The most comprehensive guide to inverter error codes along with their solutions


Inverters have become an essential part of our daily lives, powering everything from our homes to our workplaces. They provide a critical link between the electricity grid and our appliances, ensuring a smooth and uninterrupted power supply. However, like all electrical devices, inverters can encounter issues and malfunctions, leading to frustrating disruptions in your power source. Understanding inverter error codes and how to troubleshoot them is crucial for maintaining a reliable power supply.

This comprehensive guide is designed to demystify the world of inverter error codes, offering a detailed overview of the most common issues you may encounter and the solutions to rectify them. By the end of this article, you’ll be well-equipped to diagnose and resolve inverter errors, ensuring a seamless power supply for your home or business.


Common Types of Inverter Error Codes

Inverter error codes can vary depending on the make and model, but there are some common error codes you may encounter. Here are a few examples:

Error Code

the reason

Error Code 101

Input Voltage Too Low

Error Code 202


Error Code 303

Output Voltage is too high.

Error Code 404

DC Bus Overvoltage

Error Code 505

Grid Fault

Error Code 606

Communication Error

Error Code 707

Inverter Overload


Now, let’s delve into each of these error codes and explore the solutions.


Inverter Error Code Solutions

1. Error Code 101: Input Voltage Too Low

This error typically occurs when your inverter doesn’t receive a sufficient voltage input from your power source. It can happen for various reasons, such as a weak solar panel output or a grid power issue. To resolve this error:



  • Check the solar panel output for obstructions like dirt, leaves, or shading. Clean the panels if necessary.
  • Verify that your grid power supply is stable. Contact your utility company if you suspect a grid issue.
  • If the issue persists, contact a qualified technician to inspect and repair your inverter.


2. Error Code 202: Overheating

Inverters can overheat due to high ambient temperatures or improper ventilation. Overheating can cause serious damage to your inverter, and if not resolved promptly, it can lead to complete failure. Here’s what you can do:


  • Ensure that your inverter is installed in a well-ventilated area with sufficient airflow. Remove any obstructions near the inverter.
  • Check if the ambient temperature exceeds the inverter’s specified operating range. If so, consider adding a cooling system or relocating the inverter to a cooler spot.
  • If the error persists, contact a professional technician to inspect and service your inverter.


3. Error Code 303: Output Voltage Too High


error code inverter Output Voltage Too High

This error indicates that the inverter is producing a higher output voltage than the allowed limit. It can damage your appliances and pose a safety risk. To address this error:


  • Check the inverter’s settings and ensure they are configured correctly, adhering to the voltage limits.
  • If the error persists, it may be a faulty internal component. Contact a qualified technician to diagnose and repair the issue.


4. Error Code 404: DC Bus Overvoltage

When the DC bus voltage in the inverter exceeds the safe limit, it triggers error code 404. This issue can be a result of a malfunction in the inverter or external factors. Here’s how to deal with it:



  • Turn off the inverter immediately to prevent further damage.
  • Check the wiring and connections for any loose or damaged parts.
  • If the issue persists, consult a professional technician to inspect and repair the inverter.


5. Error Code 505: Grid Fault

This error suggests a problem with the grid connection, which could be due to issues with your utility provider or an internal inverter fault. To resolve it:


  • First, check if your utility provider is experiencing grid issues by contacting them or visiting their website.
  • If the grid is stable, it could be an inverter problem. Contact a technician to inspect and diagnose the issue.

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6. Error Code 606: Communication Error

Inverters often rely on communication with monitoring systems to function correctly. A communication error, such as error code 606, can disrupt the inverter’s performance. Here’s what you can do:


  • Check the communication cables and connections to ensure they are secure and undamaged.
  • Restart your inverter and monitoring system.
  • If the error persists, consult the manufacturer’s instructions for troubleshooting or contact their customer support.


7. Error Code 707: Inverter Overload

An inverter overload error typically occurs when the connected load exceeds the inverter’s capacity. It can cause the inverter to shut down or, in some cases, damage the inverter or connected appliances. To address this error:


  • Identify the appliances or loads that are overloading the inverter and reduce the load.
  • Consider redistributing your appliances to different circuits to avoid overloading a single inverter.
  • If the issue continues, consult a professional technician to assess whether your inverter’s capacity needs an upgrade.

Preventing Inverter Errors

Preventing Inverter Errors

Now that you’ve learned how to resolve common inverter error codes, it’s essential to know how to prevent these issues in the first place. Here are some proactive measures to ensure your inverter operates smoothly:

1. Regular Maintenance

Regular maintenance is key to preventing inverter errors. Schedule periodic inspections to check for loose connections, dust or debris buildup, and signs of wear and tear. Keep the inverter and its surroundings clean and well-ventilated. If you’re unsure about maintenance procedures, consult the manufacturer’s guidelines or hire a professional technician.

2. Proper Installation

Inverter errors can sometimes be attributed to incorrect installation. Make sure your inverter is installed by a certified and experienced technician. They will ensure the inverter is positioned correctly, connected properly, and configured to operate within the specified parameters.

3. Quality Products

Investing in a high-quality inverter from a reputable manufacturer can significantly reduce the likelihood of errors. Quality inverters are often equipped with advanced features and are less prone to malfunctions. Consider reading product reviews and seeking recommendations from experts when choosing an inverter.


The Importance of Error Codes

Inverters, especially those used in solar power systems, are equipped with sophisticated control systems that monitor various parameters to ensure the smooth operation of your power supply. When an issue arises, the inverter communicates the problem using error codes. These codes serve as a diagnostic tool for both users and technicians, helping to pinpoint the source of the problem quickly.

Understanding these error codes can save you time and money. It can also prevent unnecessary service calls when the issue is minor and can be resolved with some basic troubleshooting. Moreover, knowing what the error code means empowers you to make informed decisions about when to call a professional.


Inverters play a vital role in our daily lives, and understanding inverter error codes is crucial for maintaining a consistent and reliable power supply. By familiarizing yourself with common error codes and their solutions, you can troubleshoot and resolve issues swiftly, saving time and money. Additionally, taking preventive measures, such as regular maintenance, proper installation, and investing in quality products, will help ensure that your inverter operates seamlessly.

In the dynamic world of electrical devices, staying informed about Growatt inverter error codes and their solutions empowers you to take control of your power supply. Remember that safety should always be a top priority, and if you encounter an issue you cannot resolve, don’t hesitate to seek professional assistance. With this comprehensive guide, you’re now well-equipped to navigate the world of inverter errors and keep your power supply running smoothly.

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