Designing a Grid-Connected Photovoltaic (PV) System with Battery Storage and Nonlinear Loads in MATLAB involves creating a comprehensive model that integrates solar panels, batteries, and nonlinear electrical loads with the grid. This model allows for the analysis of system performance under various operating conditions, including fluctuations in solar irradiance, battery charging and discharging, and nonlinear load behavior. By simulating the system in MATLAB, engineers can assess the impact of different control strategies, such as maximum power point tracking (MPPT) for the PV system and battery management algorithms, on overall system efficiency, grid stability, and the quality of power delivered to nonlinear loads. This approach enables the optimization of grid-connected PV systems with battery storage to meet energy demands reliably and sustainably while maintaining grid compatibility.