Power electronic converters and their control systems have played a significantly important role in the integration of renewable energy systems. The application of these converter systems have been rapidly growing as of late, and the subject of improving the systems by means of control is a key topic in research today. The Active Front End (AFE) converter, which allows for the bidirectional power-flow is one of such systems with the possibility of grid tied connection. This master thesis embarks on some of the methods which can be used to provide control over a Grid tied inverter (GTI), for the sake of charging and discharging a battery supply/load. The thesis has been separated into several chapters starting with the needed theoretical framework as an overview over the preliminary knowledge required for the rest of the thesis. The following chapters provide in detail all the required parts of the control and the design of the converter system. Once these chapters have been presented the simulation model is introduced with its results. The last chapters conclude the work by presenting the physical hardware components for a prototype, ending with the final chapter presenting the conclusions and suggestions for future work.