A typical microgrid is consists of interconnected load with renewable, non-renewable distributed generation sources and energy storage devices to manage load demand. The utilization of solar renewable energy sources offers many advantages, such as decreasing environmental emissions and enhancing cost economy. The optimal design of the microgrid includes identifying the most suitable configuration from all possible configuration and choosing the suitable capacities of the storage devices and the energy sources. In this case study, the grid-connected microgrid is designing based on the minimum energy cost and net present cost. Therefore, the proposed microgrid shows more benefits with respect to technical and cost economy performances relative to base case system. A case study of NIT Durgapur system is presented to design and analyze utility grid-connected microgrid systems, including the two optional tariffs. Finally, the comparative analysis is also presented for the proposed microgrid system. © 2021 IEEE.