1. Variable pitch 2. On-grid system 3. Maintenance free 4. High efficiency Introduction of 10kw pitch ... and strong gale.Low wind speed start up, pitch regulation, safe systemCharacteristics:1. Optimum aerodynamic shape design: high efficiency, low ... and strong gale. Low wind speed start up, pitch regulation, safe systemCharacteristics:1. Optimum aerodynamic shape design: high efficiency, low noise ...