The study was focused on design and development of a plug-and-play micro-grid interface kit, which will be capable of integrating multiple standalone photovoltaic (PV) systems or multiple UPS backup systems to formulate a microgrid. This prototype comprised of a) bidirectional converter, b) its control regime and c) an energy accounting mechanism. To further enhance the user friendliness and consumer involvement in a free energy trade market, graphical user interface (GUI) based web and mobile applications was developed and integrated with the prototype so that individual users may have a log of their energy transactions and set their transaction preferences for enhanced profitability. MIK has the potential to enhance the utility of standalone systems and its target market / end users range from rural consumers to urban consumers having backup systems installed in their household electricity network.