OFF THE GRID HOUSE

Here you can see two elements related to energy.

This house has both solar panels and a windmill

Here are more detailed pictures about the windmill.

There are shafts and bearings in the opening of the windmill. This way it turns to right direction.

Calculations

With average velocity of the wind 4 m/s the energy of the turbine in a year would be about 8000 kWh