Solar photovoltaic (PV) systems have become an increasingly popular renewable energy solution, largely due to their efficiency, cost-effectiveness, and environmental sustainability. As with any piece of technology, though, occasional issues may arise, and the inverter – a crucial component of a PV system – is no exception. This blog post will explore how to troubleshoot common inverter issues in solar systems, drawing on the expert advice and support provided by, a leading supplier in South Africa.

Understanding the Role of an Inverter

Before we delve into troubleshooting, it’s important to understand the role of an inverter in a solar PV system. The inverter converts the direct current (DC) generated by solar panels into alternating current (AC) suitable for use by appliances and the electrical grid.

Identifying and Troubleshooting Common Inverter Issues

While inverters are generally reliable and built to last, some common issues may arise over time. Below are several common inverter issues and how to troubleshoot them:

1. No Display on the Inverter

If there’s no display on your inverter, it may indicate that it’s not receiving any power. Check the AC and DC isolator switches near the inverter to ensure they’re turned on. If the issue persists, it may be a sign of a more significant problem requiring professional attention.

2. ‘Isolation Fault’ Message

This error message indicates that the inverter has detected a leakage current to the ground. First, ensure all wiring is secure and not touching any metal parts of the inverter. If the problem continues, seek professional help as this could point to a faulty inverter or a problem with the PV panels.

3. Inverter’s Efficiency is Low

Inverters usually operate at high efficiency, but if you notice that your system’s productivity has dropped, it could be due to a faulty or aging inverter. Check the system’s output on a sunny day and compare it to the expected performance based on the PV system’s size. If the performance is significantly lower than expected, contact a professional to inspect the system.

4. ‘Over Temperature’ Error

Inverters can generate heat when operating. If the cooling system fails or if the inverter is exposed to direct sunlight for long periods, it may overheat. Ensure your inverter is installed in a well-ventilated area and out of direct sunlight. If the error message persists, you might need a professional to inspect the cooling system of the inverter.

Why Choose for Troubleshooting?

When encountering issues beyond simple troubleshooting, it’s essential to rely on professionals. offers excellent after-sales service and technical support to help troubleshoot and resolve issues. Their team of highly skilled and experienced professionals are equipped to handle a variety of inverter problems, ensuring your solar PV system remains efficient and effective.


While encountering problems with your solar inverter can be concerning, many issues can be resolved with basic troubleshooting steps. For more complex problems, professional help is often necessary. With a team of professionals like those at, you can ensure your solar PV system remains in optimal working condition, providing you with sustainable and cost-effective energy for years to come.

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