Long-term exposure of solar cells (photovoltaic, PV) to sunlight can cause the surface temperature to rise rapidly, thereby reducing its output voltage. In order to reduce the surface temperature of the solar panel, a thermoelectric cooler (TEC) on the back of the solar panel was studied to test the effect of the solar panel on the output performance of the solar panel at different room temperature. Studies have shown that when the TEC was not included and the ambient temperature was 26 ℃, 29 ℃and 33 ℃ and the maximum output voltage of the experiment was 2.32 V, 2.25 V and 2.20 V. After loading the TEC, the maximum output voltage at 26 ℃, 29 ℃ and 33 ℃ is 2.54 V, 2.59 V and 2.47 V. The output voltage is increased by 9.4%, 15.1%, and 12.3%, respectively. Therefore, loading a TEC in a solar panel can increase the output voltage and prevent the life of the solar panel from being lowered due to an increase in temperature.