1. Confirm whether the battery is in a normal power-on state, and confirm whether the battery fault light is on;

2. Confirm whether the communication line between the battery and the inverter is intact and whether the communication line is damaged;

3. If all of the above are confirmed, please contact your service provider or installer as soon as possible.

1. If you notice that the inverter's red light is on, the first step is to check the status of other indicator lights on the inverter and refer to the indicator labels or the user manual to make an initial assessment.

2. If you're still unable to determine the problem, it's recommended to fill out a fault repair form and send it to your service provider or installer. The form should include details such as the machine model, product serial number, and a description of the problem.

3. Once you identify the problem, get in touch with your service provider or installer to address the issue as soon as possible.

The inverter ground and the chassis ground should not be connected at the same point. They need to be separated. The inverter ground serves as a working ground, which maintains a stable voltage relative to the ground during normal operation, ensures accurate measurements of relatively low voltages in the primary system, and discharges lightning current to the ground during lightning strikes. On the other hand, the chassis ground functions as a protective ground, designed to ensure personal safety and reduce the risk of accidents in electrical engineering applications.

A DC arc fault occurs when a loop is formed in the string, resulting in a current output that leads to an arc. This can happen due to various reasons, such as the inverter being operational while directly plugging and unplugging the string, short-circuits between the positive and negative poles of the strings, reversing the polarity of the connections, or having an imbalance in the number of series battery panels.

Solution: To address DC arc faults, follow these steps:

1. Before plugging and unplugging the string, ensure that the inverter has been turned off normally to avoid any arc faults during the process.

2. Check for any instances of positive and negative short-circuits within the string and ensure proper polarity of the connections before connecting to the inverter.

3. When connecting various strings with properly connected positive and negative poles, as well as strings with reversed connections, to the same MPPT input of the inverter, it is important to be aware of the potential for a short-circuit arc to occur. This can happen when positive and negative polarities are mixed, resulting in a short-circuit condition and the formation of an arc.

4. Make sure that you have an equal number of solar panels in each string when connecting them to the inverter. This will help ensure that there is no current flow between the strings that could cause arc faults when plugging or unplugging them. It's important to balance the strings properly to avoid any potential safety hazards.

To address the issue of string current back-feeding in a photovoltaic system, it is recommended to follow the steps below:

1. Check if there is a difference in the number of solar panels between the affected string and other strings. If there is, wait until the photovoltaic (PV) string current drops below 0.5A, disconnect the DC switch and adjust the solar panel configuration in that string.

2. Inspect if any solar panels in the string are obstructed or shaded.

3. Once the PV string current drops below 0.5A, disconnect the DC switch and check if the open circuit voltage of the string is unusual. If there are any abnormalities, examine the wiring and configuration of the solar panels in that string.

4. Verify if there are any abnormalities in the orientation of the solar panels in the string.

Anti-island protection refers to a safety feature implemented in inverters to prevent the formation of islands during grid disconnection. An island occurs when the inverter and the local load continue to operate independently after the power grid is disconnected, posing safety hazards. To comply with grid-connected standards, the inverter should automatically stop its output within a specified time to prevent the formation of islands and ensure the safety and stability of the overall power system.

The following operations need to be carried out on the inverter during the grid connection process:

You should make sure that the AC and DC side wiring of the inverter is correct and that the DC string voltage is normal. Also, set the corresponding grid parameters and check that the AC side voltage of the inverter is normal after completing the AC side grid connection operation. Once you have completed these steps, turn on the inverter's DC switch and it will automatically detect the AC and DC side environment and complete the grid connection.

If you find that the temperature is too high, here are some steps you can take to address the issue.

1. Make sure that the ventilation in the inverter's installation location is adequate, and check that the inverter fan is functioning properly.

2. Take a look at the inverter's temperature-related parameters and analyze the operating data to see if there are any overtemperature alarms or relevant temperature data recorded in the detection system.

3. Inspect the inverter's installation to see if there is any direct sunlight irradiation, as this could contribute to high temperature readings.