low startup wind speed 3 8m s vawt

{"cid":"91224559","title":"10KW Vertical Axis Wind Turbine with Low Startup Wind Speed and Noise-Free Operation for Off-Grid Applications","imgUrl":"https:\/\/img.chinax.com\/nimg\/74\/28\/290edaaf1655e4dda278d9ec3d20-200x200-1.jpg","attrs":{"Price":"9500$","Brand Name":"BF","Model Number":"BF-C-10K","Minimum Order Quantity":"1","Delivery Time":"20-25 DAYS","Certification":"CE","Place of Origin":"China","Payment Terms":"T\/T,L\/C","Supply Ability":"500UNITS PER MONTH","Packaging Details":"PLYWOOD CASE","Material":"Q235&FRP","Working tempreture":"-45-60\u2103","Rotor diameter (m)":"6","Height of blades":"6.6","Rated rotor speed (m\/s)":"100R\/150Rmin","Speed regulation method":"Electromagnetic control","Top weight (kg)":"660kg","Start up wind speed(m)":"3.8m\/s","Survival wind speed(m)":"50","Rated wind speed(m\/s)":"13","Tower type":"133mm steel tube","Height of tower":"10M","Material of blades and numbers":"Glass fiber reinforce plastic\/5","Output voltage":"220V\/380V","Number of Bldes":"5"}}