The advantages of vertical axis wind turbines : 1, Security 2,Noise 3,Wind resistance 4,Power curves The advantages of vertical axis wind turbines : 1, Security 2,Noise 3,Wind resistance ... of blades5Turbine weight49kg Tower height6m Tower typeSteel (Q235B)Suggested battery type12v100AH 2pcsService life20-25 yearsHigh quality and competitive price guarantee us a ...