Solar inverters are important in solar power generation systems. They convert the direct current generated by solar panels into alternating current for home or commercial use. However, during use, the inverter may have various alarm conditions, affecting the normal operation of the system.

Common causes of solar inverter alarms

1. Abnormal DC input voltage

2. Abnormal AC output voltage

3. Overload protection

4. Short circuit protection

5. Overheat protection

6. Abnormal battery voltage

7. Communication failure

1. Abnormal DC input voltage

(1) DC input voltage is too high: When the output voltage of the solar panel exceeds the rated input voltage of the inverter, the inverter will issue an overvoltage alarm. This may be caused by unreasonable configuration of the solar panel or too low rated input voltage of the inverter.
Solution: Check the configuration of the solar panel to ensure that its output voltage is within the rated range of the inverter. If the rated input voltage of the inverter is too low, consider replacing the inverter.

(2) DC input voltage is too low: When the output voltage of the solar panel is lower than the starting voltage of the inverter, the inverter will issue an undervoltage alarm. This may be caused by insufficient output power of the solar panel or too high starting voltage of the inverter.
Solution: Check the output power of the solar panel to ensure that it meets the starting requirements of the inverter. If the starting voltage of the inverter is too high, you can consider replacing the inverter.

2. Abnormal AC output voltage

(1) AC output voltage is too high: When the AC voltage output by the inverter exceeds the rated voltage, the inverter will issue an overvoltage alarm. This may be caused by grid voltage fluctuations or improper output voltage regulation of the inverter.
Solution: Check the grid voltage to ensure that it is within the rated range of the inverter. If the grid voltage fluctuates greatly, consider installing a voltage stabilizer. At the same time, check the output voltage regulation setting of the inverter to ensure that it is correct.

(2) AC output voltage is too low: When the AC voltage output by the inverter is lower than the rated voltage, the inverter will issue an undervoltage alarm. This may be caused by improper output voltage regulation of the inverter or grid voltage fluctuations.
Solution: Check the output voltage regulation setting of the inverter to ensure it is correct. If the grid voltage fluctuates greatly, you can consider installing a voltage stabilizer.

3. Overload protection

When the output power of the inverter exceeds the rated power, the inverter will issue an overload alarm. This may be caused by excessive load or too small rated power of the inverter.
Solution: Check the size of the load to ensure that it is within the rated power range of the inverter. If the load is too large, you can consider reducing the load or increasing the rated power of the inverter.

4. Short circuit protection

When a short circuit occurs at the output end of the inverter, the inverter will issue a short circuit alarm. This may be caused by a line fault or an internal fault in the inverter.
Solution: Check the line to ensure that there is no short circuit. If there is no problem with the line, it may be an internal fault in the inverter, and you need to contact us

5. Overheat protection

When the temperature of the inverter exceeds the rated temperature, the inverter will issue an overheat alarm. This may be caused by too high ambient temperature or poor heat dissipation of the inverter.
Solution: Check the ambient temperature to ensure that it is within the rated range of the inverter. If the ambient temperature is too high, you can consider adding heat dissipation equipment. At the same time, check the heat dissipation system of the inverter to ensure that it works properly.

6. Abnormal battery voltage

When the battery voltage exceeds or falls below the rated voltage of the inverter, the inverter will issue an abnormal battery voltage alarm. This may be due to battery aging or improper inverter rated voltage setting.
Solution: Check the battery status to ensure that it is in good working condition. If the battery is aging, you can consider replacing the battery. At the same time, check the rated voltage setting of the inverter to ensure that it is correct.

7. Communication failure

When the communication between the inverter and the monitoring system fails, the inverter will issue a communication failure alarm. This may be due to a communication line failure or an internal fault in the inverter.
Solution: Check the communication line to ensure that it is not faulty. If there is no problem with the communication line, it may be an internal fault in the inverter and you need to contact us