Your solar power system relies on a solar inverter to turn sunlight into usable electricity for your home. It’s the heart of your setup, ensuring all that sunshine powers your lights, appliances, and gadgets efficiently. But when your solar power inverter isn’t working properly, it can throw a wrench in your system’s performance—and your energy bill savings.
Common solar inverter repair issues, like error codes, reduced energy output, or sudden shutdowns, can leave you scratching your head. The good news? Many of these minor solar inverter repairs are easy to complete on your own. For bigger challenges, though, you need an expert solar technician to complete your solar inverter repair. That’s where GreenLancer comes in. Since 2013, we’ve been solar energy experts advancing renewable energy adoption across the United States.
Common Solar Inverter Repair Issues & What To Do
When your solar panel system isn’t performing as expected, inverter errors are often the main cause, leading to disruptions in renewable energy production.
Visible Error Codes on Inverter Display
Solar inverters, like those from SolarEdge, SMA, or Fronius, often display error codes or flashing indicator lights when something isn’t right. These codes can signal anything from a grid compatibility issue to internal component failure to needing a firmware update.
For example, a SolarEdge inverter may show a “Grid Voltage Fault,” indicating fluctuations in the utility grid. If you notice error codes, refer to the manual or app for guidance. Persistent errors often require professional solar inverter repair services.
Decreased Solar Power Output
Your system’s monitoring app, such as SolarEdge Monitoring, Enphase Enlighten, or Fronius Solar.web, might show a noticeable drop in energy production. This could mean the inverter struggles to convert DC electricity from the panels into AC power.
Sometimes, this is due to shading, dirty panels, or degraded inverter components. Compare current output to past performance or expected levels to spot the issue early.
Unusual Sounds or Odors From the Inverter
If your inverter emits a buzzing noise or smells like burnt plastic, it’s a clear warning sign. Brands like SMA or ABB inverters are designed to operate silently, so unusual sounds could indicate loose wiring, overheating, or internal damage. Similarly, electrical smells might signal melting components, which should never be ignored.
If this happens, shut down the system immediately and call a solar technician for a professional inverter repair.
Communication Problems
Modern solar inverters often communicate with your monitoring system via Wi-Fi or Bluetooth. If your SolarEdge or Enphase app stops receiving data, it could point to connectivity issues or even a hardware malfunction.
Try resetting your router, ensuring the inverter has the correct Wi-Fi password, and checking for inverter software updates. Check the current firmware version displayed on the inverter's interface and compare it to the latest version available on the manufacturer's website. If the inverter software version is older, you likely need an update. Persistent communication issues may require a solar technician’s help to diagnose or repair your solar system.
Inverter Overheating
Inverters from brands like Huawei or Fronius are equipped with cooling systems, such as heat sinks or fans, to prevent overheating. If the unit is exposed to direct sunlight or ventilation is blocked, your solar inverter may overheat, triggering safety shutdowns or lower efficiency.
You’ll often notice inverter error codes related to temperature or feel excessive heat near the unit, which might be more common in warm or hot weather. Ensure proper inverter placement and airflow to your solar inverter to prevent this issue. If the issue persists, it might be necessary to have a solar technician relocate your inverter to a shaded, well-ventilated location.
Ground Faults
Ground faults occur when electrical current unintentionally flows into the ground due to damaged wiring or faulty components. Inverters like SMA or SolarEdge are designed to detect these faults and may shut down to protect your solar system.
You might see error messages like “RCD Fault” or “Ground Fault Detected.” These are serious issues that require immediate attention from a trained solar professional.
Inverter Shutdowns
If your solar panel inverter frequently powers off, it could indicate problems like grid instability, internal component failure, or software glitches. For example, Fronius inverters might shut down to protect themselves when detecting fluctuating grid voltages.
You’ll notice your solar panel system stops producing power during these times, often accompanied by inverter error codes. Restarting the inverter might temporarily resolve the issue. Regularly update your inverter’s firmware, following the manufacturer’s guidelines. Most brands like SolarEdge, Enphase, SMA, and Fronius offer easy-to-follow instructions for updating inverter firmware. If the inverter shutdown issue continues, you’ll likely need professional inverter repair services.
Microinverter Failure
If your solar power system uses microinverters, such as those from Enphase, you might notice in the monitoring portal that one panel isn’t producing power while others are functioning normally. This often indicates a failure in the microinverter for that specific panel, preventing it from converting DC to AC power.
Since microinverters operate independently on each solar panel, the issue usually doesn’t impact the rest of the system. Look for error notifications in the solar monitoring app or compare the performance of each panel to identify the issue. Improper wiring or degradation can also contribute to microinverter failure. A professional solar inspection and inverter repair services are often necessary to resolve this issue.
Common Causes of Solar Inverter Problems
Let’s explore some of the most widespread inverter issues you may encounter and how to fix them.
Needing a Reboot
Inverters, like any other electronic device, occasionally require a reboot to resolve temporary glitches. Models from brands like Enphase or SolarEdge might exhibit error codes or communication failures that can be cleared with a simple system restart. Follow the manufacturer's instructions to safely reboot your inverter.
Internet Connectivity Issues
Solar monitoring systems for inverters, such as Enphase Enlighten or Fronius Solar.web, rely on a stable internet connection to report performance data. Wi-Fi or ethernet issues can prevent the inverter from syncing with the monitoring portal, making it harder to spot problems. Restart your router or check the inverter’s connection settings to resolve this.
If you've changed your internet Wi-Fi password and your solar inverter is no longer connecting, it means you need to update the Wi-Fi settings on the inverter with the new password.
Inverter Software or Firmware Updates
Inverter firmware plays a crucial role in maintaining optimal performance and compliance with utility grid requirements. Over time, manufacturers like SolarEdge, Enphase, SMA, or Fronius release updates to fix bugs, improve efficiency, and ensure compatibility with evolving power grid standards.
Not installing these inverter software updates can lead to inverter errors or even unexpected shutdowns. For example, older firmware might not respond correctly to grid signals, causing disruptions in home solar energy production.
To update your inverter, refer to the manufacturer’s manual or support site for specific instructions. Many modern inverters allow over-the-air updates via their monitoring apps, such as Enphase Enlighten or SolarEdge Monitoring. Keeping your inverter’s firmware up-to-date ensures smooth operation and reduces the likelihood of needing professional solar inverter repair.
Environmental Factors
Solar panel inverters are designed to endure various conditions, but extreme heat, dust, or moisture can take a toll. Prolonged exposure may cause components to overheat or corrode, reducing efficiency or triggering safety measures.
Placing your inverter in a shaded, well-ventilated area and performing regular cleaning can help mitigate these issues. In this scenario, professional solar inverter repair services are needed.
Aging or Faulty Components
Capacitors and other internal components of inverters, such as those in SolarEdge or SMA models, wear out over time. Aging inverters may show reduced efficiency, frequent error codes, or complete failure.
Regular maintenance and monitoring are essential to catch these signs early and plan for replacement if necessary. In many cases, the solar inverter warranty will cover the cost of the new equipment.
Solar Wiring Issues
Faulty or improperly connected wiring can disrupt the inverter’s functionality, especially in systems with Enphase microinverters or string inverters from brands like Fronius. These issues may result in power losses or ground faults.
Ensure your installer checks for wiring problems during routine inspections to avoid long-term damage. Unfortunately, solar wiring issues can void the inverter warranty, so it is best to correct this issue before it leads to inverter failure.
Electrical Connection Issues
Loose or damaged wiring is a frequent cause of inverter problems, particularly with brands like Enphase, SolarEdge, and SMA. Over time, connections may degrade due to wear, corrosion, or improper installation. This can lead to intermittent power losses, inverter error messages, or even safety shutdowns. Inspect cables periodically for visible damage or loose terminals and address issues promptly.
Grid Compatibility Issues
Inverters are highly sensitive to grid voltage and frequency changes. Brands like SMA or Fronius might shut down or display error codes when grid conditions fall outside acceptable ranges. This is a safety feature but can result in system downtime.
In some cases, inverter firmware updates can correct grid compatibility issues. If necessary, consult a professional to address grid-related issues.
DIY Solar Inverter Repair Tips
Although some solar inverter issues require professional repair services, there are a few simple steps you can take to troubleshoot and potentially fix minor inverter problems yourself:
Restart the Inverter
Many minor issues and inverter errors can be resolved by rebooting your inverter. To do this, shut off the inverter and disconnect it from the power source, following the manufacturer’s instructions.
Wait at least 5-10 minutes before turning the inverter back on. This allows the system to reset and can clear temporary glitches or inverter error codes. Brands like SolarEdge or SMA often recommend this step for initial troubleshooting.
Clean the Inverter
Dust, dirt, or debris around the inverter can affect the inverter’s cooling system or block ventilation, potentially causing overheating and triggering an inverter error. Use a soft cloth or a can of compressed air to clean the exterior of the inverter, ensuring the vents are unobstructed.
Never use water or harsh chemicals, as these can damage sensitive components. For outdoor inverters, ensure the area is free from excessive debris or plant growth.
Check the Internet Connection
For inverters that use monitoring systems, like Enphase or Fronius, ensure your internet connection is working properly. If the inverter isn’t communicating with the monitoring portal, try resetting your router and checking the Wi-Fi or Ethernet connection to the inverter.
In some cases, you may need to reconfigure the network settings through the inverter app or portal or update your Wi-fi password.
Check for Inverter Software Updates
Outdated software can lead to inverter errors or performance issues, including unexpected shutdowns. Inverter manufacturers regularly release firmware updates to improve inverter functionality, address bugs, and meet updated utility standards.
To check for updates, access your inverter’s monitoring portal or app, such as SolarEdge Monitoring or Enphase Enlighten. Many systems will notify you if an inverter software update is available.
Follow the manufacturer’s instructions to apply updates, which may require a stable internet connection. Keeping your inverter software current reduces the likelihood of system interruptions and ensures smooth integration with the grid.
Check for Loose Connections
Inspect the cables and plugs around your inverter to ensure they’re securely connected. Loose wiring can interrupt power flow or cause error messages to appear on the inverter display.
Tighten any loose connections carefully, but avoid tampering with internal components unless you’re trained. If your solar system includes microinverters like Enphase, check for individual panel connections as well if you can safely access your solar panels.
Review the Manual
Inverter error codes can be specific to the brand and model. Refer to your inverter’s manual or the manufacturer’s website for a list of error codes and their meanings. Brands like Fronius, SMA, or SolarEdge often provide detailed inverter troubleshooting steps for common errors.
Following these instructions can help you identify whether the issue is something you can fix or requires professional intervention.
When to Call a Professional for Solar Inverter Repair
While some solar inverter issues can be resolved with DIY troubleshooting, others require the expertise of a professional. Knowing when to call for help can save time, protect your system, and ensure your solar power continues to run efficiently.
Persistent Inverter Errors
If your inverter repeatedly shows error codes despite your troubleshooting efforts, it’s time to call the solar experts. Persistent errors could point to deeper issues like internal hardware failure or grid compatibility problems. For example, SMA or SolarEdge inverters may display “DC Isolation Fault” or “Grid Voltage Out of Range” errors that require specialized tools and knowledge to resolve.
Physical Damage
Visible cracks, scorch marks, or melted components on your inverter are signs of severe damage. These issues can result from electrical surges, overheating, or physical impact and pose serious safety risks.
Never attempt to repair a damaged inverter yourself. Trained solar professionals, like the GreenLancer team, can assess the extent of the solar system damage and determine whether inverter repair or replacement is the best option.
Inverter Replacement Services
If your solar panel inverter is outdated, severely damaged, or is no longer efficient, replacing it might be more cost-effective than repairing the inverter. Many inverters come with manufacturer warranties that may cover solar inverter replacements. A professional solar repair technician can confirm whether your inverter warranty applies and guide you through selecting and installing a new unit.
Contact GreenLancer
For reliable, expert help with solar inverter repair, replacement, or diagnostics, trust GreenLancer. With over a decade of experience in solar energy, we specialize in pinpointing issues and providing effective solutions for all major inverter brands. Whether it’s a minor repair or a full replacement, the GreenLancer team ensures your solar energy system is back to optimal performance in no time.
Understanding Solar Inverter Warranties
Solar inverter warranties provide peace of mind by covering many repairs or replacements for inverter problems.
What Solar Power Inverter Repairs Are Covered By Warranties?
Most solar inverter warranties cover the following:
Manufacturing defects
Replacement of faulty units
Costs associated with shipping and labor (for select brands)
Unfortunately, inverter warranties generally don’t cover damage caused by improper installation, extreme weather, or lack of maintenance, which may require out-of-pocket solar inverter repairs. However, your homeowners’ insurance often covers solar power invert repairs from extreme weather events, natural disasters, and vandalism. Also, the warranties don’t typically cover the labor for solar inverter repair or replacement.
Inverter warranties vary depending on the brand, model, and system configuration, so it’s essential to understand what’s included. This information is often included in the solar proposal from the solar installation company. Below, we highlight the warranty offerings from some of the most popular solar panel inverter brands.
SolarEdge offers a standard 12-year warranty for its string inverters, which can be extended to 20 or 25 years for an additional fee. This warranty typically covers manufacturing defects and inverter replacement costs. If you’re experiencing inverter errors or need a solar inverter repair, SolarEdge’s warranty can be a valuable safety net. It also provides an impressive 25-year warranty for power optimizers, ensuring long-term coverage for these essential components of your solar system.
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 microinverter repair or replacement are 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.
Fronius provides a standard 5-year warranty for its inverters, with an option to extend up to 20 years. The company’s warranty covers both solar power inverter repairs and replacements due to manufacturing defects or aging components. However, labor costs for inverter repair services are not typically included in the warranty.
Benefits of GreenLancer’s Solar Inverter Repair Service Network
The GreenLancer network has expert solar technicians in 40 states, and many have NABCP certification.
Technicians Experienced in Solar Inverter Repairs & Replacement
With over a decade of expertise in solar energy, GreenLancer supports homeowners nationwide with solar panel inverter repair services. Our team understands the complexities of all major inverter brands, including SolarEdge, Enphase, SMA, and Fronius, ensuring your system gets the expert care it needs.
Quick Inverter Diagnostics
Time is critical when your solar inverter isn’t functioning properly because you are missing out on solar energy production. GreenLancer offers fast and accurate diagnostics to identify issues like inverter shutdowns, microinverter failures, or grid compatibility problems. Our efficient approach minimizes downtime, helping you get back to generating clean energy as soon as possible.
Inverter Replacement Services
If your inverter requires replacement, GreenLancer simplifies the process. We guide you in selecting a compatible and reliable new inverter, ensuring it meets your energy needs. Expert solar repair technicians handle the replacement inverter installation seamlessly, so you can maximize your energy bill savings.
Expertise in Solar Inverter Repairs
GreenLancer is the trusted choice for homeowners, especially if your original installer is no longer in business or your labor warranty has expired. Our reliable repair services provide peace of mind and convenience, backed by a reputation for quality and exceptional customer service in the solar industry since 2013.
Resolving Solar Inverter Problems
Addressing solar inverter issues promptly is crucial to maintaining your solar system’s efficiency and ensuring a steady supply of clean energy for your home. Ignoring problems like persistent inverter error codes, decreased power output, or physical damage can lead to more significant issues and costly solar system repairs down the line.
For reliable and expert assistance, trust GreenLancer. With over 10 years of experience in solar energy, GreenLancer provides comprehensive solar inverter repair and replacement services tailored to your needs. Whether it’s quick diagnostics, professional inverter repairs, or seamless replacements, GreenLancer ensures your system operates at peak performance. Don’t wait—reach out today to restore your solar system to optimum solar energy output.
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