Characterizes the ability of the inverter to carry inductive or capacitive loads. The load power factor of sine wave inverters is 0.7 to 0.9, and the rating is 0.9. In the case of a certain load power, if the power factor of the inverter is low, the required capacity of the inverter will increase the cost. At the same time, the apparent power of the AC circuit of the photovoltaic system increases, the circuit current increases, the loss will increase, and the system efficiency will be reduced.