landyacht318 wrote:
Now, it is no secret that the group 24/27/31 sizes are not built anywhere nearly as burly as the T-105's.
It's probably not correct to take that statement at face value without supporting qualifiers.
Comparing equivalent volumetric sizes of true deep cycle Group 24/27/31 12 volt batteries to true deep cycle Golf Cart 6 volt batteries might reveal that:
Since an equivalent case-volume size 12 volt battery has to supply only 1/2 the current per cell that an equivalent case-volume size 6 volt battery does per cell, the 12 volt version can, and must, be built with less density per cell (12 volt = 6 skinny cells, 6 volt = 3 fat cells). HOWEVER, the less dense per cell 12 volt version will last the same length of time as the more dense per cell 6 volt version because the 12 volt version consumes itself, over time, only one-half as fast due to supplying only one-half of the current per cell on average over time.
I'm talking grass roots basics here - which are difficult for us to prove or take advantage of because finding a non-AGM 12 volt equivalent to the common non-AGM T-105 is so difficult. It would be necessary to step into the AGM battery world - in order to compare 6 volt and 12 volt deep cycle version lifetimes - so as to demonstrate equivalency of 6 low-burliness cells supplying one-half the current (per cell) to 3 high-burliness cells supplying twice the current (per cell).
