The Wind Shark is a self-starting, vertical axis wind turbine that was specifically designed to start up and operate in lower winds than conventional wind turbines. Because it can work in lower winds, it doesn’t require expensive towers with guy wires to hold it up into the higher wind areas. This means you don’t need a lot of real estate to own one and won’t have as many problems with municipal height restrictions as you would with a conventional turbine. It can handle turbulent winds easily and doesn’t even need to be furled in high wind conditions. It’s very quiet while operating and is also very pleasing to look at so it won’t bother your neighbours at night. Its smooth forward face lets it shed water and snow. Wind Shark 20 specifications: Blade Height: 50.8cm (20”) Turbine Diameter: 76.2cm (30”) Swept Area: 0.39m2 Rated output: .2 KW / 12-24 volt battery charging Energy Production: 20 kWh per year or 876 amps per year @ 12 mph Color: White Blade Material: PETG Total Turbine Weight: 8.5kg (18.7lbs) Comes with a wind charge controller Options: roof mount, side wall/post mount, top of pole mount Idea for small battery trickle charging: 100-400 AH Battery Size Applications: RV, small cabin/travel trailer Remote Weather/Telecom Station, Remote lighting/water pumping Adding solar panels to any battery power system is always a good idea.