Sunforce 12-Volt 400-Watt Wind Power Generator for $499.99 shipped. This device uses wind to generate power and is made of weatherproof cast aluminum with carbon fiber composite blades. This wind power generator has an integrated regulator that automatically shuts down when the batteries are completely charged. It measures 15″ x 9″ x 27″ and uses a 12-volt battery, which is not included. Most places have it for $579 or more.