Dual/R.V. Battery help

[toynut]

I am re wiring my little travel trailer and right about to go buy a battery or two 6 volts as a few guys with trailers are suggesting , has any body any luck with cheaper deep cycle batteries ? I was considering buying interstates through work. Also switch all interior 12V lights to Led and looking into some type of 12V solar charging system. right now the only items that can/ will run off 12V are my fridge while driving so itl be charged by my vehicle as we drive and 2 interior lights and 1 exterior one the water system is hand pump, there is an accessory plug for running 12V items and I am looking into some set up for an air compressor.

 

[cruiserpilot]

I've heard that Costco Kirkland batteries have a great warranty, and seem to be the very cost competitive. I don't know about using the 6 volt, but that is what golf carts use, so it is solid advice I think. Size matters, I've got 2 27 series in my dual battery 60, with 2 winches/lights, etc. I thought about using AGM, but will be sticking with starting batteries. That being said, I am going to go to series 31 just for the extra capacity, so that would be my suggestion.

 

[Glenn-BJ74]

Why two 6 volts - one goes --must replace both-same problem us 24 volt guys have.
Get a big 12v Kirkland deep cycle.

 

[Antarctican]

Two 6 volts for a trailer, one goes, you still have some 6v leds that work, and with some steel wool you can start a fire, with the dead one you can hand it to someone else and say "go back into town and get me one of these" while you sit back with a cold one under dim light. One dead 12V? Useless.

 

[Glenn-BJ74]

Batteries in series are a 'battery' (just like a 12 volt battery is six 2 volt cells in series) - so it is good practice to treat them as one battery and replace both. That is the 24 volt problem - one goes early - you should replace both, but some don't which leads to staggered battery replacement and never having maximum reserve capacity.

 

[sailor]

Well- for maximum deep cycle traction larger individual cells are better- more lead/ electrolyte etc. 2 good 6V are roughly equivalent to one very good 8D 12V but much easier to handle due to weight. The boat I run has 6 four volt batteries in series and parallel to make 12V and this is pretty good. 6 big 2Volt cells would be ideal. the only problem is you must have very good connections with good wire... Of course this is for a much greater load and cycling regimen than we usually see with 4x4!

I have 2 AGM 6V on the garage floor going into my M416 (oneday)

 

[toynut]

I ended up picking up an interstate group 24 battery deep cycle/starting battery. initially I had intended to seek out a true deep cycle battery , I had my parts department where I work look into it for me, we buy a s*** load of batteries through interstate so i ended up getting one for a decent price and i only have 3 interior 12V 1156 bulbs which I am in the process of converting to led's and the 12v water pump I just installed , the fridge is set up to only run off of a.c. .propane or 12V coming directly from my vehicle. I am hoping to get 3 days out of the battery using it primarily to flush the toilet and run the lights.

I am in the process of wiring an isolater from the engine bay directly to the back with a dedicated plug for charging the trailer battery, I dont want it wired into the 7 way connector for a couple of reasons ,
1st i accidentally killed my primary battery by leaving the ignition on listening to the stereo the whole time sending current to charge my two 4d batteries in my previous camper.
2nd i want to be able to run accessories directly from the back of the burb like a 12V compressor .
lastly when i get the time I will be installing a second battery on this isolated circuit.