Thermal energy storage plays a crucial role in the application of renewable energy sources, and it contributes to the reduction of global CO emissions. Thermal energy storage is commonly based on sensible- or latent-heat-storage techniques. Latent-heat thermal storage is based on the absorption or release of heat when a storage material is changing phase. The thermal storage materials suitable for latent-heat storage are called Phase-Change Materials (PCMs). PCMs have considerably higher thermal-energy-storage densities and can absorb large quantities of energy in a small range of temperatures during the phase change. The present work investigates, the thermal performance of Sensible heat storage materials (Gravel and Granite) and phase change materials (Paraffin wax and MnCl .4H2O). A Series of charging (Storing heat) and Discharging (Process of heat loss) processes are conducted to examine each material's thermal energy storage capacity. The significance of time-wise variation of Sensible Heat Storage Materials (SHS) and Phase Change Materials (PCM) temperatures during the discharging process was studied and analyzed.