From the perspective of the scheme, the photovoltaic inverter architecture is roughly divided into micro inverters, centralized inverters and string inverters. No matter what kind of solution, product reliability, cost performance and technical support are indispensable in the process of winning customers. From the perspective of technological development trends, the power of micro-inverters continues to increase; the centralized inverter is likely to cause the entire system to be disconnected from the grid, which brings losses and risks to users. At present, the system integration mode of string inverters is more popular. Favored by the market, it is increasingly becoming the mainstream application architecture. In the design of string inverters, Littelfuse’s power MOSFETs, IGBTs, rectifier diodes, fast recovery diodes, gate drivers, TVS diodes, fuses, varistors, gas discharge tubes and many other products are all necessary in the solution. An indispensable electronic device, Littelfuse can provide high-quality products of power devices and protection devices at the same time, providing users with high power density, high reliability, and cost-effective overall solutions.