It consists of solar module, solar charge controller, DC to AC power inverter, battery banks and bracket system.  This kind of off-grid system is very characteristic.  The first feature is that the application site is in areas without grid connection or unstable grid connection, such as some countries in Africa, where there is no grid connection, and many local people often use a set of off-grid system for lighting.  The second feature is its application in the military field.  Solar power generation systems are widely used both at home and abroad. For example, they can solve the daily lighting of expeditions or training troops and supply power to some equipment.  The third characteristic is precious.  For example, we can often see solar underwear, solar yachts, solar airplanes and so on on the Internet, which are all off-grid systems that use solar energy to generate electricity.  The most common thing in our life is that the solar street lamp is also an off-grid system.