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Old 04-25-2007, 10:23 PM   #15
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Quote:
Originally Posted by JK3500
I have been working on setting up my 2005 International 22' for long-term boondocking. My first dilemma was replacing the single 12 volt battery setup to a two battery setup. I decided on two 6 volt golf cart batteries based on the recommendations of several here and other battery articles posted here and elsewhere on the net (thanks rseagle for pointing me in the right direction). The batteries I purchased are the GC45G 244 aH batteries from Deka (http://www.eastpenn-deka.com/assets/base/scrubber.pdf).

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I figure you added about 140lbs to the tung weight with the batteries in that position. Do you have any concerns about the added weight? Did you box in the frame for added support?
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Old 04-26-2007, 07:14 AM   #16
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Originally Posted by Pacerized
What if you're just using a regular deep cell marine?
When I look at what I have from the factory it doesn't seem that different. The box still comes in under the couch. I've never noticed any issues with it. I'm putting in a temp. control charger converter, so I shouldn't ever have an overcharge issue. Is the concern with the gas due to corrosion, or is it a safety issue from being toxic?

Thanks: Charlie
ANY liquid cell battery WILL gas during the charging cycle. AGMs have no free liquid, hence no gassing. If you use an interior battery box, as I have seen often in smaller class 'C's it MUST BE SEALED AND VENTED TO THE OUTSIDE to assure that no hydrogen sulfide can escape to the interior of the coach.

This type of box is readily available.
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Old 04-26-2007, 07:37 AM   #17
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Quote:
Originally Posted by Janet's Husband
I figure you added about 140lbs to the tung weight with the batteries in that position. Do you have any concerns about the added weight? Did you box in the frame for added support?
It was a consideration. Actually though, I added a bit under 100# as I replaced the single 12 volt (50# +/-) for the 2 x 6 volts. Also, the new design Internationals and the other current models are pretty much all running 2 batteries and 30# propane tanks. Others, like Rseagle have added similar weight to the tongue with no problems. Also, the rack itself is quite a bit stronger than the factory battery rack, which sat between the frame rails as now the weight of the batteries is directly on top of the frame rails. I do plan to weigh the tongue soon to see where I am at, especially as I intend to replace the 20# propane tanks with 30#.

As far as the question asked earlier about 2 x 6 volts vs 2 x 12 volts, I too read all the debates and articles on batteries and talked to a number of battery shops. The general consensus I got was, for the $ the golf cart batteries are a better choice over 12v, as they provide more amp-hours and typically will last longer than standard 12 volts. I know alot here are using the AGMs, which have alot of advantages over standard lead-acid batteries but for me the cost was too high.
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Old 04-26-2007, 07:45 AM   #18
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Quote:
Originally Posted by Pacerized
What you did looks great, and doesn't take away from any storage on the trailer. This may be a stupid question, but would it be possible to just add a sealed battery box inside the trailer? My factory battery box has an opening on the side of the trailer with a plastic battery box that fits under the couch. I've read that deep cell batteries emit some gas. Would adding another plastic battery box with a lid (like Walmart sells) under the couch be safe?
Charlie
I actually thought about that, as ideally I would have liked to have a 4 battery set-up. Thought about a sealed box with 4 AGM batteries mounted under the bed and vented to the outside. From talking to folks I think it is completely doable and would keep the weight farther back from the tongue. In the end the cost of such a set-up, along with the fact the wife did not like the idea of batteries (AGM or not) right under the bed kept me from pursuing it. jk
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Old 04-26-2007, 11:14 AM   #19
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Quote:
Originally Posted by Pacerized
What you did looks great, and doesn't take away from any storage on the trailer. This may be a stupid question, but would it be possible to just add a sealed battery box inside the trailer? My factory battery box has an opening on the side of the trailer with a plastic battery box that fits under the couch. I've read that deep cell batteries emit some gas. Would adding another plastic battery box with a lid (like Walmart sells) under the couch be safe?
Charlie
People are doing this but it is not recommended for the reason that Lew mentioned. If for whatever reason the pressure rises to a point where the relieve valve opens (> 2 PSI) the Lifelines (and other AGMs) will out gas into the living area. Normally this would only happen from overcharging, particularly using a non-regulated charger. AGMs must be stored in a vented compartment just like regular lead acid batteries. You could fabricate a sealed box that vents to the outside however.
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Old 04-26-2007, 11:44 AM   #20
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Who is the vented box that Lew and Randy are talking about available from?
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Old 04-26-2007, 08:30 PM   #21
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Originally Posted by SmokelessJoe
Who is the vented box that Lew and Randy are talking about available from?
Most well stocked RV supply shops have them, or 'should' have them. If you can't find them, let me know and I'll get you a list.
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Old 04-27-2007, 12:34 AM   #22
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I'm glad I came across this thread. I plan on adding another battery, and didn't take the gas danger into proper consideration. I did a search on ventilated battery boxes, and they seem to be used largely in race cars for those wanted to move their battery inside. It looks fairly simple to use these, they just seal, and have a couple of ventilation tubes that you could run to the outside. I think I'm going to look into this. I've already bought the new Parallax temp control charger which I installed tonight. It varies it's charge based on battery temperature, and voltage with a wider range of charge options the the 3 stage chargers. This should go a long way toward preventing overcharging. Putting this in place of the old univolt opened the space to add the additional battery. I think I'll do a little more homework, but I'm leaning toward adding this vent box.
Thanks: Charlie
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Old 04-27-2007, 07:36 AM   #23
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Very similar arrangement to mine. Good job!
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Old 04-27-2007, 06:19 PM   #24
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I'll look into getting some sealed vented boxes in stock for interior installations. There are not many like Charlie found but they do make them.
Also, for those that do some serious dry camping, the new Lifeline 300 AH 6 volt just became available. Pricing is probably not for the faint of heart and I don't know yet if we can ship them UPS like the others. I'll have the details next week but you can see the specs on the lifelinebatteries.com website.
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Old 04-27-2007, 06:23 PM   #25
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Quote:
Originally Posted by 68 Overlander
I'll look into getting some sealed vented boxes in stock for interior installations. There are not many like Charlie found but they do make them.
Also, for those that do some serious dry camping, the new Lifeline 300 AH 6 volt just became available. Pricing is probably not for the faint of heart and I don't know yet if we can ship them UPS like the others. I'll have the details next week but you can see the specs on the lifelinebatteries.com website.
Please let me know if you get something like this. The price on the box I found was around $100 which seems a little high for a plastic box with hose coming out.
Thanks: Charlie
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Old 04-27-2007, 06:34 PM   #26
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You can buy a vented battery box at many RV parts houses. LaVanture products makes one.

I just bought one for about $26. It's plastic, has a tongue and groove seal. You do need a hose and outside vent.

I plan to use AGM batteries, but I still use a vented box. I never know what the next owner may do.
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Old 04-27-2007, 11:12 PM   #27
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Thanks Mark:

I found a site online for this box, but it only showed a 24 series size. I'm looking to add a 29 series battery with the box. I was also able to find another box that I think might work, but I"ll have to wait until mon. to call them.

One more question for everyone:
Is it o.k. to mix 2 different sizes of batteries. My original external box will only hold up to a 27 series, but I have room to add a 29 series inside with the ventilated box. I'll be buying both new since my old battery needs replaced anyway. Is there any issue with the 27 series having a slightly lower cca that it might wear down the bigger battery in much the same way that an older battery could if it were mixed with a new one?
I appreciate the advise, just finding this box will save a lot.
Charlie
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Old 04-28-2007, 07:16 AM   #28
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You can buy a larger box from PPL. According to the listed dimensions it will hold a BCI# 29.

I'm not sure I would use a 29 in combination with a 27. If you got the batteries at the same time from the same manufacturer, they might work together ok.

Or they might not. The gain in CCA with the larger battery might not be worth the hassle factor. I would go with a matched pair of 27s.
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