This new wind turbine can generate half the typical home's electricity needs. It's been invented and now manufactured by The Archimedes. It will be available for purchase in July. I've already inquired about ordering one. Cost is about $5,000 for the hardware. Not bad. This should generate more than enough power to keep the Model S always charged with nothing off the grid. Go green technology! With these perhaps the need for huge wind farms will be diminished if not eliminated.