... a variety of charging ways complementary, solar ,Ac and Dc all can charge for the system, one time investment, long-term benefits ... music CDS, DVDS, electric power, such as voltage in 220V 50Hz)Characteristics: The system has high conversion of silicon solar panel, high ... , electric power whose voltage is in 50Hz,220V, Design and manufacture as the small AC/DC power supply system, for farmers in ...