A small-scale hybrid standalone power system is becoming a popular alternative in remote areas where a grid connection is not economically feasible. This study tried to engage PSObased optimal sizing and control scheme, along with an energy management system, for Denkez Abunsemra health center and elementary school standalone hybrid systems comprising wind turbines, solar photovoltaic generation systems with a battery bank, and DC loads. Hybridization of renewable resources alone is not enough to ensure continuity of power flow between supply and demand. Therefore, an energy management system, along with auxiliary energy storage, can provide a significant solution for the continuity of power flow. The case study area has an average a total load demand of 30.68 kW for the next 10 years, and 20.092 kW and 10.558 kW are covered by seventy five solar PV modules and five wind turbines respectively by using PSO-based optimal sizing with the optimal global best cost of $4.806*10 5 . In this study, the impact of different techniques on the system's performance was analyzed, including PSO-based optimal sizing, hybrid PSO-P&O MPPT, PSO-tuned PID controller, and T-S FLC and a classical approach EMS. The hybrid PSOP&O MPPT technique provides better power system stability compared to using only P&O and also PSO-tuned PID controller has a quicker time response than auto-tuned PID controller method. Specifically, the PSO-tuned PID controller is reduced the rise time, peak time, settling time, and overshoot by 30.68%, 29.5%, 46.46%, and 57.09% respectively. The T-S FLC-based EMS is more responsive and adaptable to the nonlinear changes of the standalone hybrid power systems, even if the simulation time was relatively long compared to a classical approach EMS. Keywords: EMS, Hybrid system, Interleaved, DC-DC converter, MATLAB/Simulink environment, MPPT, Standalone, and T-S FLC