In one concise volume, this practical text provides an overview of all the causes and remedies of energy intermittency. It describes levels of variability for traditional and renewable energy sources, presenting solutions for handling energy intermittency through trade, collaboration, demand management, and active energy storage. "Traditional energy people use the word 'intermittency' as an epithet, a drawback that fatally compromises energy innovation. Professor Sorensen shows, with many persuasive examples, that intermittency is actually characteristic of how we use energy. He demonstrates that practical measures to address intermittency may be a crucial aspect of our transition to a more stable, reliable global energy system."-Walt Patterson, Chatham House, London, UK "[This book is] unique in the sense that intermittency has (to my knowledge) not earlier been the central issue of a book. It has rather been treated sporadically as one of many issues related to renewable energy, but not gotten the in-depth treatment that it deserves. ? [This book is] appropriate, useful, and valuable for research and education within the 'new' energy technologies. It covers a relatively unexplored area between several disciplines and that could make it interesting to a broad audience."-Claus Nygaard Rasmussen, Technical University of Denmark, Lyngby "If we are to move to a sustainable energy future, then we will need to find ways to balance variable renewable supplies and variable demand. This book provides a straightforward guide to the technical options, along with some breathtaking and original case studies on how China, Korea, and Japan might meet their energy needs using renewable energy sources. ... With admirable clarity, this book shows how intermittency can be dealt with by a mix of system management techniques, energy storage, and energy trading arrangements. ... This on its own is a very timely contribution to the energy debate, but the book goes further and develops a series of original case studies on sustainable energy plans for...countries which might otherwise be trapped in fossil and nuclear fuel-based futures."-David Elliott, The Open University, Milton Keynes, UK "This is...the first book to consider intermittency as a basic point of an energy system. [Also] highlighted in the book is population density-a parameter often missed in texts concerning energy policy. ... The author does not limit his analysis of intermittency to energy storage. He integrates energy storage with interconnections among different countries and with energy demand management. ... The perspective is [to use] a mix...dependent on the specific situation in terms of the kind and amount of energy sources available, of per-capita energy demand, and of population density. To this concern, some countries are analyzed in detail with interesting conclusions."-Giuseppe Spazzafumo, University of Cassino and Southern Lazio, Italy