This book is dedicated to lightning transients and protection for renewable energy systems, including both wind and solar energy. In addition to the formation mechanism of lightning transients, the practical engineering application has also been addressed. This book is comprehensive and covers the methodology of electromagnetic transient modelling, electromagnetic coupling for PV system, lightning protection design, testing and evaluation. This book is particularly suitable for readers interested in lightning phenomena and renewable energy systems. It would benefit researchers, engineers and graduate students in the fields of electrical engineering, renewable energy, computational electromagnetism, etc.