Inverter problems

We see this issue many times and quite often the Solar PV Inverter will have failed.

If the inverter malfunctions, it can’t convert the DC direct current to an AC alternating current. So, it provides your home with direct current only, which is not usable. To resolve this problem, you will need to speak with Mr Solar to check the DC and AC side of the inverter.

We can normally Diagnose issues on the phone with some simple checks for you.

Malfunctioning Solar FITS feed-in tariff Meter

A rare issue can cause the units not to accrue

Even when your panels perform their function, the solar meter might not read the energy production correctly. Is your solar meter is not working correctly? You won’t have the right readings to calculate FITS feed-in tariff payments or know your energy savings, loses could be severe if you have a system registered before 2019.

Atmospheric Dirt and dust build-up

The solar panel stay outside, where it is exposed to all kinds of dirt and dust. Exposure causes the build-up of dirt on the surface of the panel. The accumulated dirt blocks the surface of the panel from receiving sunlight. Cleaning the Solar panels is recommended if dirt has built up to the levels where the performance has been significantly changed.

Poor workmanship                                       

Is there a mistake or misconnection during the system’s installation, which causes the solar system to malfunction. That’s why as soon as you install the system, your installer should walk you through the workings of your solar. You should see that it’s working before they leave.

Whatever the issue Mr Solar can help diagnose and resolve the issue quickly. Our testing and inspection services are some of the best in the industry with both qualified electricians and Thermal drone surveys.

Thermal Drone Surveys

Thermal drone surveys provide a fast, non-invasive way to identify faults within solar PV systems that may not be visible from the ground. Using high-resolution thermal imaging, we can detect overheating panels, defective cells, failed bypass diodes, loose connections, and other issues that cause reduced performance or safety risks. This method allows large or difficult-to-access installations to be inspected safely and accurately without disruption. Thermal drone surveys are particularly effective for diagnosing inverter-related performance issues and underperforming strings, helping to target repairs quickly and minimise downtime.

Don’t delay and call us today or complete the contact form below.

 

 

Inverter Problems – FAQs

How do I know if my inverter is faulty?

Common signs include no generation, reduced output, error messages or fault codes, warning lights, or repeated tripping of fuses or breakers.

What should I do if my inverter shows a fault code?

Make a note of the code and any warning lights displayed. If the fault does not clear on its own, contact a qualified solar engineer to carry out testing and diagnosis.

Can an inverter fault stop my system working completely?

Yes. The inverter converts DC electricity from the panels into usable AC power. If it fails, your system may partially or completely stop generating.

Is it safe to keep using a faulty inverter?

Not always. Some inverter faults can pose electrical or fire risks. If you believe there is a serious issue, switch the system off if safe to do so and seek professional advice.

How long do solar inverters last?

Most inverters last between 7–12 years, depending on usage, environment, ventilation, and manufacturer quality.

Can you repair or replace inverters you didn’t install?

Yes. Mr Solar tests, repairs, and replaces inverters regardless of the original installer.

Is my inverter covered by warranty?

Many inverters come with warranties of 5–10 years, with extended warranties sometimes available. We can help identify your inverter model and advise on possible warranty claims.

Should I repair or replace my inverter?

This depends on the age of the inverter, the nature of the fault, and parts availability. After testing, we’ll clearly explain the most cost-effective and reliable option.

Compliance & Safety

All inverter testing, inspection, and repair work is carried out in line with current UK regulations and industry standards, including:

• BS 7671 (IET Wiring Regulations)

• Manufacturer installation and safety guidance

• Relevant MCS standards where applicable

Customers should never attempt to repair or interfere with inverters themselves due to the risk of electric shock and fire.

Expert Inverter Testing & Repair

If you’re experiencing inverter problems, Mr Solar can diagnose and resolve the issue quickly and safely.

📞 Call 01603 394104 or 01493 289118

We cover Norfolk and Suffolk, providing fast, professional testing and inspection services backed by over 15 years’ experience.

Contact Us

Use the form below and a member of our team will be in touch.