Learn how to address a critical ground fault detected in Sungrow inverters effectively.
A ground fault indicates an unintended connection between the electrical system and the ground, which can cause safety hazards and equipment damage.
To troubleshoot, check for damaged wiring, ensure proper grounding, and inspect all connections for moisture or corrosion.
The Sungrow inverter employs ground fault detection to ensure safety and operational integrity. This mechanism continuously measures insulation resistance (RISO) between the array's conductors and the ground. If the insulation resistance drops below a predetermined threshold, typically 1 MΩ, the inverter triggers a ground fault alarm. This can occur due to moisture ingress, damaged wiring, or degraded components, which can create a conductive path to ground, posing risks of electric shock or fire. The inverter’s internal logic prioritizes safety by disconnecting from the grid to prevent further damage or hazards.
When a ground fault is detected by a Sungrow inverter, users may observe specific LED patterns indicating fault status, such as a red LED blinking or solid illumination. Additionally, monitoring apps may send alerts indicating a production drop or inverter shutdown, often accompanied by a fault code related to ground issues. System performance may be significantly reduced, with energy production dropping to zero or near-zero levels.
Always follow safety protocols and consult a licensed electrician or certified solar installer when dealing with electrical components to ensure safe handling and compliance with local codes.
To prevent future ground faults, ensure regular maintenance of the solar array, including visual inspections for moisture and damage. Use high-quality components rated for the environment in which they are installed. Implement proper grounding practices as per NEC guidelines and ensure that all connections are secure and weatherproofed. Regularly monitor system performance through a monitoring platform to detect anomalies early.