Each 1s6p Nese module dimensions are: 140.7 × 80 × 23.5 mm
My box’s INTERNAL dimensions are 235mm x 170mm x 95mm.
My 11+1s 7p battery brick really had to get squeezed in to fit. Shouldn’t be an issue with any 12s4p battery I think, as long as the parallel rows are staggered in a hex-shape.