The Smart 400 MK2 turbine is available in 24/48 volt models and uses the new generation of cog free Smart Drives. They are rated for 350-400 Watts in 36 km/h winds and have a maximum output of 550-600 Watts.Stocks of the new model are limited. The New design has a stainless steel housing with other parts made from aluminium, plastic and stainless steel. Visit our test site for a demonstration or book on a course and make your own and save $$$.