Grid connection means that it must be connected to the public grid, that is, solar power generation, home grid and public grid are connected together. This is a power generation system that must rely on the existing grid to operate. It is mainly composed of solar panels and inverters. The solar panels send out 220V AC power which is directly converted to the inverter and supplies power to the household appliances. When the solar power generation exceeds the power used by the household appliances, the excess power is transmitted to the public grid; When the solar power generation can not meet the use of household appliances, it will be automatically supplemented from the grid. The whole process is intelligently controlled without manual operation.

Off grid is a power generation system that operates independently of the power grid, mainly consisting of solar panels, energy storage batteries, charge and discharge controllers, inverters and other components. The electricity from the solar panel directly flows into the battery and is stored. When it is necessary to supply power to the electrical appliances, the DC current in the battery is converted into 220V AC through the inverter, which is a repetitive charging and discharging process. This kind of power generation system is widely used because it is not limited by the region. It can be installed and used wherever there is sunshine. Therefore, it is very suitable for remote areas without power grid, islands, fishing boats, outdoor breeding bases, etc., and can also be used as emergency power generation equipment in areas with frequent power outages.

The off grid household energy storage system is divided into three working modes:

1、 PV provides energy storage and user electricity (sunny days);

2、 Photovoltaic and energy storage batteries provide users with electricity (cloudy days);

3、 The energy storage battery provides users with electricity (in the evening and in rainy days).

The customization of portable household energy storage lithium battery pack system is very flexible, and lithium battery manufacturers can customize energy storage systems with different voltages and capacities according to customer needs. The household lithium battery pack has a service life of more than 10 years. With modular design, multiple energy storage units can be connected in parallel more flexibly. It is simple and fast, and can greatly improve the storage and utilization of energy.