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smiller · 12-30-2011, 07:06 AM

To answer the original question, there is no inherent superiority in two six volt batteries in series over a '12 volt' battery as all lead acid batteries are a combination of multiple 2.1 volt cells in series. However, the 6-volt batteries commonly referred to for RV use (aka 'golf cart' batteries) are of a heavy-duty deep-cycle design that is lacking in many 12-volt alternatives, thus two 6-volt batteries of that type might well be a better choice than a lesser 12-volt battery. But the advantage is due to the difference in construction of the batteries themselves, not their design voltage.

12-30-2011, 07:06 AM	#7
smiller Senior Member Join Date: May 2011 Location: Full-timing Posts: 447	To answer the original question, there is no inherent superiority in two six volt batteries in series over a '12 volt' battery as all lead acid batteries are a combination of multiple 2.1 volt cells in series. However, the 6-volt batteries commonly referred to for RV use (aka 'golf cart' batteries) are of a heavy-duty deep-cycle design that is lacking in many 12-volt alternatives, thus two 6-volt batteries of that type might well be a better choice than a lesser 12-volt battery. But the advantage is due to the difference in construction of the batteries themselves, not their design voltage.