Learn about SolarEdge Error Code 18x38, its meaning, causes, and solutions for high AC voltage issues.
Error Code 18x38 indicates that the AC voltage is too high on one or more lines. This can lead to system shutdowns or performance issues.
To troubleshoot, check the voltage levels at the inverter and ensure they are within acceptable limits. Inspect the connections and wiring for any faults.
The SolarEdge inverter monitors the AC voltage input to ensure it operates within specified limits. When the input voltage exceeds the inverter's maximum threshold, the inverter triggers the fault code 18x38 to prevent damage. This safety mechanism is crucial, as excessive AC voltage can lead to overheating and failure of internal components. The inverter continuously assesses the line voltage against grid frequency limits, and any deviations can result in automatic shutoff to protect both the inverter and the connected solar array.
Homeowners may notice that the inverter's LED indicator is flashing a fault code 18x38, indicating an AC voltage issue. In the monitoring app, there may be alerts showing reduced power production or a complete halt in energy generation. Additionally, the system may not respond to commands for restarting or resetting.
Always consult with a licensed electrician or certified solar installer when diagnosing electrical issues. Working with high voltage systems can be dangerous and should only be performed by qualified licensed technicians.
To avoid future occurrences of this fault, ensure regular maintenance checks are performed on the inverter and associated wiring. Implement surge protection devices to safeguard against transient voltage spikes, and keep the inverter's firmware updated to benefit from the latest performance enhancements and safety features. Regularly monitor the AC voltage levels from the Utility Grid, especially during peak production hours, to identify patterns that may lead to overvoltage conditions.