Don’t do it. The generated power will never exceed 100W. What do you think this little power can do?
If you must use wind power, I recommend using a car’s permanent magnet motor, which is more convenient and more powerful.
All you have to do is go offline again, and the cost is much lower than that.
20-30m blades. Generally speaking, there are 600-1000kw fans with blades of 20-30 meters, 1.5 or so 37.5, 2.5 or more than 40 meters. A motor refers to an electromagnetic device that converts or transmits electrical energy based on the law of electromagnetic induction.