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Old 01-04-2011, 02:32 AM   #1
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Our Cruiser came with 2 12v group 27 batteries which lasted only a year. One now has a dead cell and the other is weak. We do a lot of dry camping and use a generator to charge the batteries when hookups are not available.



What is the general opinion of batteries, whether to replace with 2 12v or 2 or 4 6v batteries. What setup would be better for dry camping? Any information on personal experiences and brands would be appreciated.
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Old 01-04-2011, 04:33 AM   #2
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I recently upgraded to 2 Trojan 6v from the 2 12v Interstates that the dealer put in. My only regret was not doing it sooner (well that and the cost)The 6v rv batteries are IMHO opinion the only way to go for "dry camping", which is almost all we do. I had several extended (4-5 day) outings last summer, and didn't have to worry about charging the batteries at all. It was warm weather and we we would only run the furnace when we got up in the morning to warm things up. We did however do a 4 day 3 nighter in late Oct that we did have to run the furnace overnight and still did not have to charge. I had the generator with us just in case, but never took it out of the back of the truck.

I would like to have 4 6v, but I don't think I have room in my battery compartment.
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Old 01-04-2011, 05:42 AM   #3
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I guess I'm pretty much in agreement with everything rock1424 stated.
I upgraded this past summer also. Two Trojan 105 6v. I'm still looking for more room. I would like to have 4 of them, but at $200 apiece, it's slowing me down alittle.


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Old 01-04-2011, 10:27 PM   #4
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I don't have my 5er yet, but I can tell you that everyone on the sailing forum I belong to agrees that 2 6V batteries are superior to one 12V, and depending on the battery, better than 2 12V batteries! The problem, as I understand it, with RV's is that they run 2 12V batteries in parallel without any way to use them separately. The fact that you had one battery with a dead cell and the other one was weak is probably not just circumstantial. If they were being run in parallel the dead cell battery would draw large amounts of current from the better battery causing the better battery to need constant charging, which is hard on a battery and would shorten it's life. If you ran them separately you would 1. realize that one battery had a dead cell because it would not perform well and 2. not damage the other battery. Boats typically have 2 or more 12V battery banks, but have a way to use one while leaving the other one fresh. This is done with a special switch that is labeled 1-2-ALL. It allows you to use battery #1 or #2 individually. If you need the extra current capacity of having the batteries in parallel you can put the switch in the "ALL" position. If I do very much dry camping I will be putting in extra batteries and a 1-2-ALL switch.

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Old 01-05-2011, 02:52 AM   #5
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rock / old farmer.........thanks for the info. I went to the trojan web site and see that they have 3 6v series. What made you choose the ones you did? Also I noted that each series has a "Plus" battery as well. Do you know what that means?
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Old 01-05-2011, 11:05 AM   #6
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If I remember right, I called Trojan's tech service and talked with them about their batteries. For the life of me I can't remember what the story was on the plus batteries. They have an 800 # or you can email them with questions. You can buy the 145s and get more AH but it will cost more $. You have to decide if you need more AH then what is in the 105s.

Ridgeman has the 105s in his rig and had them in his old camper also. They were 10 years old and he said they were testing good yet when he sold it. I guess I figured for what I wanted them to do, the 105s would do it. I know I'm very satisfied with the way they are performing for me this year.


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Old 01-06-2011, 01:01 AM   #7
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I went with the 125s for the extra amp hours (I also got an excellent deal on them which made the decision easier...I probably would have got them anyway??)



If I remember correctly the plus batteries have a different terminal configuration and maybe different caps. I don't think there is any diffence in the ah rating on the plus but not 100% sure on that.



As Lloyd stated, their 800# has an excellent tech service that will answer any questions you have. I called them after I bought mine to ask them about max discharge voltage and they were very helpful.
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Old 01-06-2011, 06:29 AM   #8
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Thanks for the info. I emailed Trojan and asked the PLUS question.
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Old 01-07-2011, 12:51 AM   #9
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Quote:
Originally Posted by David & Carolyn
Thanks for the info. I emailed Trojan and asked the PLUS question.




I'd be interested in their answer if you could be so kind as to pass it along Thanks.
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Old 01-07-2011, 01:50 AM   #10
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rock, the PLUS on all batteries is a special flip top cap with a water level indicator. They didn't tell me the extra cost but I am going to look into it to see if it is worth buying.
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