Learn how to troubleshoot a blank screen on your Sungrow inverter with a lit wifi dongle.
First, check the power supply to the inverter. Ensure that it is properly connected and receiving power. If the issue persists, consider resetting the inverter.
A blue light on the wifi dongle typically indicates that it is connected to the network. This suggests that the issue lies with the inverter display rather than the wifi connection.
A blank screen on a Sungrow inverter can indicate a failure in the inverter's ability to process or display information. This could be due to various internal checks failing, such as insulation resistance testing (RISO) or ground fault detection. If the inverter detects a ground fault or an unsafe condition, it may initiate a shutdown to protect the system. Additionally, if the DC input voltage from the Array falls below the inverter's threshold, it may fail to power on the display while still indicating power via the WiFi connectivity. The inverter's firmware may also play a critical role; if it becomes corrupted or outdated, it may not function correctly.
The inverter display is completely blank, with no visible information or alerts. However, the WiFi dongle is illuminated with a steady blue light, indicating that the device is powered and attempting to communicate. There are no production readings visible on the monitoring app, and there may be a noticeable drop in energy production.
Always consult a licensed electrician or certified solar installer before performing any troubleshooting or repairs on solar inverter systems.
To avoid future occurrences of a blank screen, ensure regular maintenance checks on the inverter, including firmware updates and inspections of the Array voltage levels. Maintain clean and unobstructed airflow around the inverter to prevent overheating, and routinely check all electrical connections for wear or corrosion.