Wind Turbine Systems such as the Vertical Axis Rooftop Wind Turbine System is a wind energy system that is not only highly efficient and strong enough to withstand gale force winds, but one that also works quieter, compact and visually striking. The RTWTS is designed specifically for rooftop installation (residential or commercial), however, the system can be mounted to a pole/tower and can be used for grid and off-grid application.