Renewable energy sources are a very good solution to providing alternative energy to overcome the global energy issues. This chapter reviews the development and control of single-phase grid-connected photovoltaic systems. In 1965, W. Mcmurray first developed the full-bridge or H-bridge inverter family. Force-commuted semiconductor devices, also called thyristors, were first effectively utilized by this structure. A new inverter topology called “highly efficient and reliable inverter concept” was patented by Sunways in 2006. This topology is called a highly efficient and reliable inverter concept. The input voltage stress on both the output inductor and the switches is reduced to half, thus increasing the efficiency. By using an additional DC bypass or AC bypass or higher switches of the bridge, the zero-voltage state is accomplished by shorting the grid. The variation of classical Neutral point clamped yields to the HF topology whose output is clamped to the neutral using two back-to-back- insulated gate bipolar transistors-based bidirectional switches.