Sungrow is a popular solar brand in Australia. Many people choose it because it’s affordable, widely available, and comes from a trusted company. So, it can be unexpected when something goes wrong.
At PSC Energy, we have installed and serviced hundreds of solar systems in Western Sydney, including many Sungrow units. We understand what usually goes wrong, what can be fixed, and what might need extra attention.
In this article, we’ll explain the following:
- Is a Sungrow Solar System Reliable?
- Common Problems with Sungrow Solar Inverters
- Sungrow App and Monitoring Problems
- What to Do If Your Sungrow Solar System Has a Fault
- Sungrow Warranty Claims: What’s Covered and How to Make One
- FAQ: Sungrow Problems
By the end of this article, you’ll know the most common Sungrow problems, their causes, and what you can do if your system is not working properly.
Is a Sungrow Solar System Reliable?
Before we talk about the problems, it’s good to know that Sungrow is the world’s largest inverter manufacturer by volume. Their equipment is used in homes, businesses, and large solar farms worldwide.
Most homeowners find that their Sungrow system works well for many years. When issues do come up, they usually fall into a few common categories, which we’ll explain below. The brand is reliable, but like any technology, it has some weak spots. Knowing about these can help you solve problems more quickly.
Common Problems with Sungrow Solar Inverters
The inverter is like the brain of your solar system. It turns the DC electricity from your panels into the AC power your home uses. If the inverter fails, your whole system will stop working.
Here are the most common Sungrow inverter problems:
- Fault codes and error messages: Sungrow inverters display codes on the screen when something is wrong. Common codes include grid voltage faults (when the inverter detects voltage outside the normal range), isolation faults (often caused by moisture or damaged wiring), and communication faults (when the inverter loses contact with the monitoring system or battery). Some of these problems are temporary and fix themselves, but others could mean there is a real hardware or wiring issue.
- Inverter goes offline after a firmware update: This is a common problem in Australia. Sungrow sends firmware updates remotely using the iSolarCloud platform. Most of the time, the update runs in the background and the system restarts without issues. Sometimes, the update fails or a bug in the new firmware causes the inverter to go offline or show a fault. If your system stopped working after an update, this might be why.
- Overheating and thermal shutdowns: Sungrow inverters are designed to work within certain temperature limits. During hot Australian summers, especially in roof spaces or places with poor airflow, inverters can get too hot and shut down to protect themselves. They usually start working again once they cool down. If this happens often, it’s a good idea to check where the inverter is installed or improve ventilation.
- Grid disconnection faults: Australian standards require inverters to disconnect if the grid voltage or frequency goes outside set limits for safety. Some Sungrow inverters are more sensitive and may disconnect more often than necessary. If your inverter keeps dropping out and reconnecting, a licensed electrician should check its voltage and frequency settings.
If you want to learn a bit more about how your solar system will work in a blackout, you might want to check out the following article titled, Will Your Solar Panels Work During a Blackout?
Sungrow App and Monitoring Problems
Most Sungrow owners use the iSolarCloud app to monitor their system. The app shows live data, battery status, and past performance. However, it is also a common source of complaints.
- If the app shows no data or says “device offline,” it usually means the inverter lost its internet connection, not that the system stopped working. Check if the Wi-Fi dongle is connected and make sure your home router settings or password haven’t changed. Some Sungrow dongles don’t work well with 5 GHz Wi-Fi and need a 2.4 GHz network.
- If you notice gaps or odd numbers in your app’s data, it is usually a logging problem,not an issue with power generation. The inverter may still be working properly even if the monitoring is not.
- If you are having trouble logging in or seeing your system in the app, it could be because Sungrow updated the iSolarCloud platform. Some users need to re-register or move their accounts. If you are locked out, check if you need to sign up again on the new platform.
Some homeowners use third-party energy monitoring systems. Because Sungrow uses its own communication protocol, connecting to other devices is not always easy. You may need a compatible meter or extra hardware to connect your Sungrow system to an external monitoring platform.
If you’re interested in learning a bit more about how weather affects solar panels, you might want to check out the following article titled, How Does The Weather Affect Your Solar Panels?
What to Do If Your Sungrow Solar System Has a Fault
If your system is showing a fault code or acting strangely, try these steps before calling for help:
- Write down the fault code if your inverter shows one. You can find a list of codes in the inverter manual or on Sungrow’s support website. The code will help you understand what problem you are dealing with.
- Restart the inverter by turning it off with the DC isolator, which is usually a switch on the side. Wait 30 seconds, then turn it back on. This often clears temporary faults.
- Check the basics: Make sure your Wi-Fi is working, the inverter has power, and no circuit breakers or isolators have tripped in your switchboard.
- Log in to iSolarCloud if possible. Check the fault history and any alerts in the app or web portal. This often gives you more details than the inverter screen.
- If the problem continues, contact your installer. They are responsible for supporting their work. If it’s a hardware issue, they can handle the warranty claim with Sungrow for you.
- If your installer doesn’t respond, you can contact Sungrow’s Australian support team directly. Have your inverter serial number, the fault code, your system details, and when the problem started ready when you call.
If you’re interested in learning a bit more about solar panel efficiencies, you might want to check out the following article titled, How Efficient Are Solar Panels? Shade, Heat, and Seasonal Considerations in NSW, Australia.
Sungrow Warranty Claims: What’s Covered and How to Make One
Knowing your warranty details before any problems occur can save you stress. Here is what you should know:
- Inverter warranty. Sungrow’s residential inverters typically come with a 10-year warranty. This covers manufacturing defects and component failures under normal operating conditions.
- Battery warranty. Sungrow’s residential batteries carry a 10-year warranty with a capacity retention clause, which means the battery must retain a minimum percentage of its original capacity (usually 70%) over the warranty period.
- What can void the warranty? Using the system outside its specified limits, physical damage, installation by an uncertified installer, or making unauthorised changes can all void the warranty. This is why it is important to choose a Clean Energy Council-accredited installer.
- How to make a claim: Start by contacting your installer, especially if the issue is with their work. For product defects, your installer can submit a warranty claim to Sungrow. If you need to contact Sungrow directly, have your inverter or battery serial number, proof of purchase, and a description of the problem ready.
It is also important to know your rights under Australian Consumer Law. If your product does not work as promised and is still within a reasonable lifespan, you may have extra rights beyond the manufacturer’s warranty. The ACCC website explains this clearly.
If you’re interested in learning a bit more about solar panel maintenance, you might want to check out the following article titled, How to Clean Solar Panels.
Wrapping Up: Power Through the Problem
Sungrow is a widely used and generally capable solar brand, but like any technology, its systems can develop problems. The most common issues are inverter fault codes, firmware-related dropouts, battery charging faults, and connectivity issues with the monitoring app.
Most of these have clear causes and practical solutions. Knowing the steps to follow when something goes wrong means you spend less time in the dark and more time generating power.
If your Sungrow system is not working and your installer is not helping, PSC Energy can assist you. We have worked on hundreds of solar systems in Western Sydney, including many Sungrow units, and can quickly find and fix faults. It’s what we do.
If you’re interested in learning a bit more about solar panel problems and solutions, you might want to check out the following article titled, 4 Common Solar Panel Problems (and How to Avoid Them).
FAQ: Sungrow Problems
What are the most common problems with Sungrow solar systems?
The most reported problems are fault codes and error messages on the inverter, the system going offline after a firmware update, battery charging and discharging issues, and the iSolarCloud app losing connection. Most of these have known causes and can be resolved without replacing hardware.
Why did my Sungrow inverter stop working after a firmware update?
Sungrow pushes firmware updates remotely. Occasionally, an update fails to complete correctly, or a new firmware version introduces a bug. If your system went offline after an update, restart the inverter first. If it stays offline, contact your installer or Sungrow support with your inverter serial number.
Can I fix a Sungrow fault code myself?
Some fault codes resolve after a simple restart. Others require a licensed electrician or solar technician to investigate. Never open the inverter enclosure yourself. If the fault code persists after a restart, look up the code in your manual and contact your installer.
Is my Sungrow system covered under warranty if my installer goes out of business?
Yes. The product warranty sits with Sungrow, not the installer. You can contact Sungrow Australia directly to lodge a warranty claim if your installer is no longer operating. Keep a record of your installation date, serial numbers, and any correspondence related to the fault.
Should I replace my Sungrow system if it keeps having problems?
Not necessarily. Repeated problems with the same component may indicate a manufacturing defect, which could be covered under warranty. If your system is older and out of warranty, and faults are becoming frequent, it may be worth getting a professional assessment to weigh the cost of repairs against the cost of upgrading.
