This report presents a high-level overview of the behaviour and contribution of renewable energy in Spain in 2017, as well as how it has evolved over recent years. It is broken down into five main chapters. The first chapter ‘Renewable energy in 2017’ is a summary chapter and provides the reader with a global overview of the behaviour of renewable energy throughout the year and consolidates the data that will appear in more detail in the subsequent main chapters: Energy from the wind, Energy from water, Energy from the sun and Energy from the Earth and sea.