The characteristic of the battery-free DC photovoltaic power generation system is that the electric load is a direct current load, and there is no requirement for the use time of the load. The load is mainly used during the day. The solar cell is directly connected to the power load. When there is sunlight, it generates electricity for the load to work, and when there is no sunlight, it stops working. The system does not require the use of a controller and no battery energy storage device.