The primary objective of this book is to introduce various methods for the optimal placement of Distributed Generation (D.G.) Units and Electric Vehicle (E.V.) Charging Stations within radial distribution systems. This book explores the impact of Electric Vehicle Charging Stations (EVCS) on distribution systems and delves into the optimal placement of multiple DG units of different types, along with EV charging stations. The operations of these units in both Grid-to-Vehicle (G2V) and Vehicle-to-Grid (V2G) modes are investigated, focusing on loss reduction and voltage profile improvement within radial distribution systems. The book comprises six chapters.