20' Sea Container = 33.2 CU M. / 1,173 cu ft.
net weight capacity = 28,500 kgs / 62,280 lbs.
Just a quick ponderance without serious math. IF a 280AH cell = 5kgs, then the weight capacity can take 5700 cells OR $ 473,043.00 (cell price at 82.99) + SHIPPING Duties & Taxes. Not likely that 5700 cells would fit in the 20' sea can with packing, boxing & palletizing. Imagine the possibilities!
If you were gonna drop that kinda coin, it would be straight from the manufacturer - no vendors, heck, you likely could get a terrific deal on BMS, & Casing and voila, be another Battleborn.... hahahaha.... well not really... but dreaming is ok.