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Old 11-04-2013, 09:58 PM   #1
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12v to 6v charging

My factory 12 volt batteries bit the dust. After a lot of research I have decided to go with 6 volt batteries instead. Not really for the cost, but I dry camp a lot since I use my camper at my hunting lease much of the year. I'll keep my existing good 12 volt battery around as a backup in case one of the 6 volts go down.

So I have a couple questions regarding charging:
1. I'm under the impression I can use the existing on-board 12 volt charger as long as I hook it up to opposite terminals on both batteries (instead of both on the same battery like the 12 volt parallel). Is that right?
2. I have a 12-Volt 20-amp solar charger that I used to leave connected to the old batteries to keep them topped off. Can I use this same system by doing the same thing - connecting it to both batteries?

I don't wanna make any assumptions...

Thanks,
Larry
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Old 11-04-2013, 10:10 PM   #2
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The batteries have to be in-series in all cases. That means positive of one connected to negative of the other, and RV connections made to the two remaining (unwired) terminals.
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Old 11-04-2013, 10:27 PM   #3
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YES. You are correct. You c an use your 12 volt charger as well as your 12 volt solar. As Barry said hook the two 6 volt batteries in series and you will have one positive terminal on one batter and the Negative will be on the other battery.
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Old 11-04-2013, 10:30 PM   #4
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X2 for Barry's hookup!

Edit: and the diagram!!

Are you sure your solar charger is 20 amps? That would cook your batteries pretty quick unless you were using that much power and it would be pretty big.

Is it maybe 2 amp instead?
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Old 11-05-2013, 08:36 AM   #5
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I'm sure it's 20-amp capacity, regulated to produce the amount of charge the batteries need.
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Old 11-05-2013, 09:01 AM   #6
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Quote:
Originally Posted by Lynkage View Post
Are you sure your solar charger is 20 amps? That would cook your batteries pretty quick unless you were using that much power and it would be pretty big.

Is it maybe 2 amp instead?
LOL, now y'all know why I'm asking!

It is 20 watt, not amp. I picked up one of these (with the controller) at Cabela's for $60 on sale last year.
Amazon.com: Sunforce 50123 20W Solar Battery Charging Kit: Automotive

I have a generator I use to charge with and this to trickle while I'm gone. I'm also considering a battery disconnect so I shut down all the drain while I'm gone for a while. Can I get one like this or is there something more specific I need?
Amazon.com: NOCO ID220S 6V-24V 125 Amp Battery Disconnect Switch: Automotive

Thanks again!
Larry
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Old 11-05-2013, 10:01 AM   #7
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Quote:
Originally Posted by BarryD0706 View Post
I'm sure it's 20-amp capacity, regulated to produce the amount of charge the batteries need.
A 20amp (2500w) solar panel would cost about 3+ grand. That is why I asked, but as we see it is a 20watt.
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Old 11-05-2013, 10:02 AM   #8
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BTW Larry

The 6v batts work really well!!
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Old 11-05-2013, 10:02 AM   #9
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A 20amp (2500w) solar panel would cost about 3+ grand. That is why I asked, but as we see it is a 20watt.
12v x 20a = 240 watts
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Old 11-05-2013, 10:25 AM   #10
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BTW Larry

The 6v batts work really well!!
That's what I hear, especially for my needs. Notice how I stuck in the "keeping my good 12v around in case" comment to try to keep this thread from spiraling out of control?
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