The usage of renewable energy is increasing in many countries, Indonesia included. This spike of interest is supported by its environmental-friendly nature and the fact that it is one of the most effective ways to combat global warming. Solar power plants are electricity generators with the ability to convert solar energy to electricity by using solar panels. However, solar power plants are indubitably dependent on solar energy, which can cause a fluctuation of output because solar energy is affected by weather and the cloud's condition. Generally, solar power plants have a power electronics component called an inverter. Inverters are used to convert the output of solar panels, the direct current (DC), to alternating current (AC). The usage of power electronics such as inverters plus the fluctuation of the solar panel commonly cause disturbances. Inverters usually have a switching rate higher than 1 kHz, which can cause disturbance in the range of 9-150 kHz throughout the whole system. However, there is little to none standardization regarding how much emission it is allowed to radiate at the 9-150Khz. With the aforementioned concerns in mind, this writing discusses research regarding the characteristics of disturbance on the 9-150Khz frequency on the On-Grid solar power plants located at a gas station. Measurement is done on the output side of the solar inverter. The result of the research shows that the disturbance produced remains constant in correlation with changes in power, however the disturbance produced increases as the power output drops or rises during a short interval.