Off grid solar power systemsÿis a kind of energy-saving and environmentally friendly system. It is a system uses PV modules to convert sunlight into electricity. It’s made up of PV module, controller, battery and inverter. It is mainly used in some remote and power unstable areas. Solar power system is mainly used to drive all kinds of household electrical appliances and office equipment, to solve the power shortage situation without electricity or people living or working electricity problem.