Design and application of new electricity complementary PV solar system

New electricity complementary photovoltaic system adopts a design scheme which is different from the traditional electric complementary photovoltaic system to solve the problems in the traditional system of being easy to damage,difficult to repair,and abnormal to supply power in continuous overcast and rainy days. New electricity complementary photovoltaic system can switch between electric power and photovoltaic power in accordance with the actual needs of load power,in which the battery is fully charged and maintained. The system can not only work more reliably,but also reduce the battery replacement frequency,the dosage of the battery,and the investment cost.