A: With the increasing pursuit of power generation efficiency of photovoltaic power station, the voltage on the DC side of photovoltaic power station has been gradually raised. In the early stage, the maximum DC voltage of 600V inverter has been replaced by 1000V voltage, and even raised to 1100V. There is no doubt that the high voltage on the DC side of the photovoltaic system will reduce the line loss and improve the system efficiency. Therefore, the current 1100 system scheme has become the first choice for large-scale photovoltaic power stations. We believe that most of the distributed photovoltaic power stations are household photovoltaic or photovoltaic power stations installed on the roofs of various buildings. They are closer to people's daily life. They are usually connected to the user side power grid with low access voltage. In addition to pursuing the power generation efficiency of photovoltaic power station, the more important thing is safety. The system scheme below 1100V shall be adopted as far as possible. High efficiency inverter with low starting voltage and wide MPPT range shall be selected.