A stand-alone system is an independent system for off-grid power needs. A stand alone solar power system lets you operate as your power source. A stand-alone system uses solar electric energy. Hence, it is referred to as a stand-alone solar system. These systems are designed for off-grid purposes in remote or rural areas that may not have any form of on-grid electricity or irregular power supply from the grid. A stand-alone system provides the electric power required via solar energy. In addition, it can also save energy that can be used later at night when sunlight is not available. A stand-alone system is fully independent as it does not rely on the grid or any other source of electricity. Stand-alone solar systems are also known as off-grid photovoltaic systems when not connected to a power line.