Some very interesting observations here. I like the idea of monitoring amp hours continuously -- if I were to do this test often, I would get that little monitor.
I also understand how a low draw of 6 amps would lead to an apparent capacity of more than 110 amp hours, if the rating is derived from a 9 amp draw. The faster the draw, the lower the total capacity, or so I have been told.
But the good news is that in real world usage, I am rarely drawing 6 amps -- usually much, much less. So that must mean that my working capacity while camping is pretty darn good.
As to the voltage when fully charged, this is my third set of marine deep cycle batteries in eleven years of camping. In every case, it reads around 13.5 while charging. When I unhook from the charger, it reads around 12.9. After a day of sitting around, the batteries are at 12.7. This is true when they are new and when they are well-used. Maybe that is not typical of what others are experiencing, but I can tell you that based on a small sample of six batteries, that is what the numbers say.
