Wind is actually a form of solar energy. Winds are caused by the heating of the atmosphere by the sun, the rotation of the Earth, and the Earth's surface irregularities. For as long as the sun shines and the wind blows, the energy produced can be harnessed to send power across the grid.
Wind power is cost-effective. Land-based utility-scale wind is one of the lowest-priced energy sources available today. With prices sold at fixed prices spanning 20 plus years and resource supply is free, it diminishes price uncertainties in traditional forms of energy.