Nowadays, there are still a large number of people living in the world without electricity. They live in poor or remote areas, far away from power plants and public power grids. Because there is no electricity, they can not enjoy the information and convenience brought by modern civilization. Photovoltaic off grid power generation system is an independent and self-sufficient renewable energy power supply system, which can solve their basic power consumption problems.

First of all, when the solar energy module is connected to the solar power grid, the photovoltaic module is connected to the solar power grid at night It can also support the municipal power input (or diesel generator) as supplementary energy to power the load.

The design of photovoltaic off grid system is different from grid connected power generation system. It needs to consider the user's load size, daily power consumption, local climate conditions and other factors. It is relatively complex to choose different design schemes according to the actual needs of customers. In order to ensure that the off grid system can work reliably, it is very necessary to do a good job of customer demand investigation in the early stage.