This work is dedicated to the experimental study of energy storage in a cylindrical container containing a porous medium made of Thiki terracotta in the Thiès region of Senegal. The purpose of this study is to obtain efficient performance by testing the device using different diameters of terracotta beads, resulting in porosity values of 0.55 and 0.57. The energy source consists of a thermal resistance of 180 ohms, generating a maximum power of 60 Watts. To properly conduct the experiment, we conducted thermal data measurements using 10 thermocouples connected inside the device and to the Agilent data acquisition center. The results of this experimentation shed light on the high thermal storage capacity of the porous medium formed by Thiki terracotta. Therefore, we analyzed the evolution of temperature as a function of time and the porosity of the medium. In addition to studying the thermal properties of Thiki terracotta, this research could have broader implications for the field of energy storage. The use of porous materials for energy storage has the potential to be more cost-effective and environmentally friendly compared to traditional energy storage methods, such as batteries. Additionally, the use of different bead diameters to vary porosity levels could lead to the development of more efficient and customizable energy storage devices. Overall, this study demonstrates the potential of Thiki terracotta as a high-capacity and cost-effective material for energy storage, and highlights the importance of experimental research in developing innovative solutions for energy storage and sustainability.