Sun trackers are not free, and nowadays it's cheaper to offset the losses of a rooftop with more panels than to buy a tracker. Also dessert is not particularly

Sun trackers are not free, and nowadays it's cheaper to offset the losses of a rooftop with more panels than to buy a tracker. Also dessert is not particularly good for panels. A panel could reach 70-80°C in such environment, when its optimal is at 25°C. Will lose around 25% efficiency.