The main difference is in appearance, with all-black panels offering a more modern and sleek design. Regular panels are usually more affordable and may offer slightly better efficiency, especially in hot climates. These crystals make it harder for electrons to flow through the. . Some solar panels appear to be all black, whereas others are colored a traditional blue color. It would be best if you learned about the differences between them to determine which suits your needs better. So, what differentiates an all black solar panel from a traditional blue one? To help you. . Solar panels are black and blue because those are the natural colors that silicon becomes during the manufacturing process.