SoonerWing03 wrote:
I just removed a single Marine style 12V battery in favor of two 6V G2 Golf Cart batteries. My understanding is that is an upgrade but a good example of how good of a grasp on this is that I was shocked when I got to Sams to purchase said 6V batteries and to my surprise they were roughly the same size as the 12V :h
A 6 volt GC-2 battery has a similar footprint to a 12 volt Group 24 battery but is about an inch taller. A 12 volt Group 27 will be about the same height and width as a Group 24 but is longer. Same for a Group 31, just even longer than a Group 27. What is best for your application depends on how you intend to use your batteries and the physical space you have for mounting them. As for the "anti 12 volters" don't let them kid you - a pair of Group 31 12 volt batts wired in parallel will offer about the same reserve capacity as a pair of 6 volt GC-2 batts wired in series. Oft times one is better off with a pair of 12 volters rather than the usually recommended 6 volters because the former will offer significantly lower internal resistance and thus suffer less voltage drop under heavy load from an inverter trying to meet that load. The same can generally be said for AGM vs flooded, the former having much lower internal resistance and therefore more likely to power a large inverter under heavy load with less voltage drop and thus less likely for the inverter to alarm or even shut down from excessive voltage drop.
