The fully autonomous robot of Kwunphi can solve the problem of cleaning the edges of solar arrays, including high and difficult to reach positions, through high-precision visual positioning technology. The robot can ensure that each solar panel is cleaned to 100 %, paying special attention to the edges of the array to ensure consistency in cleaning. Kwunphi has broken through the blind spots of remote control, achieving fully autonomous operation and easy cleaning of various difficult positions without the need for manual observation from below. High precision positioning technology enables robots to accurately reach any position, solving the problem of inaccurate human eye judgment. The cleaning effect of Kwunphi is significant. Compared with other equipment and labor, the annual power generation has increased by 10 %, while other equipment and labor can only increase by 4 % and 3 %.