If you're longing to get yourself off the grid, the Air-X is a personal wind turbine that gives you 400 watts of power when the wind is blowing at 28mph. When it s not, you can use batteries, and Air-X helps out there, too, with its charge controller that s smart enough to figure out when batteries need charging and when enough is enough.
A common complaint with wind turbines is the whining noise they make, and the Air-X is modified to reduce that racket. Its carbon fiber composite blades slow down automatically if the wind is blowing too hard. The 46-inch turbine sells for $499.