Since early 2003, two 300 kilowatt wind turbines have supplied renewable energy to augment the diesel power generation system at Australia’s Mawson station in Antarctica. Levels of annual average renewable energy penetration are typically between 35% and 40%. In 2014, a record maximum annual average renewable energy penetration of 51% was achieved. This presentaiton examines the techniques used to bring about this increase with reference to the authors practical operational experience including the challenges and highlights of wind turbine maintenance, wind-diesel optimisation and low-load diesel operation