【TEMPERATURE REDUCTION】: The 12W solar panel kit fan can push out hot air and push cold air inside, effectively reducing the indoor temperature and keeping the air fresh. It can cool the roof and reduce the load on the air conditioning system at the same time, saving green energy and doing good for the environment. 【FAN SPEED】: The fan speed is greatly affected by sunlight. When the sun directly hits the solar panel, the fan can reach 3000 rpm. When the sun is weak, the fan will run slowly or even stop working. Solar fans without built-in batteries only work during the day. 【WATERPROOF COATING & SAFETY PROTECTION】: The fan motor parts (PCB board, wiring, bearings) have been coated to prevent short circuit or damage caused by rain. The fan is equipped with a protective metal grille, which can prevent small animals from being injured and protect the normal operation of the fan blades. 【WIDE APPLICATIONS】: Wide range of applications, the solar panel fan kit can be used for home, RV,