Learn how to troubleshoot a Sungrow Power Stage Error effectively with this guide.
Common causes include communication issues, hardware malfunctions, or configuration errors in the inverter.
To reset the inverter, turn off the power supply, wait for a few minutes, and then turn it back on.
A power stage error in a Sungrow inverter typically indicates a malfunction in the inverter's ability to convert DC from the solar array to AC for the utility grid. This fault can be triggered by various electrical logic issues, such as an insulation resistance measurement (RISO) falling below acceptable thresholds, which suggests potential leakage currents that could lead to ground faults. The inverter's ground fault detection system may activate to prevent unsafe conditions. Furthermore, if the grid frequency exceeds or falls below the inverter’s operational limits, it will disconnect to protect both the inverter and the connected systems.
Homeowners may notice a sudden drop in energy production as reported by the monitoring app. The inverter's LED indicators may show a fault condition, often blinking in a specific pattern that indicates a power stage error. Additionally, the inverter may display error codes on the screen, indicating the nature of the fault.
Always consult a licensed electrician or certified solar installer when performing maintenance or troubleshooting on solar inverter systems to ensure safety and compliance with local electrical codes.
To prevent future power stage errors, regularly inspect the solar array and inverter for signs of wear, moisture, or damage. Ensure that the system site has adequate ventilation and that the inverter’s cooling systems are functioning properly. Conduct periodic insulation resistance testing and maintain proper string voltage levels. Keeping wiring connections clean and secure will also help prevent faults.