Blade diameter:18m blades:3 blades material: fiber glass rated wind speed: 13m/s start wind speed: 3.5m/s working wind speed: 3.5-20m/s security wind speed: 40m/s rated output power: 50kw max output power: 55kw rated speed: 80r/min type of generator: permanent-magnets- 3 phase ***** speed regulation: microcomputer intelligence controller output voltage : DC380V output controller system: tower type:Free standing tower normal tower height:18m weight of top section: 2050kg Necessary battery: 12V 200AH 120 pieces