... : 3.5m/s working wind speed: 3.5-20m/sSafe wind speed: 40m/s rated output power: 50kw max output power: 55kw rated speed ... top section: 2050kgNecessary battery: 12V 200AH 120 piecesWind Turbine, wind turbine generator, wind generator, wind power generator, wind generator system,wind power turbine FD18-50Kw, wind turbine generator