Today, the grid-connected photovoltaic (PV) power system plays a significant role in generating electrical energy by making use of the sun’s rays, then converting it into usable electrical energy and connecting it to the electrical grid. This process can be done by connecting the PV panel to the DC/DC converter then there will be a controlled DC/AC inverter. This paper discusses a literature review about the PV system, types, advantages, and disadvantages, generating level ratings and levels, statistics, and comparisons between countries worldwide. In addition, a review of the control method presented in PV systems.