Central inverters and string inverters have been widely used as mainstreams in utility power plants and distributed power plants. Many may ask: which one is better? Actually, this is a false proposition because each has its merits. Historically, central inverters have been used in utility-scale projects. The larger unit power leads to less equipment, which can cut system costs down and make installation and operation easy. By contrast, the string inverters are mainly utilized in complex terrain due to smaller unit power and more MPPT’s.