At present, the integration of various distributed energy resources is a key concept in the formation of smart grid. Particularly, solar and wind generators plays a major role in renewable power generation. But, these systems have many challenges to produce power at higher efficiency. The main challenge in solar photovoltaic (SPV) system is low cell efficiency. In addition, solar panel output is affected due the climate conditions such as Sun's irradiation level and temperature. Similarly, the output power from wind energy conversion (WEC) system is dependent on wind velocity. Instead of dealing with the climate change and low efficiency of a power source, the available power generated can be controlled and regulated using power converters to supply grid. Integration of solar system, wind energy, and other renewable energy sources to the smart grid provides a solution for above-mentioned challenges. The individual and co-generation of power from all the RES can be monitored and controlled through a Multi-Mode Power Converter (MMPC) which performs battery charging and inverter mode operation using single converter topology. This chapter presents detailed study of the MMPC in grid connected renewable energy application and comparative results with conventional converter control features are presented.