80 to 112 (total Amp hours of 225). We used to get about three days camping with the original set, this should give us about five. I have a solar setup so doubt I'll ever have a power problem.

[drairstream]

I'm looking at a mod on a 99 27' safari. I think I'm going to buy a racing battery box and weld in a new support box. will match the aluminum on the trailer.

[waninae39]

be sure to leave a few holes in the bottom of the tray . water and moisture will get into the box. make it easy for the water to leave.

as well, prime and paint any holes to minimize rust

[Hermes]

What model Lifeline AGM batteries are you using?
I am looking at a similar mod, with 4 six volt batteries (Trojan) in a new custom built battery box, but they weight around 65-70 pounds each, which is 280 pounds, less the 114 pounds of my two existing 12V, which is a net increase of 166 lbs, which brings the tongue weight to a little over 1000 lbs; a weight which my 3/4 ton TV can handle (as well as the hitch, rated for 1200 lbs).
You mention 440 pounds of battery, that's a lot of battery!