A 3 MW grid-connected photovoltaic (PV) system with partial shading effects simulated in MATLAB is a computational model designed to analyze the behavior of large-scale PV installations under conditions of partial shading. This setup typically involves a PV array connected to the electrical grid, where shading from nearby objects, clouds, or other obstructions can cause non-uniform illumination across the array. By utilizing MATLAB, engineers and researchers can model the complex interactions of shading patterns and their impact on the system's performance, including voltage fluctuations, power losses, and potential hotspots. Through this simulation, they can develop mitigation strategies, such as optimized panel placement, bypass diodes, or advanced MPPT algorithms, to improve the overall efficiency and reliability of grid-connected PV systems, ensuring maximum energy harvest even in partially shaded conditions.