This tutorial presents the high-efficiency and high-density single phase PV inverters with advanced topologies, control and WBG Devices. First, this tutorial comprehensively reviews the conventional topologies, control and performance limitations of the conventional single phase PV inverters including micro-inverters, string inverters, cascaded H-bridge inverters and medium voltage PV inverters. Based on the detailed review, this tutorial discusses the advanced topologies, modulations and control of single phase PV inverters. Microinverters are integrated with PV panels and get a great success. Dr. Patrick Chapman from Enphase Energy will present the history, the design requirements and approaches, and future challenges of high efficiency and high density microinverters. String inverters are the most popular single phase PV inverter products. Dr. Qingyun Huang from UT Austin will review the technologies and their limitations of the traditional string inverters first. Then two advanced string inverter topologies, the dual-Buck inverters and the flying capacitor multilevel inverters with GaN devices, will be presented with the control strategy and design methods. Dr. Qingyun Huang will also discuss the design, control and modulations of the panel based hybrid inverters, the cascaded H-bridge inverter and a new cascaded Buck-Boost inverter with high efficiency and low cost. Finally, Dr. Alex Huang from UT Austin will present the advanced high efficiency and high density modular medium voltage PV inverters including the applications, topologies, control and design methods.