So an ardiuno wont work. Hmm. What about the gamber BMS stuff?
GamberBMS
I've been watching his stuff on youtube for a while now. Good series of videos.
Looking for a BMS to handle 18 cells is quite hard. I've been googling all evening.
-edit-
These leaf batteries are pretty awesome and they're local to me available to pickup. But with all this BMS crap, it's looking like it may be easier to go with GBS or another Lifepo4 battery.