... ROHS4.Solar energy system30W Portable Solar Energy Systemhis solar power system includes Solar cell modules, special solar battery, solar controller, ... with low Failure Rate , easily assembling and carring, convenient using,Its llifespan can reach above 20 years, a variety of ... power, such as voltage in 220V 50Hz)Characteristics: The system has high conversion of silicon solar panel, high euphotic rate ...