Photovoltaic inverter fault code 302

Fault 302 indicates that the PV insulation resistance is low. Turn off the “SOLAR SUPPLY MAIN SWITCH” or the AC isolator. The “SOLAR SUPPLY MAIN SWITCH” is usually in the switchboard.

The inverter has reduced its power due to a too-high grid voltage to ensure grid stability. If possible, check the grid voltage and observe how often fluctuations occur.

Low Insulation Resistance Error (039 for Grid-Connected and 302 for Hybrid Inverters) indicates that there could be an Earth Fault in the PV array.

Check whether the ambient humidity of PV components is too high. Check whether the "PE" cable and the N cable are well-contacted. Contact Sungrow if fault reoccurs. Did you find it helpful? Yes No

Photovoltaic inverter fault code 302 [PDF] Chat with us

6 FAQs about [Photovoltaic inverter fault code 302]

What causes a PV inverter error code?

The error may be caused either by the inverter itself or by other PV components or external factors. Inverters are programmed to detect faults and display error codes. Understanding the significance of error codes and their corresponding meanings is absolutely vital when it comes to troubleshooting the issue.

What are solar inverter error codes?

Solar inverter error codes are alphanumeric symbols displayed by your inverter to notify you of an issue disrupting your solar system’s normal operations. Solar inverters are devices that convert DC power from a solar panel into AC power when electricity is generated for use in homes or offices.

What is a 502 & 522 error in a solar inverter?

502 – Solar panel insulation error. Overcurrent faults usually are short-term issues, and your inverter will resolve them automatically. Insulation errors require technical support if they persist. 522 – DC1 input voltage too low.

What are Fronius inverter error codes?

Fronius inverter error codes are a shortcut toward troubleshooting and fixing your device without having to consult an expert solar installer. The inverter’s self-diagnosis features allow it to monitor the performance of solar PV systems and provide real-time reports.

What happens if an inverter error is not addressed?

If these errors are not addressed, they can cause permanent damage to your inverter. An error in the inverter doesn’t necessarily mean the entire system is faulty. The error may be caused either by the inverter itself or by other PV components or external factors. Inverters are programmed to detect faults and display error codes.

What is a Sungrow inverter error code?

They are simple to identify and straightforward to interpret with the right guidance. An inverter error code is typically an alphanumeric or numerical number that indicates a PV system issue. So, to understand the Sungrow inverter problems, you need to know how to read solar inverter displays.

Photovoltaic inverter fault code 302