CHENNAI: The Sterling Infotech Group (SIG) announced its foray into renewable energy space with the acquisition of 40 per cent of the paid-up share capital of the Finland-based Winwind Oy, manufacturer of wind turbines. Winwind Oy supplies one and three-megawatt wind turbines based on low speed technology. The group has also planned significant investments in renewable energy and hybrid fuels (such as Ethanol-based), according to V. Srinivasan, Director, SIG.