I have not heard of anyone having trouble with the three 12 volt batteries in a Glacier. A standard 12 volt group 27 deep cycle battery would have 100 amp hour at the 20 hour rate. A standard (if there is such a thing) 6 volt deep cycle golf cart battery would have 225 amp hours. There are deep cycle 6 volt batteries that have considerably more amp hours than 225, but they would be very large and heavy. Some AGM 12 volt deep cycle batteries have slighty less than 100 amp hours. As a general rule, three group 27 12 volt batteries wired in parallel would have considerably more amp hours than two 6 volt golf cart deep cycle batteries wired as one 12 volt battery. However, as stated, there are exceptions to this statement. For a long service life, it is desirable to have a smart three stage battery charger that is temperature compensated.
