This document gives a summary of the results of the Energy Balance research project that was operated in 2007-2009 at Wuppertal Institute for Climate, Environment and Energy (Germany). Four questions were the starting point of the Energy Balance project: How can renewable energy be used more efficiently? How can technologies and infrastructures use renewable energy in a technically and economically meaningful way? How can the interaction between renewable energy and energy efficiency be optimized in the political instruments? How can energy policy instruments that are successful in the area of renewable energy be transferred to the energy efficiency sector and vice versa? The first chapter explores scenarios by 2020 and target concepts. The second chapter describes solutions for intertwining renewable energy and energy efficiency in the building sector. Other chapters concern the electricity and tranport sectors.