The present work presents an innovative methodology aimed at improving the reliability of electricity provision for isolated photovoltaic (PV) installations located in regions with fluctuating weather patterns. The proposed scheme incorporates a single-phase, dual-input simplified split-source inverter (denoted as \(DS^{3}I\) ) operated under an advanced control strategy utilizing model predictive control (MPC) principles. Key components of the system include a photovoltaic array, the \(DS^{3}I\) inverter, an energy storage unit, and a bidirectional DC/DC power converter. The photovoltaic array is maximum power point tracking (MPPT) that employs a proportional–integral (PI) perturbation-and-observation technique, whereas the \(DS^{3}I\) inverter ensures minimal harmonic content during the synthesis of both the DC boost and AC load voltages. Empirical evaluations demonstrate the system is capability to autonomously regulate MPPT across two photovoltaic modules amid fluctuating irradiation and load demands, alongside preserving DC bus voltage consistency and attaining reduced harmonic distortion in AC waveforms (total harmonic distortion, THD < 2.65%), thus highlighting its superior dynamic performance and resilience.
