Solar PV systems are a great way to lower energy bills and reduce reliance on traditional power sources, but like any technology, they can sometimes develop issues. While most systems are reliable and require little maintenance, knowing the most common problems can help you spot them early and arrange professional support before performance is affected.
Common Issues That Can Affect Solar PV Systems
Solar PV systems are designed to last for many years, but small faults or environmental factors can reduce their efficiency. Here are some of the most common issues homeowners may experience.
Reduced Output from Dirt or Shading
One of the simplest reasons for a drop in solar performance is shading or dirt on the panels. Overhanging trees, nearby buildings, or even a build-up of dust, leaves, or bird droppings can block sunlight from reaching the panels. Cleaning panels and trimming back branches can often restore efficiency. In coastal areas like Brighton and Hove, salt residue from the sea air can also settle on panels, which may need more regular cleaning than inland systems.
Inverter Problems
The inverter is a crucial part of any solar PV system, converting the energy from the panels into usable electricity. If the inverter develops a fault, the whole system’s output can be affected. Common signs include error messages, lights on the inverter, or a sudden drop in energy production. Inverters generally need replacing once during the lifespan of a solar PV system, usually after 10–15 years, so planning ahead for this cost is sensible.
Loose or Faulty Wiring
Like any electrical system, solar PV relies on secure connections to operate safely. Over time, wiring can loosen, corrode, or become damaged. This may reduce performance or, in some cases, stop the system working altogether. Problems often show up as intermittent drops in performance or unexplained system shut-downs. A professional inspection can identify wiring problems quickly and restore normal function.
Weather-Related Wear and Tear
Although solar panels are designed to withstand harsh weather, strong winds, heavy rain, or extreme temperatures can sometimes cause damage. Cracks in panels, damaged seals, or movement in the mounting system can reduce efficiency and create safety concerns if left unchecked. In exposed locations, panels may also be more vulnerable to wind-driven debris or hail damage, making routine inspections an important part of ongoing care.
Monitoring System Errors
Many solar PV systems are linked to monitoring apps or displays that track performance. If there is an issue with the monitoring equipment, homeowners may see unusual readings or error messages. While this does not always mean the panels are underperforming, it makes it harder to track real-time energy production. Keeping an eye on monitoring data helps identify potential issues quickly, allowing you to call for support before they become serious.
Ageing Equipment
Solar panels can last 20–25 years or more, but components such as inverters, cabling, and mounting systems may need attention sooner. As the system gets older, regular checks become more important to ensure it continues to perform well and to replace parts before they fail completely. Without these checks, ageing equipment may reduce efficiency even if the panels themselves are still in good condition.
Preventing Common Issues
While some problems are unavoidable, many can be prevented through simple maintenance and timely inspections. Scheduling a routine check with a qualified electrician ensures that dirt build-up, loose connections, or early signs of wear are spotted before they affect your system. Preventive care is often far more cost-effective than waiting for a breakdown, and it helps keep your solar PV system producing clean energy year after year.
Need Help with Solar PV in Brighton or Hove?
Resistance Electrical provides professional support for solar PV systems, from inspections and maintenance to repairs and upgrades. Our qualified electricians can diagnose common issues, restore performance, and keep your system running safely. Call us today on 07935923323 or fill out our contact form to book your solar PV service.
