When the knowledge about the work of solar panels. And comparing the flow rate, and, 0.25 0.15 0.01 0.05 kg / s respectively, found that the flow rate 0.25 kg / s can heat the best. Lower the temperature of the solar panels is about 13 - 15˚C, the rate of air flow 0.25 kg / s will make M 120 W solar panel efficiency of 16.3%, the highest efficiency solar panels P120 W high 11.7%. T 50 W solar panels and most powerful 6.2%.