This High Efficency Solar Attic Fan helps protect your Attic from damaging heat and moisture build up. Solar powered roof mounted attic ventilator with Quick & easy installation comes fully assembled with no electrical wiring required. 12.6w Solar Panel Spec: Silicon Crystals * 18 Volts * .66 Amps * 12.6 Watts * Size: 325mm X 335mm * 25 ft. Solar Panel Power Cord.