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'Outstandingly good general text.' - British Book News

'Twidell and Weir are masters of their subject and join the ranks of acomplished authors who have made a powerful contribution to the field. Renewable Energy Resources is a superb reference work.' - Paul Gipe, www.wind-works.org

'It's ideal for student use - authoritative, compact and comprehensive, with plenty of references out to more detailed texts ... a very valuable book.' - Professor Dave Elliott of the Open University, UK, in Renew 162 2006.

'What we need to combat climate change is a stream of students and graduates with the knowledge they can gain from this book ... suitable not only for engineering students but also for policy-makers and all those concerned with energy and the environment.' - Corin Millais (CEO Climate Institute)

'The comprehensive and integrated approach of Renewable Energy Resources provides a reliable and cost-effective introduction for basic understanding and reference across the full spectrum of renewable energy supplies and applications.' - International Solar Energy Society

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"Renewable energy requires an active approach, based on facts and data. The 4th edition of Renewable Energy Resources, draws on decades of experience, making this come alive by documenting the connections between basic theoretical concepts in energy and the workings of real systems. It is a delight to see the field having advanced to this level so Renewable Energy Resources can focus on the very real experiences of the energy systems, and a rich analytic and policy landscape." -- Professor Daniel Kammen, Director, Renewable and Appropriate Energy Laboratory, University of California, Berkeley, USA

"A veritable revolution has transformed the world of renewables over the last five years – as revealed so eloquently in this new edition of Renewable Energy Resources. This textbook also allows us to envisage the astonishing transformation in energy markets around the world that renewable energy now makes possible – providing by far the biggest contribution to addressing today’s Climate Emergency of all the different technological solutions available to us. Politicians would just need to recognise the full extent of this potential, and reframe energy markets accordingly." -- Jonathon Porritt CBE, Co-Founder ‘Forum for the Future’, Chancellor of Keele University, UK

"The generation of electricity from renewables, especially by the globally effective technologies of solar and wind, is now recognised for cost effectiveness and the mitigation of climate change. All these technologies need increasing numbers of qualified and committed graduates. Renewable Energy Resources provides the scientific knowledge, motivation and background to set them on their path." – Professor Martin Green FRS, FAA, Director, Australian Centre for Advanced Photovoltaics, University of New South Wales, Australia

"I highly recommend this book for its thorough introduction to all the important aspects of the topic of renewable energy resources. The book is excellent in its completeness and description of the relevant different sources. Moreover it is strong in theory and applications. From a scientific and engineering point this book is a must." – Professor Henrik Lund, Editor-in-Chief of the international journal Energy, Aalborg University, Denmark

"Building on its detailed analysis of the science and engineering of renewable energy, the new 4th edition includes improved treatment of key issues for mass deployment, including how renewable energy is used and integrated into the wider energy system. John Twidell and Tony Weir have brought their huge expertise to this classic text for 25 years. As more people realise that a renewable powered energy system is possible and desirable, the revised and updated edition becomes even more important." -- Nick Eyre, Professor of Energy and Climate Policy, University of Oxford, UK

"The new edition of this superb book is very much welcomed. Each previous edition has been a recommended text for our MSc programme in Renewable Energy at the University of Reading. It is ideal for students as it is authoritative, comprehensive and has detailed explanation of the various technologies. It includes learning outcomes at the start of each chapter and worked examples throughout the text. Very useful quick questions and further exercises are at the end of each chapter. The text is supported by great diagrams, photographs, case studies and plenty of refences for further study. I am looking forward to using the updated edition in my classes." -- Maria Vahdati, Associate Professor in Renewable Energy, University of Reading, UK

"The 4th edition of Renewable Energy Resources is an excellent text for engineering educators in the field of Renewable Energy. Updated and extended, the topic coverage is comprehensive and continues to strike an excellent balance between theory and practice. I am sure this new updated edition will be a valuable resource to both educators and students." – Professor Alistair Sproul, Professor Alistair Sproul, Head of the School of Photovoltaic and Renewable Energy Engineering, University of New South Wales, Australia

"As the Pacific islands fight the triple challenges of energy access, energy security and climate change, sustainable energy development has become extremely crucial. The University of the South Pacific, a regional university, has been involved in human capacity building in renewable energy for the many years. We have used Renewable Energy Resources as the main textbook for our RE courses and found its extensive coverage of technologies, theoretical background and problem sets extremely useful. Kudos to Dr. John Twidell for this updated edition which will be of immense value to RE practitioners globally." – Dr Atul Raturi, University of the South Pacific, Fiji

"The breadth of topics and level of detail make this a vital textbook for researchers and students of renewable energy systems. An understanding of the scientific basics and engineering applications of renewables are vital if we are to make progress towards clean and affordable energy for all." -- Dr Sara Walker, Director EPSRC National Centre for Energy Systems Integration, Newcastle University, UK

"This textbook, now updated and refined in its fourth edition, has long underpinned the global growth of renewable energy. It serves the ever-expanding renewables technologies by motivating and instructing knowledgeable graduates. Moreover it explains how renewables provide both climate change mitigation and economic sustainability." -- Jeremy Leggett, founder of 'Solarcentury Ltd' and the charity Solar Aid; Hillary Laureate for International Leadership in Climate Change (2009), Gothenburg (2015), Royal Dutch Honorary Sustainability Award (2016)

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