solar power attic fan cost

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Can anyone tell me about their own experience with a solar powered attic fan? Perhaps a brand and why.?

I understand that they reduce your overall utility cost and they seem to make sense. I just do not know about durability and things to watch for. Some perspective would be useful on Companies to avoid and in some cases solar companies to embrace.i.e. customer service Do you think I should physically see the product versus trusting the description on line? Let me know your experience with the cost benefit ratio, particularly the cost savings on your electric utility bill.

It’s there during the summer for ventilation, and during the winter, to prevent it from getting too cold we tie a plastic bag over it to keep the rain/snow/etc out.

Lomanco BIB-12 MILL Whirlybird Turbine Ventilator $64.43 Featuring permanently lubricated upper and lower ball bearings, the Lomanco 12-inch whirlybird turbine ventilator ensures long life and no maintenance. It reduces winter ice build-up, as well as energy bills. Made with all-aluminum, rust-free construction, this internally braced turbine ventilator withstands winds up to 147 MPH. With a rigid, spider-type structure, it’s riveted at every connection…

Sunforce 81130 Solar Attic Vent $249.99 Keep your attic clean and dry, with no running costs 11-inch fan blades and galvanized, powder-coated flashing Reduce your electricity bills and cooling costs with the versatile Sunforce Solar Attic Vent. Using the sun’s power, this unit removes vapor build-up and moisture out of the attic, resulting in less heat. With no running costs, this system will effectively prevent the growth of mold a…

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