Dr T Bernhard Scheffler has an M Sc cum laude in Physics from the Univeristy of Stellenbosch, and a D Phil in Physics from Oxford University (1970).. He has taught various postgraduate and undergraduate Physics courses at the University of Pretoria for nearly 4 decades, including Renewable Energy.(based on Duffie & Beckman's text, as well as on the text Nonimaging Concentrators by Winston & Welford, and several seminal papers by Gordon & Riess He has also installed several solar pool heating systems of his own design & manufacture, of which some are still running after more than 2 decades . He served on the Board of SESSA (Solar {now Sustainable} Energy Society of Southern Africa) (1974-93) and National Chair (1984-6) He founded the SESSA and ISES-Africa magazine The African Sun, and was its Editor and later Editor-in-Chief (1992-5)