Water and energy are two of the most important pillars that support modern civilisation. Despite many similarities, the two have traditionally been generated and delivered in very different ways by different organisations and subject to different legislation and regulation but to the same customers. The very success of conventional, centralised distribution systems in large urban areas has also been their limitation for communities not living in industrialised countries. Cost and scale. This book explores and supports the provision of clean water to communities which are off-grid based on the tremendous advances made in recent years around renewable energy generation, especially solar PV and wind. It explains in the clearest possible terms the potential, progress, economics and technology that can make this a reality. It is a book for specialists and a book for generalists written in a clear and engaging style by an author of immense experience, knowledge and wisdom. It can’t be said for many books, but this really is one that can change the world!