... connection to tower, easy and reliable.4.Three pieces of blades will be installed well by one bolt, easy ... 2.5Survival wind speed(M/S)45Rated wind speed (M/S)10Generator modePermanent magnet generatorProtection modeOver-charge protectionClass of insulationFProtection ... lighting, communication station, monitoring system or anyplace with wind but the grid is unavoidable. 1000W off grid wind turbine