Renergen Ltd. operates as an investment holding company, which engages in the provision of alternative and renewable energy sectors. It operates through the following segments: Corporate Head Office, Tetar4, and Cryovation. The Corporate Head Office segment is involved in investment holding company focused on investing in prospective green projects. The Tetra4 explores for, develops and sells compressed natural gas (CNG) to the South African market. The Cryovation segment consists of the Cryo-Vacc technology which enables the safe transportation of vaccines and biologics at extremely low temperatures without the need for electrical power. The company was founded on September 30, 2014 and is headquartered in Johannesburg, South Africa.