Solar panels are designed to be reliable, with many systems continuing to generate electricity for 25 years or longer. That often leads homeowners to believe they can simply install their panels and forget about them.
While solar PV systems need a lot less maintenance than many other home systems, they aren’t completely maintenance-free.
Like any electrical system, components can wear down over time, connections can loosen, and performance can gradually decline without obvious warning signs. A regular solar PV health check helps identify small issues before they become expensive repairs or significantly reduce your energy savings.
If you’ve noticed your system isn’t performing as expected, here are seven warning signs that it might be time to book a professional inspection as soon as possible.
Signs Your Solar Panels Need a Health Check: 7 Major Signs
1. Your Energy Bills are Starting to Increase
One of the first signs that something might be wrong is an unexpected increase in your electricity bills. While seasonal weather naturally affects solar generation, a noticeable rise in energy costs despite similar household usage could mean your system isn’t producing as much energy as it should.
There are several possible causes for this, including:
- Underperforming panels
- Loose electrical connections
- Inverter issues
- Developing faults within the system
A professional solar panel efficiency check compares your system’s expected performance against its actual output, helping pinpoint whether a fault is affecting your savings.
2. Your Solar Generation Has Stopped
Most homeowners now have access to an inverter display or monitoring app that shows daily, monthly, and annual energy production. If you notice this has dropped compared to the same time last year, despite similar weather conditions, it shouldn’t be ignored.
Even gradual declines can highlight developing problems that become harder and more expensive to fix later. A professional annual solar inspection checks every part of the system, including:
- Panel performance
- DC and AC electrical connections
- String voltages
- Overall system efficiency
This helps confirm whether the reduced output is simply seasonal or because it’s the result of a developing fault.
3. Your Inverter is Showing Warning Lights or Error Messages
The inverter is often described as the heart of the solar PV system. It converts the electricity generated by your panels into usable energy for your home. If your inverter displays warning lights, fault codes, or persistent error messages, your system needs attention.
Common inverter issues include:
- Grid connection faults
- Overheating
- Internal component failures
- Communication errors
- Voltage irregularities
While some warnings might clear themselves, recurring alerts usually need a professional diagnosis. Ignoring them could mean your panels continue producing little-to-no usable electricity.
4. You Notice Physical Damage
Solar panels are designed to withstand years of harsh British weather. But, they’re not indestructible. It’s worth carrying out a visual inspection from ground level. Signs of physical damage that need professional help include:
- Cracked glass
- Damaged frames
- Loose mounting brackets
- Storm damage
Even minor physical damage can affect electrical performance or create safety concerns. Avoid climbing onto your roof yourself. A trained engineer has the equipment and expertise to inspect the system carefully while on your roof.
5. Your System is a Few Years Old & Hasn’t Been Serviced
While solar systems are low-maintenance, they still benefit from periodic servicing, especially if this hasn’t been the case for several years. Over time, components age naturally, electrical components degrade, and minor faults can gradually develop without triggering obvious warning signs.
If your system hasn’t been inspected in several years, it’s a great time to arrange solar panel maintenance in the UK. It’ll help maintain system performance, identify potential problems ahead of time, and reduce the likelihood of expensive repairs.
6. You’re Planning to Sell Your Home
A well-maintained solar system can be a valuable selling point for potential buyers.
Having evidence of a recent solar PV health check demonstrates your installation has been professionally inspected and is working properly. It can also highlight any issues before they delay a sale or become a part of buyer negotiations.
An inspection report offers added confidence that your renewable energy system has been properly maintained.
7. You Simply Want Peace of Mind
Sometimes, there isn’t an obvious problem at all. Your panels look clean, the inverter looks normal, and your electricity bill hasn’t changed dramatically. That doesn’t always mean everything’s working perfectly.
Small faults often develop gradually and can be unnoticed for months. Reduced efficiency, ageing electrical components, or declining inverter performance might only become obvious during specialist testing.
This is one of the biggest reasons why you should service solar panels regularly.
Spot Issues Before They Become Expensive Repairs
Many solar faults start as relatively minor problems. A loose connector, deteriorating cable, or underperforming panel mightn’t seem significant today. But, left unchecked, these issues can reduce energy generation, place additional strain on other components, and eventually lead to costly repairs.
That’s why preventative maintenance can be vital.
A professional inspection goes beyond checking whether your panels are generating electricity. It evaluates the overall health of the entire system, including the inverter, electrical connections, generation performance, and any connected battery storage, where applicable.
ServiceMy’s comprehensive Solar PV Health Check is specifically designed to spot hidden issues early, helping homeowners maximise efficiency while avoiding unnecessary costs.
Keep Your Solar System Performing at Its Best
Your solar panels are one of the smartest long-term investments you can make, but even the most reliable systems benefit from regular professional attention.
Whether you’ve noticed failing performance, rising electricity bills, inverter warnings, or simply want reassurance that everything’s working as it should, booking an annual solar inspection can help protect your equipment and your savings.
ServiceMy specialises in independent solar PV health checks across the UK, providing thorough inspections that identify faults, improve system performance, and give homeowners complete confidence that their renewable energy system is working at its best.
If it’s been a while since your last inspection, or you’ve never had one, it’s a great time to book your health check today and keep your system performing efficiently for years to come.
