Learn about Growatt error code 122, its meaning, causes, and solutions for your inverter.
Error code 122 typically indicates a bus voltage issue in the inverter. This can affect the overall performance and efficiency of the solar system.
To troubleshoot error code 122, check the voltage levels and connections. Ensure that all wiring is secure and that the inverter is functioning properly.
The Growatt inverter triggers error 122 when it detects that the bus voltage is outside acceptable limits. This can be due to insufficient voltage from the solar array, which may occur if the total output from the strings is not adequate. The inverter continuously monitors the input voltage and performs ground fault detection and insulation resistance measurements. If these checks reveal anomalies, the inverter will shut down to prevent damage, which is a critical safety feature.
When the Growatt inverter displays error 122, users may notice a red LED indicator flashing or a persistent alert on the monitoring app indicating a bus voltage error. This can be accompanied by a significant drop in energy production, as the inverter may cease operation to protect itself from damage.
Always consult a licensed electrician or certified solar installer when performing diagnostics or repairs on your solar system to ensure safety and compliance with local codes.
To avoid encountering error 122 in the future, ensure regular cleaning and maintenance of the solar array. Schedule periodic inspections of electrical connections and perform insulation resistance tests annually to detect potential ground faults early. Additionally, keep the inverter firmware up to date and monitor system performance closely to catch issues before they escalate.