Common Solar Inverter Issues, Causes, Repairs and Preventative Measures

Solar power systems have become an integral part of the sustainable energy landscape, with solar inverters playing a pivotal role in converting sunlight into usable electricity. However, like any technology, solar inverters can encounter issues that may impact their performance. In this blog, we’ll delve into common problems, their causes, and repairs.

Understanding Solar Inverters

Before delving into the intricacies of issues and repairs, let’s take a look at the basics. A solar inverter is a crucial component of a photovoltaic (PV) system, responsible for converting direct current (DC) generated by solar panels into alternating current (AC), which is used to power homes and businesses.

To learn more about this important solar component you can read our other solar inverter blog which covers their role more in-depth.

Common Solar Inverter Issues

While inverters are designed for durability, like any other technological device or machine, solar inverters are not immune from issues. Over their lifetime they can encounter various potential issues which can lead to malfunctions. These include:


Overheating can result from prolonged exposure to high temperatures or inadequate ventilation. To cool down your inverter system and prevent it from overheating again you need to improve the ventilation. This can include relocating the solar inverter to a shaded or undercover area such as inside a shed to minimise sunlight heating up the system. You can also install cooling systems to further ensure against overheating.

It’s also important to have regular maintenance and assessments completed to check if there is another underlying issue causing the overheating.

Inverter Failure

Internal component failure can occur due to manufacturing defects, wear and tear, or electrical issues. These failures can be rectified by having a certified solar electrician repair or replace any faulty or damaged components or the entire inverter, depending on the severity of the issue. Your solar electrician will be able to diagnose the issue and let you know what repairs or replacements are necessary upon inspection.

Reduced Efficiency

Reduced efficiency can be caused by a simple accumulation of dirt, dust, or debris on the inverter or solar panels. To keep your solar panels producing electricity as efficiently as possible it is essential to keep them clean. Cleaning and maintaining your panels, while essential, can be dangerous without the right tools and safety equipment.

Scheduling regular professional solar cleaning and maintenance can help ensure optimal performance.

Grid Connection Issues

Solar inverters can sometimes experience problems with connecting to the grid or grid voltage fluctuations. Professional assistance may be required to troubleshoot grid connection issues and ensure a stable connection. Solar electricians have the skills and know-how to address issues with wiring, connectors, or the grid connection point safely and efficiently.

Communication Errors

Issues can arise with the communication between the solar inverter and monitoring systems.

These issues can generally be resolved by updating firmware, checking cable connections, and ensuring a strong network connection. However, if this does not resolve the communication then you may need to have the communication module replaced by an electrician.

Solar Inverter Repairs

The repairability of a solar inverter depends on the nature and severity of the issue. In many cases, common problems can be successfully addressed through repairs, saving both time and money compared to a full replacement.

Here’s a closer look:

Repairable Issues:

  • Faulty Components: Repairing or replacing individual faulty components such as capacitors, diodes, or resistors is a fairly common job that solar electricians perform.
  • Faulty Wiring: Repairs to faulty wiring or loose connections are common and relatively straightforward to rectify.
  • Software Issues: Many issues stem from software errors, which can often be resolved through firmware updates or reprogramming.

Non-Repairable Issues:

  • Severe Damage: Severe damage caused by factors like lightning strikes, hail or floods may render the inverter irreparable.
  • Outdated Technology: As inverters age, the likelihood of internal component failure increases, making it more cost-effective to replace an outdated inverter with a newer, more efficient model.

Importance & Benefits of Professional Assessment

While some issues can be addressed through DIY solutions, it’s crucial to involve solar professionals for a comprehensive assessment. Certified solar technicians can accurately diagnose problems and recommend the most cost-effective solutions.

Here are a few of the other benefits of professional maintenance and repairs:

  • Cost-Effective: Professional repairs are often more budget-friendly than a full replacement, especially for minor issues, and a professional can tell you what is necessary. At Solar Uptime, we always prioritise repairs over replacement.
  • Sustainability: Repairing extends the lifespan of the inverter, promoting sustainability by reducing electronic waste.
  • Quick Turnaround: Repairs typically have a quicker turnaround time than procuring and installing a new inverter.

Preventing Solar Inverter Issues

While repairs are a viable solution, proactive measures can prevent many inverter issues. Some effective prevention measures include:

  • Regular Maintenance: Keep the inverter and solar panels clean to prevent dust and debris buildup. Schedule routine inspections and cleaning to ensure optimal performance.
  • Temperature Control: Ensure proper ventilation and install cooling systems if needed to prevent overheating.
  • Professional Installation: Ensure the inverter is installed by certified professionals to minimise potential issues.
  • Quality Products: Invest in high-quality inverters from reputable manufacturers to reduce the likelihood of failures.

Keep Your Solar Inverter Working Effectively With Professional Repairs

In summary, the repairability of solar inverters depends on the specific issue and its severity. Regular maintenance, timely repairs, and investing in quality products are key to maximising the lifespan and efficiency of your solar power system. By understanding common issues and taking preventive measures, you can make informed decisions to keep your solar power system running efficiently.

If you encounter issues, consult with solar professionals to determine the best course of action for your specific situation.