Inverter is an adjusting power device; mainly function is for converting the DC power into AC power. Generally speaking, it is composed by the boost circuit and the inverter bridge circuit. A DC boost circuit of the solar cell output voltage to the inverter DC voltage necessary for the control; inverter bridge circuit of the DC voltage boost put the equivalent converted into common frequency AC voltage. It consists of inverter bridge, power control logic and filter composed of key electronic components, and insulated gate transistors (IGBT).

　　

　　Up until now, most of international companies is through acquisitions and branched out cooperative manner into the field of micro-inverters, such as SMA acquisition OKE-Services, the U.S. Akeena Solar and Enphase has became to be partnerships, and Suntech is also through the purchase of Enphase 1NWp miniature inverter, thus providing the inverter module with a solution of the company.