Measuring Solar Cell Efficiency: A Comparative Study of Energy Conversion Efficiency of Solar Cells of the Solar Electric Vehicle, STC-3 at the World Solar Challenge in Australia and at Test Drives on Sathorn Road in Bangkok, Thailand

This paper presents the results of experimental test drives of the solar electric vehicle, STC3 which had previously competed in a race at the 2019 World Solar Challenge in Australia on clear-weather highways with high light intensity, as to compare its solar cell efficiency with when the car was driven in test drives on the public road of Sathorn Road in Bangkok, Thailand, in the rainy season with cloudy conditions and with tall buildings along the driving route. The study compares the energy conversion efficiency of the STC3's solar cells in different climates and environments to determine whether the solar car is suitable for everyday use in Thailand. The study considers the electrical power output from the solar cells in comparison with the maximum electrical power that the solar cells can produce.