12 volt system - Fiberglass RV


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Old 12-17-2017, 02:52 PM   #1
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12 volt system

I am restoring a 1977 13 ft scamp with no 12 volt system. I need a little help installing the system and is there any problem with having the 12 volt battery inside the trailer?
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Old 12-17-2017, 03:17 PM   #2
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You'll want to ask specific questions for wiring.

Any kind of battery is fine inside the camper, but some (like the typical lead acid) will need to be sealed and vented.
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Old 12-17-2017, 03:38 PM   #3
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Our batteries are in this box and there is a vent hose to exterior. Lid is sealed at wiring points with putty. They are lead acid.
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Old 12-17-2017, 04:11 PM   #4
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If I was doing it or it was mine I would put the battery out in front behind the propane tank is the way I see most of them done. much easier to look after that way!


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Old 12-17-2017, 04:31 PM   #5
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The problem with installing the battery on the tongue, along with the propane tank, is that most tongues are too short to begin with. This means you may not be able to open the tailgate of the TV when hooked up, it may interfere with the jack and the tongue weight goes up.

The battery is easy to service while on the tongue, but the weight distribution is better if it's mounted out of the way near the axle.
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Old 12-17-2017, 05:18 PM   #6
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The problem with installing the battery on the tongue, along with the propane tank, is that most tongues are too short to begin with. This means you may not be able to open the tailgate of the TV when hooked up, it may interfere with the jack and the tongue weight goes up.

The battery is easy to service while on the tongue, but the weight distribution is better if it's mounted out of the way near the axle.

My battery and propane tank are both mounted on the 3' tongue. I have no trouble opening the tail gate of my Dakota when connected.
I see very little need to open the tailgate when connected if any. When camping I always unhook.
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Old 12-17-2017, 05:20 PM   #7
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12 volt system

For a 13' molded trailer, I personally prefer the battery on the tongue. It preserves limited inside storage for other stuff and eliminates the need for a vent hole in the shell.

Tongue weight is usually not a problem, and my tailgate opens up and out of the way.

YMMV...
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Old 12-17-2017, 06:59 PM   #8
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I see very little need to open the tailgate when connected if any. When camping I always unhook.

Very little need? I open mine all the time while traveling to load groceries, ice or just get something out. My Oliver is the first trailer I've had that has no interference with the tailgate. All the blocks are stored in the truck and they have to come out to unhook. If I just stop for the night I'll likely not unhook, but I can still access everything easily in the truck by dropping the tailgate. I don't want to unhook just to gain access to the ice chest, or the gas can, for instance.

Another issue is the number of batteries. One is fine, or even two, on the tongue. But if someone wants four batteries, (I have four T105 6 volt) the tongue becomes a real problem.
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Old 12-17-2017, 08:33 PM   #9
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battery

my tongue weight with 1 battery 1 propane tank 100lb I suppose you could mount 4 out there and still be ok. you can always get to your battery if its outside and as jon says you gain valuable inside room.

for a 13f I will never need more than one battery.

to each his own I guess

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Old 12-18-2017, 04:43 AM   #10
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Most detectors are hardwired i.e.always on. That can cause a spark when disconnecting. Even though a gas build up is less likely with the battery on the tongue I still have way to disconnect. In my case I remove the inline fuse.
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Old 12-18-2017, 04:56 AM   #11
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my tongue weight with 1 battery 1 propane tank 100lb I suppose you could mount 4 out there and still be ok. you can always get to your battery if its outside and as jon says you gain valuable inside room.

for a 13f I will never need more than one battery.

to each his own I guess

bob
Mine came with the battery under the bench seat in back but I keep my table in the Bed mode all the time so I did more the battery to the tongue.
I too was concerned about weight but I figured if I kept the battery closer to the hitch way up front there would be less strain on the critical part of the Boler frame, where it bends under the very front of fiberglass.
I mounted a regular battery box with holes in plastic box and U-bolts around the frame. I did have to run a few heavy wires from front to the converter but it was well worth it. I can take battery out when need be or fill with water easy as pie.
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Old 12-18-2017, 05:24 AM   #12
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struggle

looking at my 13f scamper inside what a job to put the battery inside then the struggle to get to it to check it. at 75 with big-time back surgery I am not up to it.

I doubt if I would do it anyway for reasons stated. my 12v circuit wire off the battery is very light I don't think scamper intended to much amp draw in use off that battery.

I look at 12v things all I have going is some lights, a water pump disconnected so I see no advantage in my case.

now if you go to an inverter a big 12v waste in my opinion then go with a big bank! in my busing days I would read posts of people thinking with a huge bank the sort you would need a trailer to pull it to run a fridge and a/c.

sorry simply impossible!! not to ruffle feathers here but some things and ideas will not cut it off 12v.

bob

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Old 12-18-2017, 10:40 AM   #13
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I use a jack-E-Up. Like its. I also have the tailgate down when hooked up, upon occasion. My Casita has the battery is in a compartment near the rear bumper. I would prefer that it be on the tongue outside.
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Old 12-18-2017, 11:21 AM   #14
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Lead-acid batteries vent hydrogen when they cycle. Hydrogen is a very explosive gas. Even a small spark could cause a massive explosion. I've seen it happen twice. That's why lead-acid batteries are mounted outside on the tongue, to allow proper venting so the hydrogen gas doesn't accumulate. Even in a sealed battery box with venting to the outside, hydrogen gas can be a problem.
If you want to mount your battery inside your unit you should consider another type of battery.
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