Characteristic Analysis of Power Electronics and Its Applications was created by Ir. Joni Welman Simatupang, S.T., M.Sc.Eng., Ph.D. This Characteristic Analysis of Power Electronics and Its Applications book discusses boost converter to boost low voltage battery ini electrical vehicle implementation, buck converter as step-down DC/DC converter for valve- acid battery charging system using photovoltaic array, usage of transistor as switch for water level indicator, as well as characterictics analysis of Silicon Controlled Rectifier (SCR) in adjusting light dimmer & light detector sensor. We hope that this book can serve as a helpful guidance and reference for readers in general to enrich their insight on the field.