So the answer to the question “ Are black solar panels better than blue ones? ” is yes, black monocrystalline systems appear to be better than blue ones if efficiency, aesthetics, and long-term energy output are the priorities. But are they worth the cost? We'll break down everything you need to know about black solar panels to help you decide whether they're right for you. I've seen claims that flexible panels are more efficient in overcast days, and when I tested mine, the flexible panels were more efficient in. Solar PV modules have a dark appearance which leads to the conclusion that solar panels are usually black nowadays. This means they run slightly more efficiently in hot climates. Less heat equals better performance, making them the valedictorians of solar panels.