Photovoltaic (PV) systems convert sunlight into electricity, providing a powerful and scalable means for buildings to generate their own clean energy. Modern PV panels can be installed on rooftops, façades, and even as building-integrated solutions, seamlessly merging with architectural aesthetics. Advances in technology have improved efficiency, durability, and adaptability, making solar energy more accessible than ever before. Coupled with net metering or feed-in tariffs, excess energy can be fed back into the grid, offsetting costs and reducing environmental impact. Properly designed PV systems consider orientation, shading, and energy storage options, ensuring maximum return on investment and effective year-round performance.