Latent Thermal Energy Storage (LTES) has a broader application compared to sensible heat and chemical energy due to higher energy density and energy storage and release in isothermal conditions. In this regard, the encapsulated phase change material (PCM) plays a significant role in preventing leakage and increasing heat transfer. One of the most practical examples of thermal energy storage is solar energy storage based on a fixed bed, fluidized bed, and spouted bed. Despite the advantages of spouted beds over fixed and fluidized beds, no research has been conducted on the thermal energy storage performance of phase change materials in spouted beds. Therefore, in the first step of this study, the thermal storage performance of a granular encapsulated phase change material (GR42) was investigated in a spouted bed under different operating conditions. So firstly, the influence of the increasing mass of PCM in the spouted bed (50 and 90 gr) and excess air velocity of 1/3 times over the minimum spouting velocity on the energy storage efficiency was investigated. Then, the influence of the increasing inlet airflow rate at a constant temperature, and the increasing inlet air temperature at a constant airflow rate on the energy storage efficiency was investigated. The results showed that increasing the mass of PCM in the bed results in a 16% increase in energy storage efficiency. Increasing the airflow rate at a constant temperature and inlet air temperature at a constant airflow rate decreased energy storage efficiency by 45% and 42%, respectively, during the charging process. Analysis of the influence of the mean particle size of PCM on the energy storage showed that spout airflow rate increased by increasing the mean particle size, which reduced the energy storage time. Thereby, the bed remained at a certain temperature for a longer period. This was also experienced in fine and coarse particles mixture, so using the particle mixture in the applications that require remaining at a certain temperature is a better option. Also, a comparison was conducted between energy storage performance of fixed, fluidized, and spouted beds under constant conditions. Experimental results showed that the storage efficiency of the spouted was 48% and 21% higher than fixed and fluidized beds, respectively. In the end, a sample of encapsulated phase change materials was produced in the laboratory, and its thermal energy storage performance in the spouted bed was evaluated and compared with the commercial sample. The results of the study between the commercial and the laboratory material showed that the laboratory material had 35% better performance in energy storage. The higher energy storage efficiency of the laboratory encapsulated material, along with lower weight and density compared to the commercial one, demonstrates the high capability of the produced material for use in solar energy storage systems or building panels.