Renewable energy technologies include all solar-based energies such as photovoltaics, thermal heating and cooling, wind, biomass and hydro, to name a few. Other utilization possibilities of this principle source of energy are in passive building design and energy efficiency. The inter-disciplinary nature of SESSA attracts the membership of industry, scientists, researchers, developers and the general public – the only qualification is a keen interest in renewable energy and its utilization to ensure a sustainable energy future.