Learn about GoodWe isolation failures and how to troubleshoot ground faults effectively.
Isolation failures can occur due to ground faults, moisture ingress, or damaged wiring. Regular maintenance can help prevent these issues.
To test for ground faults, use a multimeter to check resistance between the ground and live wires. This will help identify any faults.
Isolation failure occurs when the inverter detects a ground fault, which can happen if there is a low-resistance path from the DC side to ground. This is typically identified through insulation resistance measurements (RISO), which should meet or exceed the manufacturer's specified threshold. If RISO falls below this threshold, the inverter's internal safety mechanisms will trigger a fault to prevent potential electric shock or fire hazards. The inverter continuously monitors the insulation resistance to ensure safe operation, and any deviation from normal operating parameters will result in a fault condition.
Users may observe the inverter's LED indicator flashing a fault code related to isolation failure, or they may receive alerts via the monitoring app indicating a drop in production. Additionally, the inverter may stop producing power altogether, and system performance metrics will reflect unusually low output.
Always consult a licensed electrician or certified solar installer when performing troubleshooting or repairs on solar systems to ensure safety and compliance with local electrical codes.
To prevent future isolation failures, conduct regular maintenance checks on all wiring and connectors, ensuring they are free from moisture and physical damage. Implement protective measures such as surge protection devices and ensure proper grounding of the entire solar array. Additionally, select high-quality components that meet or exceed NEC standards during system.