Solid state ionic technologies such as fuel cells, sensors, batteries, supercapacitors, hydrogen generation, storage de ices and electrochromic,windows are likely to play a major role in extending the life of existing fossil fuel resources by increasing the overall efficiency of energy generation and use. This ill lead to a reduction in the emissions of greenhouse gases and Pollutants. No single technology in isolation is likely to provide Solutions for the energy and environmental needs of future generations. This paper briefly outlines the applications of solid state ionic technologies for sustainable energy generation and summarises key Australian initiatives in this field. It also emphasises the significance of a total systems approach and discusses integration of renewable and solid state ionic technologies for clean and sustainable energy generation.