In the traditional PV system, the DC input of each series inverter is connected by about 10 photovoltaic panels in series. If one of the 10 panels in a series doesn't work well, the whole string will suffer. If the inverter multiple inputs use the same MPPT, then all inputs will be affected, greatly reducing the power generation efficiency. In practice, clouds, trees, chimneys, animals, dust, snow and other shielding factors can cause these factors, which is very common. In the PV system of micro inverter, each panel is connected to a micro inverter respectively. When one of the battery panels does not work well, only this one will be affected. Other photovoltaic panels will operate at their best, resulting in higher overall efficiency and greater power generation. In practice, if the series inverter failure, will cause a few kilowatts of panels can not play a role, but the impact of micro-inverter failure is quite small.