This book contains selected papers from the 22nd World Renewable Energy Congress (WREC 2023) in Kuala Lumpur. The forum promotes renewable energy global development and features top international experts, policymakers, scientists, engineers, technology developers, and business practitioners addressing the most current research in sustainable energy development and innovation. The contributions address policy, technology, and applications across a wide range of topics, including solar thermal, geothermal energy, wind energy, turbines and generators, bioclimatic architecture, energy audits, construction and design, low carbon mobility, green steel, batteries and supercapacitors, regulatory issues and public policy, circular economy, urban mining and much more.