Enlarging solar power plants are increasing. This increase is to reduce compatibility with the use of fossil fuel electricity. Utilization of solar power plants is mostly used for street lighting and home industries. Solar power plants must rely on solar irradiation received on solar panels. The output power is also changed by large values from external factors such as partial shading. Partial shading is a condition that is closed / blocked by some cells in the solar panel. The application of partial shading is mostly only used with simulation software. However, in this final project research is carried out the implementation of partial shading and analysis to determine the effect on the output power that occurs in solar panels in actual environmental conditions. The application is made to know the output power during normal and partial shading conditions and to know the partial effect on the solar panel output power. The maximum value of the power produced in solar panels is 298.50 W. The maximum power value that can be obtained when a partial shade occurs is 141.13 W and the partial shade that occurs in the solar panel causes the power to increase under normal conditions.