Photovoltaic inverters generally include power station type photovoltaic inverters, string type photovoltaic inverters, and micro inverters. A power station type photovoltaic inverter with a power range of 30KW-1000KW or even larger. Mainly used in large commercial roofs, industrial factories, and large ground photovoltaic power plants. The power station type photovoltaic inverter mainly adopts a three-phase bridge circuit topology, and includes two types: transformer free and transformer equipped.
String type photovoltaic inverter, with a power range of 1KW-30KW, mainly used for residential roofs and some small commercial roofs. The single-phase products of the string type photovoltaic inverter mainly consist of a boost circuit and a single-phase transformer free topology, while the three-phase products mainly consist of a boost circuit and a three-phase three-level transformer free topology.
The power of the micro inverter is between 200W-500W, mainly used in curtain walls, window sills, and small roofs. Micro inverters can be paired with a single component structure to track the maximum output power of each component separately, achieving performance optimization. In addition, it can also improve shading issues, improve the efficiency and reliability of solar photovoltaic systems.