He has worked in the area of photovoltaic and energy efficiency research and R&D since 1985 in a range of positions with various companies (BP Solar, Pacific Solar) and research institutions (UNSW, Fraunhofer Institute for Solar Energy Systems, Freiburg, Germany). His current research interests are in the area of PV/energy systems for low energy buildings and highly efficient water/air systems. Associate Professor Sproul is a Program Leader (Integrated Building Systems) with the “Low Carbon Living” Cooperative Research Centre.