The diameter of the 5KW fan blade is: 6m, the tower height is 9m
If you want to stably output the power of 5.5KW, the wind speed must be at least 12m/s. Considering the instability of the wind speed, you need to equip 18 12V100A batteries. The above mentioned is that the motor has intermittent operation. If it operates continuously, it needs to be equipped with a 10KW wind power equipment. If it is AC, then an inverter is needed. The total price is about 150,000.
Additional answer:
Then you have to calculate the transmission ratio and whether the torque output by the windmill is enough. That is to say: the ratio of the circumference of the transmission circle of a windmill that rotates at 200 rpm to the circumference of the driven wheel on your 1440-rpm motor shaft is: 200:1440. That is to say, when the windmill rotates once, you The motor has to rotate 7.2 times. If the minimum input torque of your motor is 1NM, then your windmill must reach at least 8NM. A general three-blade windmill is estimated to have a diameter of more than 6 meters, and the wind speed cannot be less than 10 meters/ It takes seconds to meet the requirements, or if you make a vertical one and put a few more leaves, it would have to be three to four meters.