PianoTuna, thanks for the detailed explanation. This makes me wonder if I would even be able to run a microwave for a few minutes with 2 fully charged Lifeline gpl-31xt 12v batteries.
I really wish the LiFePo batteries were more mature(and cheaper). The reason I settled on AGM is that by the time the AGMs need to be replaced, the LiFePo batteries should be a lot cheaper and easier and also have some built in protection from trying to charge when they are too cold.