Model: MS2.7-500W Numbers of Blade: 3pcs Material of Blade: Reinforced fiber glass Diameter of blade: 2.2m Start (cut-in) wind speed: 3m/s Rated Wind Speed: 8 m/s Furling wind speed: 13m/s Outage (cut-out) wind speed: 35m/s Rated rotating speed: 450rpm Security wind speed: 45m/s Rated rotating speed: 350rpm Wind energy ratio: 40% Generator: Permanent Magnetic Alternator Generator Rated power: 500w Max output power: 700w Output voltage: 24V-36V Type of off-course: wind direction is decided by tail Temperature Range: -40 to +60 Deg. C (-40 to +140 Deg. F) Output Form:36 VDC/24VDC Nominal