**Preface to "Artificial Intelligence and Sustainable Energy Systems"**

The problems that affect humanity are numerous and occur in different areas. Energy sustainability, climate change, and the effects derived from pollutants and viruses are some of the most relevant problems. The main objective of researchers is to provide solutions to these and other problems.

In recent years, the use of artificial intelligence has increased considerably. Artificial intelligence is used in different areas: energy, sustainability, medicine, health, mobility, industry, etc. Therefore, it is necessary to continue advancing in the application of artificial intelligence to the aforementioned problems. Energy is a precious commodity, and it is increasingly difficult to dispose of it in a sustainable way. In this sense, renewable energy sources are essential, although the use of conventional energy cannot be forgotten. Therefore, sustainable energy systems, integrating renewable and non-renewable energy sources, smart systems, and new business models, are crucial.

Therefore, in this book, the best accepted and published articles on the topic "Artificial Intelligence and Sustainable Energy Systems" are presented. All articles refer to the themes indicated above.

> **Luis Hern´andez-Callejo, Sergio Nesmachnow , and Sara Gallardo Saavedra** *Editors*
