profdant139 wrote:
So this means that after ten hours of actual run-time (consuming 61 amp hours), the battery got down to 12.2 volts, i.e., with 60 percent of capacity still remaining. It looks like I could have gone two more hours to get to 12.1, for a total working capacity of 67 amp hours.
That is a lot better than the 55 amp hours of working capacity than I was expecting!
I did this experiment twice, once with each battery, and got exactly the same results. This tells me that this wasn't a fluke.
I am not sure how it is possible that my batteries are outperforming their rated capacity, but I'm not complaining. This won't change my consumption patterns when we are camping – we are very careful about electricity. But this is encouraging news, and it gives me a baseline for subsequent comparisons.
Well the reason is simple. Your 110 AH rated battery is likely rated at the C20 rate. This means that the battery amps pulled were in the 9ish rate. The more amps you pull from a battery the more heat (waste) happens. So the lower the amps pulled, the more amp hours you will get.
