Learn about Growatt Error Code 128, its meaning, causes, and solutions for DC injection issues.
Error Code 128 indicates that the DC injection level is too high, which can affect system performance. It is crucial to address this issue to ensure safe operation.
To troubleshoot DC injection problems, check the inverter settings and ensure proper grounding. Additionally, inspect the wiring for any faults or damage that could cause excessive DC injection.
Error 128 indicates that the inverter has detected excessive DC injection, which can occur when the input voltage from the solar array exceeds safe operational limits. This condition may arise from several factors, including improper string configuration, ground faults, or degradation of insulation resistance. The inverter monitors the DC input continuously, and if it identifies voltage levels that surpass its design specifications, it triggers the fault to protect both the inverter and the connected electrical system from potential damage or hazards.
When the Growatt inverter experiences Error 128, users typically observe the following symptoms: the inverter LED may flash red or display a fault indicator on the monitoring app. Additionally, there may be a noticeable drop in power production, with the app showing zero output or significantly reduced performance compared to normal operational levels. This fault may also trigger alert notifications, indicating a DC injection issue.
Always consult a licensed electrician or certified solar installer when diagnosing or repairing issues related to the inverter or solar array to ensure compliance with safety standards and regulations.
To prevent future occurrences of Error 128, ensure proper system practices by following the manufacturer's guidelines for string configurations. Regularly inspect the solar array for shading or debris that may cause voltage imbalances. Implement routine maintenance checks on the inverter and wiring to identify wear or degradation early. Additionally, keep the inverter firmware updated to benefit from the latest performance enhancements and fault detection improvements.