Learn how to troubleshoot and fix the Sungrow Bypass Fault during power outages.
A Bypass Fault can occur due to issues with the inverter's bypass diodes or during power outages. It's essential to check the connections and the inverter's settings.
Regular maintenance and monitoring of the inverter can help prevent Bypass Faults. Ensure that the system is installed correctly and that all components are functioning properly.
The Sungrow inverter employs advanced diagnostic algorithms to monitor the integrity of the solar array and associated wiring. When it detects anomalies such as low insulation resistance (RISO) or ground faults, it triggers a bypass fault to prevent potential damage or hazards. This fault can occur if the insulation resistance falls below the NEC-recommended threshold, indicating possible degradation or failure in the wiring or components. Additionally, the inverter may also respond to overvoltage conditions or grid frequency fluctuations, especially during power outages, which can lead to erroneous fault detection.
During a power outage, you may observe the Sungrow inverter displaying a bypass fault message. The LED indicators may flash in a specific pattern, and the monitoring app may show a significant drop in energy production, indicating that the inverter has ceased operation to protect the system.
Always consult a licensed electrician or certified solar installer when diagnosing or repairing solar equipment to ensure compliance with safety standards and local codes.
To avoid future bypass faults, conduct regular maintenance checks on wiring and connections, ensuring they are secure and free from damage. Implement routine insulation resistance testing and monitor string voltages to catch discrepancies early. Keeping the inverter firmware updated will also help mitigate potential errors in fault detection.