Learn how to troubleshoot and resolve the issue of no DC power in your Sungrow inverter.
Common causes include issues with the solar panels, wiring, or inverter settings. Inspect connections and ensure panels are receiving sunlight.
You can test the inverter by checking the display for error codes and ensuring it is properly connected to the solar array.
The 'No DC Power' condition typically indicates that the inverter is unable to detect sufficient voltage from the solar array. This can occur due to several factors, including RISO measurement failures, where the insulation resistance is too low, triggering the inverter's ground fault detection. Additionally, if the utility grid's voltage or frequency falls outside acceptable limits, the inverter will shut down to protect both itself and the system.
If your Sungrow inverter shows 'No DC Power', you may observe the following: the LED indicators on the inverter may be off or flashing, the monitoring app may display a fault alert, and there may be a significant drop in energy production metrics compared to previous days.
Always consult a licensed electrician or certified solar installer when performing maintenance or troubleshooting on your solar system to ensure safety and compliance with electrical codes.
To avoid future occurrences of 'No DC Power', regularly clean the solar panels and inspect the array for shading. Perform routine maintenance checks on the wiring and connections, ensuring they are secure and intact. Regularly review inverter settings and keep firmware updated to mitigate configuration issues. Additionally, monitor the utility grid conditions to anticipate potential disruptions.