6v 220AH Times 2 in Series = 12v 220AH.
12v 110AH Times 2 in || = 12v 220AH
Since 6v are usually deep cycle, they last longer and if you prefer maintenance free (AGM), they cost more.
Plus both take longer to charge with a converter. Shorter with a solar charger.
I had been looking at replacing my 1 12v 75AH with 2 6v 110AH in Series (deep cycle, agm) but now I’m thinking of a 12v Deep Cycle, agm, 110 AH as I don’t boondock ever.
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