THe fact is folks look for 12 volt "Group" (24/27/29/31) batteries and for the most part they have never been True Deep Cycle long as I can remember.
GC-2 ARE True deep cycle.. These are six volt batteries when you buy 'em so you buy 'em in pairs and wire them in series 220 amp hours (C/20 rate) at 12 volt when wired in series (give or take a few amp hour) (There are not six volt batteries 9in RV's. only 12 volt that sometimes come in two halves.. Think about it a while and it makes sense)
Or you can get CG-12. These are 12 volt.. as I recall about 125 amp hours at 12 volt each Wire 'em up just like your Group 27s
Where to get GC-Batteries? Well GC stands for GOLF CAR so..
