Are Solar Inverter Repairs Possible? | Everything You Need to Know

Your solar inverter is the heart of your solar system. That’s why understanding solar inverter problems and solar inverter repairs is crucial for system owners. A solar inverter converts the DC electricity produced by your solar panels into usable AC power for your home or business. But what happens when your inverter isn’t working properly? Your entire system can underperform or stop producing power.

Some common signs of solar inverter problems are your system suddenly producing little or no power, error messages on the inverter display, flashing warning lights, etc. A common question from most of the solar system owners is, can my solar inverters be repaired? Or do I need to replace it entirely? The answer depends on the type of inverter, the nature of the problem, and cost considerations. In this in-depth guide, we’ll explore everything you need to know about solar inverter repairs, including common faults, repair vs. replacement decisions, maintenance tips, and when to call in the professionals.

What Is a Solar Inverter and Why Does It Matter?

A solar inverter changes the DC power your panels make into AC power you can use at home or send to the grid. If it stops working, your solar system won’t work properly, and you might lose money or energy credits. Inverters come in different types—string, micro,hybrid, and each has its own repair needs. Fixing a broken inverter instead of replacing it depends on the type of inverter, the problem, and whether parts and experts are available.

Are Solar Inverter Repairs Possible in Australia?

Yes, solar inverter repairs are possible. Like fixing a broken appliance, experts can often repair them. If it’s too old or severely damaged, replacement might be necessary. You can contact your supplier or solar installer, as they usually handle the repairs of your solar products.

Key Takeaways About Solar Inverter Repairs

• If the solar inverter fails, your solar system will stop working until it’s replaced or repaired. Normally, a solar inverter lasts 10 to 15 years.
• If you want to replace an inverter, at first, you need to match specifications like power output, input voltage, and current ratings to ensure it follows Australian standards.
• If you install a new inverter by a qualifying installer, it can boost your system’s efficiency and save money.
• Your solar inverter will last longer if you check and maintain it regularly.
• The common reasons for inverter failure are things like weather, electrical problems, or defects from the factory.

Common Solar Inverter Problems

Common solar inverter problems can arise at any time due to various factors, and addressing them properly is crucial to maintaining the efficiency of your solar energy system. Here are some of the most common solar inverters problems:

1. Overheating: Solar inverters can overheat, especially in hot climates or if they’re in front of direct sunlight. This can reduce efficiency and, in severe cases, component damage.
2. Faulty DC Connections: Loose or damaged DC (direct current) connections between the solar panels and the inverter can disrupt the flow of electricity, which causes performance issues.
3. Grid Voltage Variations: Fluctuations in the electrical grid’s voltage can harm the inverter. If grid voltage is unstable, it can lead to frequent inverter shutdowns or reduced efficiency.
4. Internal Component Failure: Over time, internal components like capacitors, diodes, and transistors may fail, which affects the inverter’s functionality.
5. Dust and Debris: Dust in cooling vents or on the inverter itself can block airflow, causing heat retention and potential overheating. Regular cleaning can help maintain performance.
6. Humidity and Moisture: High humidity levels can potentially cause moisture to seep into the inverter, leading to corrosion or short circuits.
7. Software or Firmware Issues: Like any smart device, solar inverters may experience software bugs or firmware glitches, leading to communication failures or inaccurate data reporting.
8. Age and Obsolescence: Most inverters have a lifespan of 10–15 years. As they age, performance declines and breakdowns become more common. Older models may also lack compatibility with modern systems.
9. Wiring and Cable Problems: Damaged or improperly installed wiring can restrict the inverter’s ability to efficiently convert and transfer power, potentially triggering faults or reducing output.
10. Lightning Strikes and Power Surges: Lightning or sudden voltage spikes in the power grid can fry sensitive components within the inverter, requiring repair or replacement.

If you suspect a problem with your solar inverter, consult with a solar professional or technician for a thorough diagnosis and appropriate repairs. Regular maintenance and periodic checks can help prevent many of these common issues and extend the lifespan of your solar inverter.

How to Check if Your Solar Inverter Is the Problem

It can be hard to determine if your inverter is the problem without an electrician completing a full system check. If it is your inverter, this is often caused by a fault like ‘isolation fault’ or ‘no grid,’ which can also be related to other issues and cause your inverter to be non-operational.

If you think your solar inverter might be the reason your system isn’t working well, here are some simple steps to check:

1. Monitoring Power Output: If you notice a significant drop in your solar system’s power output, it could indicate an inverter problem. Compare your current energy production to your system’s historical performance.
2. Check the Inverter Display: Most modern inverters have digital displays that show their operating status. Check for error messages or unusual readings on the display.
3. Listening for Unusual Sounds: Inverters should operate quietly. If you hear buzzing, humming, or other unusual noises coming from the inverter, it may indicate a problem.
4. Do a Visual Check: Physically inspect the inverter for signs of damage, loose connections, or overheating. Look at the inverter for damage, burn marks, or loose wires.
5. Use Monitoring Tools: If you have an app or monitor, check real-time performance. Sudden drops or irregular patterns in energy production can signal an inverter problem.
6. Compare Inverters: If you have more than one inverter, see if one is acting differently from the others.
7. Call an Expert: When in doubt or if you suspect an inverter issue but can’t pinpoint the problem, it’s advisable to consult a solar professional or technician. They have the expertise and diagnostic tools to assess the entire system and determine if the inverter is the issue.

If you are unsure, give your local solar electrician a call, as there may be other underlying issues with your solar system. These may be causing an intermittent fault on the inverter, so it may be hard to confirm it is the inverter without the system being checked by a qualified solar electrician.

Need consultation to find yours?

What Is The Lifespan Of A Solar Inverter in Australian Conditions?

A solar inverter usually lasts about 10 to 15 years, but that depends on its quality, how it’s used, and how well it’s maintained. Regular maintenance and monitoring can help maximise its longevity.

String inverters often last 8–12 years, while microinverters and hybrid inverters may reach up to 15 years with proper maintenance. As the inverter gets older, it might work less efficiently and be more likely to fail. Keeping an eye on its age and performance helps you decide when it’s time to replace it.

Why Do Solar Inverters Fail?

Solar inverters fail due to several reasons. Here are a few of the most common reasons why your inverter fails and why your solar inverters need to be repaired.

• Solar Inverter Overheating: Extreme heat can cause solar inverters to overheat, leading to performance degradation and, potentially, failure. In hot climates or during scorching summer months, the inverter may work harder, accelerating wear and tear. Adequate ventilation and proper installation can help mitigate this issue.
• Faulty Installation of Your Solar Inverter: Inadequate or faulty installation can be a significant culprit in inverter failures. If the wiring, connections, or mounting of the inverter are not done correctly, it can lead to problems. Poorly installed inverters may be more susceptible to overheating or electrical issues.
• Solar Inverter Humidity: Humidity, particularly in regions with high moisture levels, can pose a threat to the sensitive electronics within the inverter. Moisture can infiltrate the internal components, causing corrosion and short circuits. Proper weatherproofing and housing can help safeguard the inverter.
• Poor Solar Inverter Maintenance: Like any machine, solar inverters require regular maintenance to function optimally. Neglecting maintenance, such as not cleaning dust and debris from the inverter or ignoring routine checks, can result in reduced efficiency and eventual failure.

Factors of Solar Inverter Repairs

Although solar inverter repairs are possible, the feasibility depends on several factors:

1. Age of the Inverter

Depending on the type and brand, most solar inverters have a lifespan of 10 to 15 years. If your inverter is new (under 5 years), repairs will be cost-effective and the best decision. But Older inverters, especially those that are at the end of their lifespan, may not be worth repairing due to their cost and potential.

2. Type of Inverter

• String Inverters: Repairs also depend on the type of inverter you use. String inverter repair is generally easier and cheaper because of their simple design and availability of replacement parts.
• Microinverters: Microinverters are a little complex inverter from other types of inverters available. So, the repairs are challenging, so replacement will be the best decision.
• Hybrid Inverters: Hybrid inverters combine solar and battery storage functions, making repairs more complex. You must need a specialised expert to repair.

3. Nature of the Fault

Minor issues like loose connections, software glitches, or replaceable components (e.g., capacitors or fans) are typically repairable. Major failures, such as a damaged main circuit board or severe internal damage, may make repairs more costly compared to replacement.

4. Warranty Status

Many inverters come with warranties ranging from 5 to 12 years. If your inverter is under warranty, the manufacturer may cover solar inverter repairs or provide a replacement at no cost. Always check your warranty terms before proceeding with repairs.

5. Availability of Parts

 Finding replacement parts can be difficult if the inverter models are older or less common. Reputable brands like SMA, Fronius, and Enphase typically have better support for spare parts, making repairs more accessible.

6. Technician Expertise

Successful solar inverter repairs require skilled technicians familiar with the specific brand and model. Choosing a certified professional ensures the repair is done correctly and safely.

Enphase microinverters come with one of the industry’s most generous warranties, lasting 25 years. This long-term coverage is ideal for homeowners who want to ensure their system’s reliability over decades. If a single panel isn’t producing due to a microinverter failure, Enphase’s warranty may cover the repair or replacement. However, labor costs for a professional solar inverter technician is often not included.

SMA string inverters include a standard 5-year warranty, which homeowners can extend up to 20 years. This warranty covers defects and solar inverter repair costs, but it doesn’t usually cover the labor costs for solar inverter repairs. If you encounter grid compatibility issues or persistent errors, an active warranty can help minimize repair expenses.
Additionally, SMA offers remote monitoring tools that can assist in early fault detection, reducing downtime and service disruptions. It’s important to register your inverter promptly after installation to ensure full warranty activation and support eligibility.

Fronius Inverter Warranties

The Solar Inverter Repair Process in Australia

If you suspect an issue with your inverter, here’s what the repair process typically involves:

1. Diagnosis: A qualified technician will start by diagnosing the problem. This may involve:

• Checking error codes on the inverter’s display.
• Inspect the inverter for physical damage or overheating signs.
• Testing electrical connections and components.
• Reviewing monitoring data to identify performance issues.

Some manufacturers provide diagnostic tools or apps that technicians can use to pinpoint the issue quickly.

2. Repair or Component Replacement: Once the problem is identified, the technician may:

• Replace faulty components like capacitors, fans, or relays.
• Update or reinstall firmware to resolve software issues.
• Repair or replace damaged wiring or connections.
• Clean the inverter to remove dust or debris causing overheating.

3. Testing: After repairs, the technician will test the inverter to ensure it’s functioning correctly. This includes verifying power output, grid synchronization, and communication with monitoring systems.

4. Follow-Up: Reputable repair services offer a warranty on their work, typically 6 months to a year. They may also recommend maintenance tips to prevent future issues.We(Aussie Solar Tech) also offer a warranty on repair services.

How to Choose a Reliable Repair Service in Australia

Finding the right repair technician is crucial for both safety and quality. Tips for choosing:

•  Licensing and Certification:
  Make sure your technician is a licensed electrician and accredited for solar inverter repairs.
•  Brand Experience:
  Choose a technician familiar with your inverter brand.
•  Transparent Pricing:
  Ask for an upfront quote that includes parts, labor, and any potential extra costs.
•  Warranty on Repairs:
  Look for service providers who offer warranties on their repair work.
•  Customer Reviews:
  Check online reviews and ask for references to gauge quality and reliability.

👉 Need a trusted technician?
Aussie Solar Tech ticks all the boxes — fully licensed, highly experienced with major inverter brands, transparent pricing, and backed by strong customer reviews. For reliable and certified repair services, they’re a top choice.

Solar Inverter Repair and Replacement Costs

Navigating the costs associated with solar inverter servicing can seem daunting, but understanding them is key to making informed decisions. Repair costs vary depending on the complexity of the issue—minor fixes like replacing an external plug or switch may cost as little as $80, while more involved repairs such as reconditioning internal electronics can range from $195 to $450. Additional charges may apply for the removal and reinstallation of the inverter.

However, if your inverter is old, parts are unavailable, or the repair costs approach the price of a new unit, replacement may be more economical. Replacing an inverter can cost anywhere from $1,000 to over $2,500, depending on the size, brand, and type—hybrid or 3-phase inverters tend to be on the higher end. It’s essential to check your warranty coverage, as many inverters come with 5 to 12-year warranties that can significantly reduce or eliminate repair or replacement costs. Ultimately, regular solar system maintenance is crucial in preventing costly issues and prolonging your inverter’s lifespan.

When Should You Replace Your Inverter?

Most solar inverters are built to last around 10 to 12 years, but their lifespan isn’t guaranteed. Factors like harsh weather, subpar installation, or lack of maintenance can significantly reduce their longevity.

Even with proper care, inverter failure can still occur. Here are some common warning signs that it might be time for a replacement:

• Reduced energy output despite good sunlight
• Persistent error messages or warning lights
• Frequent shutdowns or complete system failure

If you’re seeing any of these symptoms, it’s wise to consider a new inverter.

Choosing the Right Solar Inverter Replacement

Not all inverters are created equal. Some are more durable, efficient, or compatible with battery storage and smart energy systems. When selecting a replacement:

• Check compatibility with your existing panels and system
• Match technical specs like voltage and power output
• Consider features like remote monitoring or hybrid capabilities

• Consult a solar professional for the right solar inverter replacement.

Tip: You can choose a hybrid inverter as your solar inverter replacement.

Can you Recycle Old Inverters?

When it’s time to replace your old solar inverter, don’t forget that recycling is an eco-friendly option. If you’ve been experiencing solar inverter faults, it might be time to consider replacement and recycling. Solar inverters, like other electronic devices, contain valuable materials that can be recovered and reused.

First, check with your local waste facilities. Some may offer a special collection for e-waste. There are also specialised recycling services that deal with solar equipment. These services know exactly how to handle, dismantle, and recycle old inverters safely and responsibly.

If repair services have declared your inverter beyond repair, don’t just throw it away. By recycling old inverters, you’re not only reducing waste but also contributing to the circular economy. This approach keeps resources in use for as long as possible, extracts the maximum value from them whilst in use, and then recovers and regenerates products and materials at the end of each service life.

DIY Solar Inverter Repairs: A Good Idea?

While some homeowners may be tempted to attempt solar inverter repairs themselves, this is generally not recommended. Inverters are complex electrical devices, and improper handling can lead to:

• Electrical hazards, including shocks or fires.
• Voiding the manufacturer’s warranty.
• Further damage to the inverter or solar system.
• Non-compliance with local electrical codes.

Always hire a certified technician with experience in solar inverter repairs to ensure safety and reliability.

Shah Tarek, Solar Energy Consultant

Shah Tarek is a Solar Energy Consultant with 10 years experience in solar system design and solar consultancy field at Australia. He is now a Director, Operation & Consultancy Division at Aussie Solar Tech, a leading Australian solar retailer and installer. Here he is writing informative and engaging solar content that educates the community on the benefits of solar power. His work supports Aussie Solar Tech’s mission to promote sustainable energy solutions and foster a greener future for Australia.