This book is a concise reader-friendly introductory guide to understanding renewable energy technologies。 By using simplified classroom-tested methods developed while teaching the subject to engineering students， the authors explain in simple language an otherwise complex subject in terms that enable readers to gain a rapid understanding of renewable energy， including basic principles， the different types， energy storage， grid integration， and economies。 This powerful tutorial is a great resource for students， engineers， technicians， analysts， investors， and other busy professionals who need to quickly acquire a solid understanding of the science of renewable energy technology。