Windcity patented a disruptive energy conversion concept maximizing production in any variable wind. Vision: "Variable Geometry for Variable Wind" means simple mechanics allowing up tp +80% energy harvesting compared to competitors. Sustainability: no extra energy is needed to operate the variable geometry, low energy price to empower developing countries. Scalability: by a 1 kW prototype we validate a CleanTech reliable in machines up to 100 kW.