We are responsbile for the AC side of this PV installation. From ( 2 ) 100KW inverters we are providing overcurrent protection at 150A ea. from ( 1 ) 300A MLO load center on roof which is being fed to MSB. We are providing a 300A overcurrent device at main switch board. We sized our conductors at 125% of output rating of inverters. We determined conductor size to be ( 350 MCM Cu). This is a 480V, 3 phase system. Is this correct ? We are being instructed by the electrical inspector to refer to NEC article 705.12 D2. Inspector is stating that we need to add the sum of all over current devices and rate our buss bars and conductors at 600A instead of the 300A that we calculated. Please advise.