Difference between Stand Alone and Grid Connected Systems

A standalone system is the one which is not connected to the power grid. In contrast, the PV systems connected to the grid are called grid connected PV system. The primary difference between the standalone and grid connected systems comes from the storage feature, which is direct consequence of their connection with the grid. While the standalone PV systems usually have a provision of energy storage or deficit energy produce by the PV source in grid connected systems is supply or drawn from the grid.