The Solar Star Attic Fan is a solar powered attic ventilation system that is completely self-contained. The solar panel produces all of the electricity to turn a powerful fan that moves up to 850 cubic feet per minute of air out of your attic. That means humidity and temperature levels never reach critical activation levels that trigger electric powered attic fans. The Solar Star Attic Fan requires NO electrical hook-ups, NO electrician and NO cost to operate! Very easy installation with a seamless, one-piece flashing. The Solar Star has a 5 year warranty on the solar panel and motor and a 10 year warranty on all other components.