Provides a comprehensive picture of todays energy world, describes the potential for energy savings that can be achieved, and analyzes the technology developments which will lead to a 100% renewable energy-powered world

The world is at the crossroads of either quickly changing the energy picture towards implementing efficient renewable energy sources or postponing this process by another generation. Based on the authors more than 30 years industrial experience, this book gives a set of assumptions by extrapolating known technology developments and shows that 100% coverage by renewable technology of global energy needs is much more probable than previously argued.

Basic facts using "rule of thumb" and "order-of-magnitude" considerations underpin the authors argument. The book shows how energy efficiency technologies will be able to drastically reduce the energy consumption for the same quality of life. The most relevant renewable energy technologies are discussed. Solar photovoltaic, solar thermal concentrators, solar thermal wind, as well as biomass and biofuels, hydro, geothermal, wave, and tidal technologies are debated.

The conclusion of this unique book shows how and why the renewable technologies will be cost competitive and even superior to the traditional technologies in the mid-term. Market-pull instead of technology-push provide the increase of the cumulative installed volume of the new renewable technologies, thereby driving down the specific price of the critical components along Price Experience Curves.

Winfried Hoffmann obtained his PhD in biophysics in 1977. From 1997 until 2014 he was a member of the Board of EPIA (European PV Industry Association) and President for more than eight years. He is a member of the Scientific Board of the Fraunhofer Institute for Solar Energy and the NEXT Institute in Oldenburg, as well as a member of the Supervisory Board of the Institute for Solar Energy Research in Hameln and the Helmholtz Centre Berlin. He acts as Chairman of the Supervisory Board of Solarfabrik AG and is a member of the Supervisory Board of SMA Solar Technology AG. In 2012 he received the European Becquerel Prize for Outstanding Merits in PV from the European Commission.

Foreword xiiiPreface xviiAcknowledgements xxiiiList of Abbreviations xxv1 Introduction 11.1 The Changing World 1 1.2 Why Another Book on 100% Renewables? 32 Analysis of Todays Energy Situation 72.1 Basic Energy Terms 7 2.2 Global Energy Situation 11 2.3 Energy Sectors 13 2.4 Challenges for Fossil Fuels 16 2.5 Problems with Nuclear Energy 293 The Importance of Energy Efficiency Measures 333.1 Traditional Extrapolation of Future Energy Demands or Alternatively The Same or with Renewables Even Better Quality of Life with Much Less Energy 33 3.2 Decrease in End Energy Needs with a Better Quality of Life 35 3.3 Todays Energy Needs with Known Energy Efficiency Measures 41 3.4 Support Mechanisms to Facilitate New Products: Ban The Old or Facilitate The New Ones 424 Overview of the Most Important Renewable Energy Technologies 454.1 Basics About the Potential of Various Renewable Technologies 45 4.2 Wind Energy 48 4.3 Solar Thermal Collectors and Concentrators 57 4.4 Bioenergy: Biomass and Fuel 66 4.5 Photovoltaics 68 4.6 Other Renewable Technologies 705 PV Market Development 775.1 Strategic and Consumer Goods in Society and Why Strategic Ones Need Initial Support 77 5.2 PV Applications and History 84 5.3 Historical PV Market Development 88 5.4 Feed-in Tariffs - Sustainable Versus Boom and Bust Market Growth 93 5.5 PV Market Development Towards 2020 101 5.6 Total Budget for Feed-in Tariff Support as Positive Investment for National Economies and Merit Order Effects for Electricity Customers 106 5.7 New Electricity Market Design for Increasing Numbers of Variable Renewable Energy Systems 110 5.8 Developments for the Future Energy Infrastructure 1116 PV Value Chain and Technology 1176.1 Basics of Solar Radiation and Conversion in PV Cells 117 6.2 Value Chain for Crystalline Silicon PV Systems 122 6.3 Value Chain for Thin-Film Technologies 134 6.4 Concentrated PV (CPV) and III?V Compound Solar Cells 137 6.5 New Technologies (Dye, OPV, and Novel Concepts) 138 6.6 Other Cost Components for PV Systems 141 6.7 Marimekko Plot for PV Systems and Summary Chart for Cell Efficiencies 1427 The Astonishing Predictive Power of Price Experience Curves 1477.1 Basics about Price Experience Curves 147 7.2 Relevant Price Experience Curves Comparable to PV 148 7.3 Lesson Learned from PECs Discussed 151 7.4 Price Experience Curve for PV Modules 152 7.5 Price Experience Curve for DC/AC inverters 159 7.6 Price Experience Curve for Wind Energy and Other Relevant Products for a 100% Renewable World 1618 Future Technology Development 1638.1 General Remarks on Future Technology Developments 163 8.2 Photovoltaics 164 8.3 Wind Energy 170 8.4 Solar Thermal 171 8.5 Other Renewables 171 8.6 Other System Components 171 8.7 Importance of the Renewable Energy Portfolio - in Particular Solar and Wind 1759 Future Energy Projections - The 150 Peta-Watt-hour Challenge 1799.1 Historical Development 179 9.2 Some Future Projections and Scenarios by Others 180 9.3 Global Energy Scenarios and Market Development of the Major Renewables from the Authors Point of View 18610 Likelihood of and Timeline for a World Powered by 100% Renewable Energy 20310.1 Likelihood of a 100% Renewable World 203 10.2 Global Network or Local Autonomy? 205 10.3 Timeline for a 100% Renewable World 20911 Conclusion: The 100% Renewable Energy Puzzle 213References 219Index 225