What should I pay attention to when buying solar wall mounted battery storage? Now, solar livestock batteries are mainly used in grid connected and off grid systems. What's the difference between the two? ZXDY lithium battery manufacturer tells you.

Grid connection: a power generation system that must be connected to the public grid, that is, solar power generation, home grid, and public grid, and must rely on the existing grid to operate. The grid connected photovoltaic power station has no electric energy storage device and is directly converted to the voltage required by the national grid through the inverter.
Off grid: also called independent photovoltaic power wall battery 10kw station, it is a power generation system that operates independently without relying on the grid. 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. This is a repetitive charging and discharging process. The system must be equipped with a battery.
Why choose off grid power supply system?
The off grid power supply system is designed for use in areas without power grid or in places with frequent power outages. It is a rigid demand. It relies on the working mode of "storage while use" and "storage before use" to provide users with help and services of "providing timely assistance".
The system is independent of the power grid and operates independently without geographical restrictions. It can be installed and used as long as there is sunlight. It is widely used in remote areas without power grid, islands, fishing boats, communication base stations, street lamps, outdoor breeding bases and other places. It can also be used as emergency power generation equipment in areas with frequent power outages.
Function of home energy storage battery
In the photovoltaic off grid system, the energy storage battery occupies the main part. Its main task is to store energy, ensure the stability of system power, and ensure the load power consumption at night or in rainy days.
Energy storage function: The photovoltaic power generation time and load power consumption time are not necessarily synchronized. The photovoltaic off grid system can generate power only when there is sunshine. The power generation power reaches the maximum at noon, but the power demand is not high at noon. Many off grid power stations for household use only use power at night. Therefore, the electricity generated during the day needs to be stored by the battery first, and then released at the peak of power consumption.
Stable system power: photovoltaic power generation power and load power are not necessarily the same. Photovoltaic power generation is affected by radiation and is in a fluctuating state, and the load side is not very stable. The starting power is greater than the daily operating power of the load terminal. If the photovoltaic power generation terminal is directly connected to the load, it is easy to cause system instability and voltage fluctuation. The energy storage 20 kwh battery pack is now a power balancing device. When the photovoltaic power is greater than the load power, the controller sends the excess energy to the battery pack for storage. When the photovoltaic power cannot meet the load demand, the controller sends the electrical energy of the battery to the load.