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Old 12-05-2012, 03:32 AM   #1
illapah
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6 Volt Batteries

Just wondering what makes 2 6V batteries better than 2 12V batteries?
 
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Old 12-05-2012, 04:02 AM   #2
Bigboomer
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quote:Originally posted by illapah

Just wondering what makes 2 6V batteries better than 2 12V batteries?
Well that depends on what you are looking for, more amp hours or longer life with more discharge capability.

Most 6 volt golf cart batteries give you greater deep cycle charging and will last longer than a 12 volt hybrid (RV/Marine) battery.

When installing two 6 volt batteries wired in series the amp hours remain the same and the voltage is doubled. Example: Two 200 amp hour 6 volt batteries wired in series equals one 12 volt 200 amp hour battery.

When working with two 12 volt batteries wired in parallel the voltage remains the same and amp hours are doubled. Example: Two 100 amp hour 12 volt batteries wired in parallel, makes one 12 volt 200 amp hour battery bank.

But you also consider size as 2 - 6volt batteries will take less room than the 2 - 12 volts.

Unless you are setting up a solar system you are probably better off with the 2 - 12 volts as you will get more battery time for boondocking, etc.

Hope this helps.

Les
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Old 12-05-2012, 04:37 AM   #3
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X2. We're not going solar anytime soon so we went with the two 12's. By the time we may be able to afford solar we'll need to replace them anyway.
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Old 12-05-2012, 05:15 AM   #4
HamRad
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quote:Originally posted by illapah

Just wondering what makes 2 6V batteries better than 2 12V batteries?
Amount of lead. The more lead the more storage capability. At least that is what I've read. Good luck. HamRad
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Old 12-05-2012, 06:06 AM   #5
DonandJudy_12
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I'm with Hamrad on this issue- JMHO- Don
Quote:
quote:Originally posted by HamRad

Quote:
quote:Originally posted by illapah

Just wondering what makes 2 6V batteries better than 2 12V batteries?
Amount of lead. The more lead the more storage capability. At least that is what I've read. Good luck. HamRad
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Old 12-05-2012, 06:28 AM   #6
kylec2
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The major advantage of two 6 volt batteries versus two 12 volt batteries is efficiency:

Two 6 volt batteries wired in series ensures the pair will always operate in tandem, which is to say the current flowing through the two batteries is equal. Any impairments affecting current flow (corrosion, resistance, etc.) affect both batteries equally.

In the case of two 12 volt batteries wired in parallel the current in theory is divided between the two batteries equally. The problem arises that theory does not match reality with a pair of 12 volt batteries and due to battery dynamics and differences in resistances between the two paths (often caused by corrosion, wire length, or resistance caused by quality of the connection) one battery will work harder than the other. The two 12 volt battery configuration can result in shorter battery life as the harder working battery ages faster.

The issues in using a pair of 12 volt batteries can be minimized by ensuring good quality connections, matched wire lengths (+ to + and - to -), and keep terminals clean.
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