I wanted to explain to you how windmill electricity is able to work. A windmill produces power in the form of electricity by using motion. The wind pushes the blades of the windmill and it spins it.
There is an alternator inside the windmill apparatus that cause a build up of friction that is switched into a current that is electrical. The size of the windmill dictates how much energy is produced.
I know what you are thinking. You are feeling as if you will have to build a huge windmill that will be large than your house in order to have enough electricity produced for your home. I felt the same way.
In actuality a residential windmill can be very small and you will be able to assembly one yourself easily. You just have to follow the instructions to a windmill building plan and to have some patience.