Of this package price, a powerful inverter and 18 pieces 425 N-series solar panelsSolis Inverter are safe: Its housing class is IP66 and AFCI protection reduces the risk of fire. Remote update and management is possible through reskistering in SolisClud.Experiential maximum efficiency 98.7% current up to 16Break voltage range and low start voltage factory guarantee 10 years compact and easy to install and maintain> 150% DC/AC ratio support high power modules with lower installation costs