The solar heat absorbed by the solar module can raise the temperature and lower its output voltage. Efforts are needed to lower the temperature of the solar module so that it is in standard condition so that its performance remains optimal. The installation of heat-absorbing materials in the form of thermoelectrics is used as an effort to cool the solar module. Thermoelectric is able to reduce the average temperature of solar modules by 7.24C and increase the average output voltage of solar modules with a difference of up to 3.65 Volts. This condition can be seen from the average Voc output voltage of solar modules added by thermoelectric can reach 18.22 Volts compared to those without thermoelectric additions of 14.57 Volts. The results of the study can be concluded that the addition of thermoelectric heat-absorbing materials is more effective for lowering the temperature of solar modules than without the use of thermoelectric.