5KW residential distributed project was found in Australia to facilitate the user’s daily electricity needs, but to some extent, it also has an increase of additional income. The project mainly uses a set of BG 5KW string single-phase inverter of INVT Solar. This inverter is made of all-aluminum design case, which not only meets the aesthetic requirements of the household, but also ensures the normal heat dissipation of the product. Its life expectancy is much longer than other inverters. It has an ultra-wide voltage range and the low starting voltage.