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This paper explores a standalone renewable energy system that includes a wind generator and a battery energy storage (BES) module. The renewable source operates in parallel with the load, requiring synchronization control. Maximum power extraction from the wind generator is achieved using a sliding mode control perturb and observe (SMC P&O MPPT) technique, while the BES is linked to a common DC bus. An inverter employing active power control (APC) with an anti-windup proportional integral (AWPI) controller helps reduce harmonics. The system’s performance is assessed by analyzing total harmonic distortion (THD) in inverter voltages and currents under optimized SMC MPPT and AWPI-based control strategies.