The Home Energy Storage System will be connected to the photovoltaic PV, and then to be connected to the battery. The photovoltaic can be used for its use, and the surplus electricity will be connected to the Internet. The excess can be stored in the system. When there is no photovoltaic at night, the battery and the mains can supply power to the home at the same time. If there is no grid, the battery can supply power to the load.
In the off-grid state, the installation of home storage can solve the 24-hour power supply. In the grid-connected state, the residential battery energy storage system can be used as a backup power supply to connect to loads to ensure the safety of household electricity. It can also be charged to the mains during valley hours and discharged during peak hours to obtain more benefits by taking the price difference between peak and valley. In Europe, such as Germany, Italy, and the United Kingdom, where electricity prices are high.
The most basic function of home storage is to have the function of charging and discharging. In the process of electricity use, it can peak cut, and be able to compatible with the off-grid operation. Excess energy can be accessed and stored.