Is there any benefit to using 6 volt batteries instead of 12 volt?

Re: Is there any benefit to using 6 volt batteries instead of 12 volt?

I agree, go all series if you can. The 6 volt batteries usually have about twice the amp rating of 12 volt batteries (the individual cells are physically twice as large), so you'll get twice the available wattage from the 6 volt batteries in series. Always think watts when you start comparing total battery bank size and are comparing different voltage batteries. When adding batteries in series, the amps stay the same, the voltage increases.

12 volt batteries = 110 amps each ; 6 volt batteries = 220 amps each (in general)

So when using 12 volt batteries you'll need two batteries to get to 24 volts, @ 110 amps. 110 amps times 24 volts = 2640 watts (really 1320 at 50% depth of discharge). When using 6 volt batteries you'll need four batteries, @ 220 amps. 220 amps times 24 volts = 5280 watts (really 2640 at 50% depth of discharge). To match this battery size with 12 volt batteries you'll need to parallel another string which should be avoided since you can do the same thing with one string using 6 volt batteries.