Micro-inverters generally refer to inverters with a power level of 1000 watts or less in a photovoltaic power generation system, with module-level MPPT, and their full names are miniature photovoltaic grid-connected inverters. "Miniature" is relative to traditional centralized inverters. The traditional photovoltaic inverter method is to connect all the DC power generated by the photovoltaic cells under the sunlight in series and parallel together, and then invert the DC power into AC power through an inverter to connect to the power grid; the micro-inverter is used for each component Perform the inverter. Its advantage is that it can perform independent MPPT control on each component, which can greatly improve the overall efficiency. At the same time, it can also avoid the DC high voltage, poor light effect, and barrel effect of centralized inverters.