A work on the review of integration of solar power into electricity grids is presented. Integration technology has become important due to the world’s energy requirements which imposed significant need for different methods by which energy can be produced or integrated, in addition to the fact that integration of solar energy into non-renewable sources is important as it reduces the rates of consuming of non-renewable resources hence reduce dependence of fossil fuels. Photovoltaic or PV system are leading this revolution by utilizing the available power of the sun and transforming it from DC to AC power. Integrating renewable energy of this source into grids has become prominent amongst researchers and scientists due to the current energy demand together with depletion of fossil-fuel reserves and environmental impacts. In this review, current solar-grid integration technologies are identified, benefits of solar-grid integration are highlighted, solar system characteristics for integration and the effects and challenges of integration are discussed. Integration issues and compatibility of both systems (i.e. solar and grid generations) are addressed from both the solar system side and from utility side. This review will help in the implementation of solar-grid integration in new projects without repeating obvious challenges encountered in existing projects, and provide data for researchers and scientists on the viability of solar-grid integration.