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Yet another battery thread
I know there are a few but let me throw one more into the mix.
My current battery set includes 4 6v golf cart batteries (Deka GC15), two each in series, then in parallel. Each battery is ratet 215 amp hours, so the total for this system is 430 AH in 12volts.
It's time to replace these things, as they don't really charge properly anymore. I priced the exact replacement and they go for $120-$140 each.
At the same time, regular deep cycle group 27 12v batteries sell for $80 or so. They presumably have 110AH, so if I connect them in parallel - I should get 440AH for a price that's about half of what I'd pay for the current setup. They are slightly longer, but I should be able to accomodate that (or go a size smaller to 4 group 24, though total hours would be reduced to about 360AH).
Is there any specific drawbacks to using 4 12v batteries that way? Am I missing a particular reason these are so much cheaper?