I want to reveal to you how I constructed my own wind system from start to finish. Here is a list of materials that I used to get started. I purchased a DC permanent magnet motor from eBay. The motor is a 48 volt dc motor that as an rpm rating of 2000 rpm, which means at 12 volts dc it, has an output of 5.8 amps at 500 rpm which is ideal to charge a 12 volt battery system.
I decided to make my wind turbine out of PVC pipe which is readily available at your local home supply store. The diameter of my motor is 3