I've done a 3x Multiplus II 5000 set up in a 3 phase configuration and noticed that when the system is set to TOTAL OF ALL PHASES in Multiphase Regulation it will balance the phases to near 0w as far possible by feeding into the grid on L1 the same as it would pull on L2 and L3. But this is not ideal if the grid meter is prepaid as the meter would charge you units for what u are pushing back. If I set it to INDIVIDUAL PHASE it only seems to feed PV into L1 and L2 and L3 dont get any PV benefit. The system consists of: 3x Multiplus II 5000, 2x Smartsolar 150/85, 14kwh Li-ion, and 8.9kwp Solar PV. What am I doing wrong or might it be better to set the 3 inverters up as a parallel system on L1 and put all my heavy loads on L1 if the system is not capable of supplying all 3 phases individually? 
