Below we’ll look at the most common problems with solar panels, and for every problem we present, we’ll also provide a solution.
Weighing solar up in general? Our guide to the advantages and disadvantages of solar energy sets out the trade-offs honestly, including the ones most installers skip.
Common Problems With Solar Panels
- Inverter problems
- Low electricity production
- Loose electrical connections
- Damaged panels
- Dirty panels
- Lack of maintenance
- Shading issues
- Nesting problems
Inverter Problems
Most people are attracted to the 20–25 year warranty solar panels come with. The problem is, this warranty applies to the panels themselves — not the entire system. Inverters, as a hardworking part of that system, won’t last nearly as long as the panels.
Your inverter converts the energy your panels produce from Direct Current (DC) to Alternating Current (AC), which our home appliances use. If it stops working, you can’t use the electricity your panels produce, meaning you’ll be paying grid prices. Increased energy bills are usually a sure sign the inverter isn’t working properly, and most inverters display a fault code when something is wrong.
Solution
- Check the error code on the inverter and follow the manufacturer’s instructions (it may be as simple as switching it off and on again)
- Contact the manufacturer directly for advice
- Contact an installation company to discuss replacement
Low Electricity Production
You should know roughly how much electricity your panels typically produce day to day, so you can react quickly when something goes wrong. Low production is a common problem that could indicate a fault. Here are some common causes:
| Seasonal Variation | If your panels were installed in summer, you might think there’s an issue when they produce less in winter. This is normal as the seasons change — take note of the time of year before worrying. |
| Malfunctioning Parts | The most concerning cause. If your panels suddenly drop off in production, there’s likely a fault — the panels, the wiring, or the circuit breakers. |
| Gradual Performance Loss | If your panels produce less and less over the years, this is perfectly natural. Efficiency drops off slowly, but it will drop off. Take note of your system’s age before worrying. |
Solution
- Contact solar panel experts to come out, diagnose, and fix or replace the problematic parts
Loose Electrical Connections
Solar panels use far more wires than most people realise, and given they’re exposed to the elements on your roof, accidental disconnections are more common than most realise. Loose connections are easier to fix, but if there’s a fault with the wiring you’ll need more specialist help.
Solution
- If you have the relevant safety equipment and training to work on roofs, check your panels for signs of a loose connection and reconnect where necessary
- Alternatively, contact the experts to do the same for you if you’re nervous around solar technology or roofs
- Experts may need to replace the wiring if it’s faulty and can’t be salvaged
Damaged Panels
If your panels become damaged they won’t perform at their best. While all panels are designed to withstand the elements, cracks and damage can occur — something dropped from a height, poor installation, or thermal expansion. The silicon in the cells is thin and expands and contracts with temperature changes, which can lead to micro-cracks and a drop in efficiency.
Solution
- Replace the damaged panels with a solar panel installation company
You won’t necessarily need a whole new system, especially if your panels aren’t nearing the end of their life. It’s important to replace broken panels, though, because without microinverters your whole system can be affected by one low-performing panel.
Dirty Panels
Solar panels are generally self-cleaning, especially in the UK where rain is common. But after a dry spell there may be a buildup of dirt and grime. Even a thin layer of dirt blocks direct sunlight from reaching your cells, making the whole process less efficient.
Solution
- Climb up a ladder to wipe down the panels with a soft cloth and warm water (with appropriate safety precautions)
- Hire or buy a long-handled wiper to clean your panels from the ground with warm water
- Call out the professionals to clean your panels for you
Lack Of Maintenance
Sometimes solar panels simply need a little care to keep working the way they should. Maintenance can involve tests, checks, fixes, and replacements on almost any part of the system, including the panels, battery, inverter, racking, charge controller, wiring, electrical panel and power meter. A professional service checks everything is in full working order.
Solution
- Contact a solar panel installation company that offers maintenance services
Shading Issues
When your panels are first installed they’ll usually be placed in the optimal position for maximum sunlight. Sometimes things change — new buildings, growing trees, or new structures can create shade where there was none.
Solution
- If the shading is on your property, consider pruning any nearby trees affecting the panels
- If it’s not on your property, consider having your panels moved by professionals if there’s a better place for them now
Nesting Problems
Solar panels are excellent for nature too, especially nesting birds like pigeons — and these can create a real problem. Their droppings and nesting material affect the panels’ efficiency, and nests built underneath can disrupt the wiring.
Solution
- Hire a pest control company to safely remove the nests, then carry out bird proofing to prevent it happening again
- Any damage will need to be fixed by a solar company
Common Problems With Solar Panels Roundup
The best thing you can do to avoid problems is to work with a professional installation company from the start. By working with DES Renewable Energy, you can ensure your panels are positioned perfectly and the installation is carried out professionally, reducing the risk of loose connections or damage.
Noticed a problem with your solar panels? As MCS-certified installers across Dorset, Hampshire and Wiltshire, DES Renewable Energy services, repairs and maintains solar systems. Get in touch and we’ll do our best to set it right.