The key technology for the continuous supply of electricity from solar power plants is a thermal energy storage (TES) approach. The selection of the best storage system and the correct thermal storage material remains a significant challenge in solar power research and development. The thermocline TES system is a cost-effective choice for storing latent and sensible heat by comparing it to the liquid storage substance in a two-tank TES system. The study is performed to assess the thermal characteristics of thermocline tank structure by using a hybrid sensible latent heat storage system. The dispersion-concentric simulation studies were first examined using the MATLAB code, and afterward, the current findings of the research were verified. The major goal of this study is to look into and assess the effect of changing the sensible storage material layer of a hybrid sensible, latent heat storage system on the TES tank's thermal performance. The findings reveal that employing a sensible heat storage material with a high specific heat capacity, such as slag pebble, permits the TES tank to charge for the most extended duration feasible and discharge more stored energy with greater efficiency. The recovered energy of hybrid slag pebble phase change materials (HSPPCMs) configuration is 142.6 MWh, which is more significant than all other configurations examined. The HSPPCMs arrangement demonstrates the maximum capacity ratio and the utilization ratio of 82.39 % and 80.91 %.