How to build a LiFePo4 battery bank.

so got a call yesterday, my buddy just placed an order for sixteen 280AH cells. if the price he paid keeps falling or stays the same I'll probably put my order in around end of july/aug. For his system we are building four seperat 12V batteries using the overkill BMS which will give us a total amp draw capibility of 480Amps if he needs it. he also wants to take the propain furnace and such out and go to a heat exchange system incase anyone is wondering why he wants 1120 usable AH. he has also suckered me into helping him put a bunch of solar panels on the roof, I should have let the phone ring ;)

Steve