I would say it a little differently. I would go for 2x 16s5p, each system feeding two inverters. You could put a paralleling switch, but that is really dangerous. (But if it was me, I would actually do 4x16s2p and save a little money.)I would avoid this configuration completely. 16S10P 16 48 volt batteries with individual cell protection, each battery with its own fuse protection all feeding common power buss. Have physical separation between batteries to avoid losses in a failure of a cell.
With a single bus, generally you would design the busbars so that you mix sources and loads along the length-- in the 16s10p scenario you would have:
[ Batt1 - Batt2 - SCC1 - Inv1 - Batt3 - Batt4 - SCC2 - Inv2 - Batt5 - Batt6 - SCC3 - Inv3 - Batt7 - Batt8 - SCC4 - Inv4 - Batt9 - Batt10 ]
With that connection scheme I would design the busbar for 4x your battery string fusing. (I would fuse the battery strings at 150A personally.) Assume 1 square inch of copper = 1,000A, so about 2.5x0.25".