2 12 volt batterys or 2 6 volt
what gives me the most bang for my money. every other rig that I have bought always had 6 volt battery's but the new one has 2 12 volt. not sure what works better.
Forum Discussion
pnichols wrote:
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Probably total internal intrinsic resistance of the battery bank has a lot to do with the amount of voltage sag under heavy current loads.
Too bad that value is not readily available for batteries. Maybe lifetime # cycles to 50% might be as close a correlate as we can get from the spec sheets. But even there, I don't see it often reported for the "marine/rv" types, just the C.A. and C.C.A.
I wonder what setup has the lower total internal resistance ... two GC 6 volters in series or two deep cycle 12 volters in parallel? (Apples-to-Apples assuming that all batteries are flooded or all batteries are AGM.)
You are thinking that in the parallel configuration the resistance is halved, while it is doubled in the series config, like ordinary resistive components? No idea whether that holds true with batteries but it would nice if it did.
I do find the "12V deep cycle" language confusing.
According to Trojan, their T-1275 is a "12V Deep-Cycle Battery", and the SCS225 is a "12V Marine/RV Deep-Cycle Battery". I guess you are referring to the former
