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Old 06-08-2016, 10:17 AM   #1
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Dual Batteries

I'm new to the whole camper thing so pardon me if this is a dumb question, I have a single 12V battery now that came on my camper (29HFS). Obviously there is enough room for 2 on the battery rack. I will be mostly boondocking with this unit, hardly ever going to be hooked up, would having a 2nd battery be beneficial and how would you hook it up? I looked at some units that said they had an extra installed at the dealer. I'm only wanting it for lights, power beds, playing the radio for extended times without turning on generator for a simple radio. Any info is greatly appreciated, thank you.

Also I did some searching on this forum and couldn't find a simple setup like I'm looking to do.
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Old 06-08-2016, 10:34 AM   #2
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Here is what I did.
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Old 06-08-2016, 10:52 AM   #3
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For dual 12V batteries you connect positive to positive and negative to negative so they run in parallel and you stay at 12V.

Don't be confused by dual 6V setups which are the opposite. They run in series to double the voltage to 12V. Don't do that.
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Old 06-08-2016, 04:03 PM   #4
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Originally Posted by stevejd235 View Post
Here is what I did.
Does the converter maintain both batteries OK when hooked up to power or towing???
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Old 06-08-2016, 04:24 PM   #5
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Does the converter maintain both batteries OK when hooked up to power or towing???
NYBigDog,
I'm plugged in 95% of the time when I camp. When I check the LED panel in the bathroom it indicates I'm full charged.
I will check the batteries when I get the camper this weekend before I plug in and report back. Most likely on Saturday...FYI
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Old 06-08-2016, 04:25 PM   #6
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Yes the converter will maintain both batteries, but you need to purchase two Deep Cycle batteries of the same size, manufacture and built code.
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Old 06-08-2016, 04:29 PM   #7
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They need to be connected in a parallel configuration like MN said, here is a link on youtube .
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Old 06-08-2016, 04:33 PM   #8
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Yes it does but you want your positive from the trailer to be on one battery and the negative to go off the other battery


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Old 06-08-2016, 04:49 PM   #9
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Try to find a battery that is as close as possible to the size and capacity of the one that is already installed. It will result in the converter doing a better job of maintaining both of them. Check your battery box. Many have holes on the top for venting but no holes in the bottom to drain water that enters. If you drill holes try to find a location that will not drain on the frame.
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Old 06-08-2016, 04:50 PM   #10
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He points that out specifically in the Video.
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