This open access book addresses the issue of diffusing sustainable energy access in low- and middle-income contexts.Access to energy is one of the greatest challenges for many people living in low-income and developing contexts, as around 1.4 billion people lack access to electricity.Distributed Renewable Energy systems (DRE) are considered a promising approach to address this challenge and provide energy access to all. However, even if promising, the implementation of DRE systems is not always straightforward.The book analyses, discusses and classifies the promising Sustainable Product-Service System (S.PSS) business models to deliver Distributed Renewable Energy systems in an effective, efficient and sustainable way. Its message is supported with cases studies and examples, discussing the economic, environmental and socioethical benefits as well as its limitations and barriers to its implementation.