A grid-connected photovoltaic (PV) system with a two-array model in MATLAB is a computational framework used to simulate the behavior of PV systems connected to the electrical grid. This model typically consists of two separate PV arrays connected in parallel or series-parallel configuration, each generating electricity from sunlight. By employing MATLAB, engineers and researchers can analyze the performance of the PV system under various conditions, including changes in solar irradiance, temperature, shading effects, and grid voltage fluctuations. The simulation allows for the assessment of system efficiency, power output, voltage stability, and grid integration issues. Additionally, researchers can explore different control strategies, MPPT algorithms, and grid interaction mechanisms to optimize the performance and reliability of grid-connected PV systems with multiple arrays.