Learn how to troubleshoot and resolve Sungrow Error Code 106 related to PV string reverse polarity.
Error Code 106 indicates a reverse polarity issue in the PV string. This can lead to system inefficiencies and potential damage.
To prevent reverse polarity issues, ensure proper wiring and connections during installation. Regular maintenance checks can also help identify potential problems.
Error 106 typically indicates a reverse polarity condition detected by the inverter. This occurs when the positive and negative leads of the photovoltaic (PV) strings are incorrectly connected, leading to an abnormal voltage input. The inverter continuously monitors the insulation resistance (RISO) and can identify discrepancies in expected voltage levels. If the measured voltage is negative or outside of acceptable parameters, the inverter will trigger this fault to protect itself and the array from potential damage.
When facing Error 106 on a Sungrow inverter, users may observe the inverter's LED indicator flashing in a specific pattern, often accompanied by alerts on the monitoring app indicating a fault. System performance may drop significantly, with energy production halting or showing zero output despite sunlight availability.
Working on solar electrical systems can be hazardous. Always ensure that any work performed is conducted by a licensed electrician or certified solar installer to maintain safety and compliance with local electrical codes.
To prevent future occurrences of Error 106, ensure that all wiring is performed by a qualified technician, adhering strictly to the manufacturer's specifications. Regularly inspect connections and cables for wear and tear, and perform routine maintenance checks on the inverter's firmware and performance metrics.