1. Verify if the battery pack is exposed to rainy or humid weather. If it is, there is no need to be concerned about the leakage current.

2. Inspect the battery pack and AC/DC wiring for any signs of poor contact.

3. Verify the settings of the APP protection values.

4. If no issues are found after performing the above checks, promptly contact your service provider or installer for further assistance.

1. Check if the ambient temperature around the inverter is excessively high.

2. Ensure that the machine is placed in a well-ventilated area.

3. Verify that the machine is not exposed to direct sunlight; if it is, provide appropriate shading.

4. Inspect the fan to ensure it is functioning properly. If the fan is not working correctly, replace it.

5. If the above checks do not identify any issues, promptly contact your service provider or installer for further assistance.

1-) Check the insulation impedance of the PV string output to the ground: Inspect the DC input's insulation status to the ground, which includes checking for PV cable damage, short circuits, water infiltration at connection terminals, etc. You can also unplug the PV string from the inverter end and use a multimeter to measure whether the positive and negative voltages to the ground are abnormal. Normal voltage should show a balanced reading between the positive and negative poles (balanced jumps or small absolute value deviations).

2-) If it has confirmed that the impedance is indeed lower than the default set value in the local environment on rainy days, consider adjusting the insulation resistance protection settings.

3-) Check for any unintended interconnection between the PV string with low insulation resistance and other PV strings or inverters. Ensure the PV string connections are correct and not mixed up with other PV strings connected to different inverters.

By following these steps, you can address low insulation resistance issues and ensure the safety and proper functioning of the PV system.

PV voltage is too high: The PV voltage refers to the open-circuit voltage of the solar panel string. Different inverters have varying DC voltage input ranges, so the configuration of the number of solar panels in the string needs to be adjusted. based on the inverter's DC voltage input range. If the "PV voltage is too high" alarm occurs, it is likely because the number of solar panels in the string exceeds the inverter's DC voltage range.

Solution:

 Check the inverter's parameters, particularly the input voltage range. Use a multimeter set to the DC voltage mode to measure the PV voltage of the string. Connect the red probe to the positive terminal and the black probe to the negative terminal of the string. Ensure that the multimeter reading falls within the inverter's rated input range. Verify the actual number of solar panels connected to the string.

PV voltage is too low: The reasons for low PV voltage may include having too few solar panels in the series, reversed positive and negative connections in some strings, loose terminals, poor contact, or broken strings.

Solution:

Use a multimeter set to the DC voltage mode to measure the PV voltage of the string. Connect the red probe to the positive terminal and the black probe to the negative terminal of the solar string. Ensure that the multimeter reading falls within the inverter's rated input range. Verify the actual number of solar panels connected to the solar string.

By following these steps, you can effectively address PV voltage issues and ensure the proper functioning of the solar power system.

1. Check for any abnormal voltage or current phenomena in the inverter to identify the cause of the alarm.

2. Please check if any obstructions are blocking the components of the alarm. If there are any, please remove them and ensure that the components are clean.

3. Inspect the wiring of the solar panels to see if they are loose. If so, re-plug and secure the connections to ensure reliability.

4. Check if the DC fuse is damaged. If it is, replace the fuse with a new one.

By following these steps, you can effectively troubleshoot and resolve abnormal alarms related to PV.

1. If the alarm occurs occasionally, it may be due to a short-term power grid abnormality. Once the power grid returns to normal, the equipment will resume its operation without manual intervention.

2. If all microinverters in the power station frequently report island alarms, please contact the power authority to confirm whether there is indeed an islanding phenomenon and resolve it.

3. If the issue persists and cannot be resolved, please try contacting the equipment manufacturer or dealer for further assistance.

1. If the alarm occurs occasionally, it may be due to a short-term power grid abnormality. Once the power grid returns to normal, the equipment will resume its operation without manual intervention.

2. If the alarm occurs frequently, please check whether the grid frequency is within the allowable range. If it is significantly higher or lower than the normal range, please contact the local power authority. You may need to obtain their approval before adjusting the over frequency or underfrequency limit through the monitoring platform.

1. If it occurs occasionally, it may be due to a short-time power grid abnormality. When the power grid returns to normal, the equipment will resume work without manual intervention

2. If the alarm occurs frequently, check the AC side wiring for any abnormalities.

3. If the on-site wiring and on-site power grid are normal, please contact the dealer.

Check if the ambient temperature at the installation location of the microinverter exceeds the minimum allowed ambient temperature.

If the temperature exceeds the allowed range, improve the installation environment.

If the surrounding conditions are normal, please get in touch with the dealer or supplier of the equipment for additional help.