This Book presented the modeling and simulation of a Photo Voltaic System (PVS) and battery connected to load in a micro-grid system using the lookup table method. Two lookup tables are modeled for the photovoltaic system and load connected. Power flow in a photovoltaic system, battery, and load connected are shown for 24 hours during a typical day. Island mode operation is made possible through the process by considering PV and Battery i.e., without depending upon the grid power system. Battery Storage is controlled using the proposed control strategy to optimize power flow during peak load or short circuit conditions. State of Charge (SOC) during 24 hours of time shows the effectiveness of the proposed control strategy for the battery.