Sungrow’s hybrid inverter, particularly the SH15/20/25T models, are renowned for their efficiency and reliability in converting and managing solar energy in residential settings. However, like all sophisticated electronic equipment, they can encounter issues such as grid overvoltage, which can disrupt their operation. This blog post provides a guide on how to troubleshoot grid overvoltage issues to ensure your Sungrow hybrid solar inverter maintains optimal performance.
## Understanding Grid Overvoltage
Grid overvoltage occurs when the voltage in the electrical grid exceeds the levels for which devices are rated or configured to handle. This can be harmful to electrical appliances and may cause solar inverters to disconnect from the grid to protect themselves and the household electrical system.
### Common signs of Grid Overvoltage:
– The inverter frequently disconnects from the grid.
– The inverter displays error codes related to overvoltage.
– Lights in the home flicker or appear unusually bright.
## Step-by-Step Troubleshooting Guide
### Step 1: Measure the Actual Grid Voltage
Using a reliable multimeter or another voltage measuring device, check the voltage of the grid supply at the point where the inverter connects. This measurement will help determine if the grid voltage consistently exceeds the normal operating range which is typically between 230V and 240V for most residential areas, although this can vary based on local standards.
### Step 2: Contact the Local Electric Power Company
If your measurements confirm that the grid voltage is higher than it should be, the next step is to contact your local electric power company. High grid voltage could be a result of issues within the broader power supply system. Report your findings and request them to adjust the grid voltage to within acceptable limits.
### Step 3: Check and Adjust Protection Parameters
Access the protection settings of your Sungrow hybrid solar inverter either through the dedicated App or the LCD on the unit itself:
– **Via the App**: Navigate to the settings or system parameters section where you can view and adjust the overvoltage thresholds.
– **Via the LCD**: Use the interface on the inverter to navigate to the system settings and locate the voltage protection parameters.
With the consent of your local electrical grid operator, adjust the overvoltage protection values to ensure they are appropriate for the actual grid conditions. This step ensures that your inverter will not disconnect prematurely and continues to operate efficiently under the local grid conditions.
### Step 4: Contact Sungrow Support
If after taking these steps, the grid overvoltage issue persists, it is advisable to reach out to Sungrow for further assistance. Provide them with all relevant information including the voltage measurements and any changes made to the settings. Sungrow’s technical support can provide more detailed guidance, and if necessary, dispatch a service technician to resolve the issue.
## Conclusion
Dealing with grid overvoltage issues requires a methodical approach to ensure that your solar energy system continues to function effectively without frequent disruptions. By following these steps, you can help mitigate issues related to grid overvoltage and maintain the efficiency and longevity of your Sungrow SH15/20/25T hybrid solar inverter. Remember, working with high voltage electricity can be dangerous, so if you are unsure about performing any checks or adjustments yourself, it is best to consult with or hire a professional electrician.
