Originally Posted by Seevee
Why is 6v batteries in series to make 12v so common? Why wouldn't one just get a 12v to start with, half the space... what am I missing?
Golf cart batteries are one of the best deep cycle alternatives available. They are designed for incredibly demanding use. A golf course will charge the batteries up overnight, then they get run during the day until almost dead, then get recharged again. These batteries are designed to take that abuse. They are also relatively plentiful and inexpensive. So they often are the best value per Ah compared to other types of batteries. There is no advantage to 6v, it is just that these batteries are only available in 6v.