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Old 02-20-2016, 08:56 PM   #1
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Trying to figure out 6 volt batteries

Trying to figure out 6 volt batteries. Would like to upgrade to 2- 6 volt batteries to get more off Generator TV time at non hook up sites. Having a hard time shopping for them. I understand I'm looking for " golf cart " batteries but any other ways to do research or recommendation on places to purchase. Also any opinions on if this is a good way to go. Right now I have 2-12 volts on a Rockwood 2604ws
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Old 02-20-2016, 09:26 PM   #2
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Check out the 12 Volt Side of Life.
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Old 02-20-2016, 09:34 PM   #3
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Check out the 12 Volt Side of Life.

X2 on the 12 volt side of life, part 1 and 2


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Old 02-20-2016, 11:20 PM   #4
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Napa and Costco are a couple places to purchase them.

Here is a link to a lot of resources for you.

https://www.google.ca/?gfe_rd=cr&ei=...+cycle+battery
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Old 02-21-2016, 12:52 AM   #5
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X 3 on 12volt side of life...... Handy Bob's blog is another Handybobsolar.wordpress.com.
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Old 02-21-2016, 05:51 AM   #6
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Not really that complicated. A couple of Trojan T0105s or equivalent. Get the biggest 6 volt batteries that will fit where the 12V units are. Connect them in series and you are off. T-105s are the industry standard. If you need help on series connections you can find it anywhere. 2 6 volt units in series will give you more capacity than the 2 -12s that you have.
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Old 02-21-2016, 08:51 AM   #7
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I particularly like 12 volt deep cycle batteries like these: http://www.batteriesinaflash.com/dee...130ah-group-30

The reason is that if a 6 volt battery should fail due to a cracked plate or other internal problem, your camping trip is over.

With 12 volt deep cycles, a minute with a wrench and you are back in business.

Remember when shopping two 12 volt batteries doubles Amp Hours and two 6 volt batteries doubles voltage (but not amp hours).

IE:

2 - 130 AH 12 Volt Batteries equals 12 volts at 260AH

2 - 232 AH 6 Volt Batteries equals 12 volts at 232 AH

Be sure to follow the correct wiring when connecting battery banks for even charging and discharging. Many manufacturers get it wrong.
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Old 02-21-2016, 09:19 AM   #8
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I had dual 12volts. I have proven the hard way that it's a nice fable to think you will be able to take the bad battery out of the circuit and limp along on the good one.

Real life experience is that when one goes bad, you won't know until the good one has mostly discharged itself into the bad one.

The other issue with dual 12V (which I also found out the hard way) is that if the two batteries have significantly different charge states when you connect them together, the current flow between the two batteries in parallel is enough to melt cables and start electrical fires. I'm very glad the batteries were mounted on the tongue.

I have since switched to dual 6V golf cart batteries in the same box. Gives me more capacity (232 AH) and less worries. I bought mine from Costco (Costco-branded batteries rated highly in Consumer Reports) - $150 for both, including tax.

With our style of camping, loss of battery does not necessarily end the trip. The biggest loss would be the heater. We have flashlights, and fridge does not use 12V. Water would be awkward, but we carried water when we tent camped. But our longest camping trips are only a week now anyway.

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Old 02-21-2016, 09:46 AM   #9
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Real life experience is that when one goes bad, you won't know until the good one has mostly discharged itself into the bad one.
This is certainly one failure mode that could occur. However, you might still be able to determine which battery failed and attempt a recharge of the good (but discharged) one.

The shorted one will not be allowed to connect to the converter due to internal protections in the converter. The good one should (after a few minutes of rest to recover - equalize - internal charge after being removed from the bad companion battery). The fan ginning up when connected will show a charge being sent to the depleted battery.

Remember that due to the Peukert Effect, high amp demand will crash battery voltage due to the inability of deep cycle batteries to deliver electrons from deep storage fast enough to keep up. Since a shorted battery's voltage is less than 10 volts, you would notice the failure pretty quickly once AC was removed or the amp draw dropped the "good" battery voltage below 10-11 volts.
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Old 02-21-2016, 12:11 PM   #10
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Actually, I think the fridge does use a small amount of 12v even when running on propane.
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