Usually, a normal country house might require a 2 to 5KW PV system, which will be well enough to satisfy what they need. On the contrary, a commercial building or an industrial factory might require high volume electricity, hence only 3 Phase 10 to 100KW PV system might meet their satisfactory.
 
Equipped with Maximum Power Point Tracking(MPPT) function, the PV inverter may gain a maximum power output. Owing to the PV inverter is shunt connected to Utility, the grid-connected PV Inverter shall provide a complete safety protection, such as anti-islanding, of which function may trip quickly if any Utility fault occurs.
When Utility recovers, it may automatically return to normal operation.