Reliance Industries, through its unit Reliance New Energy Solar Ltd (RNESL), has invested in German “green solar wafers” technology company NexWafe GmbH (NexWafe), and signed a pact with Danish company Stiesdal A/S for hydrogen electrolyser, as part of a strategy to expand its clean energy portfolio through partnerships. Late on Tuesday, RIL said it had invested 25 million euros in a Series C financing round in NexWafe. The investment makes RIL a strategic lead investor in the company, which is developing and producing monocrystalline silicon wafers, also called green solar wafers, which are cost effective.