14 Inch Axial Flow Air Ventilation Fan 30W 40W DC Brushless Motor Galvanization Steel

The solar panel on the fan top produces enough electricity to power a spinning fan in the round ventilator on the roof behind the panel. The fan works when the panel is basking in sunlight.

Solar roof fans work on a very simple principle: circulate the hot air out and get the cooler air in. They work with the energy from solar It's not only environmental but also energy-saving.

30W polycrystalline solar panel (415x495x25mm),

19.5V brushless DC motor,

14'' Aluminum fan blades (air duct dia. 368mm),

square shape fan cover, square shape fan base,

size: 530x530x250mm,

[work time: sunny day hours, when sunlight is available]

IP68 waterproof motor, stand rust and humid, work well in all kind of extreme environment

durable Fiberglass Nylon 7-blades, pull out high speed and high preasure hot air

wind guide cone and blades structure, leads the air come out fluently

With this thermostat, the solar fan will start / stop rotating at a preset temperature (25 or 28℃).

That is to say, the fan will know when your house is too hot or too cold and do its air circulation job automatically.

This waterproof controller is like a little smart computor, the solar wattage output becomes its signal so that it can sense when sunlight is weak, and then it switches in the back-up power to power the fan together with the solar panel. Not any solar energy is wasted, meanwhile, fan is still running fast.

And you may decide Battery or Adapter as back up depending on whether there is convenient AC grid in your location.