Makani Power, which was acquired by Google (GOOG: Nasdaq) in 2013, was already on our list as a developer of high altitude wind power using kites. Makani claims its kite application will cost less than the conventional rotor turbine on a tower. More importantly, they propose to allow their ‘tethered airfoils’ to fly in higher altitudes to access more consistent, stronger winds. The kites with turbines attached will fly in vertical loops. When wind speeds slow, the kite is returned to the ground to wait for improved wind conditions.