We are offering wind turbine off-grid wind turbine system, also called off-grid wind-electric stand alone system, is not connected to an electric distribution system or grid, so they should use batteries to store power from wind turbines. People generally choose these systems because their home or other energy use is not connected to the grid, and connection would be expensive. Others prefer the independence of off-grid systems, or live where utilities and governments make it difficult to tie a renewable energy system to the grid.