Makani Power, the company founded in part by Larry Page and Sergey Brin’s kitesurfing buddy Don Montague, has scored another $5 million in investment from Google as part of a second round that could net as much as $20 million. That’s on top of the $10 million already invested in the startup’s plan to create electricity from high-altitude air currents. This money, like the first round, presumably comes from’s project to tap into renewable energy that’s cheaper than coal.