Solar Panel Maintenance Services in Wales
Annual solar panel servicing, performance checks and panel cleaning across all of Wales. Whether you bought your system from us or someone else, our engineers keep it generating at peak output.
A well-maintained PV system runs for 25–30 years. A neglected one loses 1–3% of output annually and can fail prematurely. The maintenance cost is trivial. The lost generation is not.
Why solar panels need maintenance
Solar panels have no moving parts, which is why so many homeowners assume they need no attention. In truth, every PV system has three failure points: the panels themselves, the inverter, and the DC and AC electrical connections. Each degrades differently, and each needs different checks.
Panels accumulate bird droppings, pollen, moss runoff and Welsh sea salt depending on location. Even a small obscured area on one cell can disable a whole string. Bypass diodes inside the panel junction box can fail silently, again killing string output. Inverters, which convert DC to AC for your house, contain capacitors and cooling fans that wear over time. The expected service life of a string inverter is 10–15 years; hybrid inverters with batteries are roughly similar.
Our annual maintenance visit catches all of this before it starts costing you money. We check string voltages, isolation resistance and earth bonding, then clean the panels and inspect every clamp, rail and cable run. You receive a written report with measured generation versus expected — so you know your system is performing.
What's included in a Welsh Solar service visit
A standard service takes between 90 minutes and three hours, depending on system size. We arrive in a fully equipped van with cleaning gear, electrical test equipment and replacement components for common parts. If anything needs replacing on the spot, we usually have it with us.
How often should solar panels be serviced?
Manufacturers and the MCS recommend an annual visual and electrical inspection. In rural Wales, where pollen and bird activity are higher, an annual clean is usually well worth it. In coastal areas, salt deposits make cleaning more important — we have customers in Pembrokeshire and Anglesey on twice-yearly schedules.
Most insurance policies and panel warranties require evidence of maintenance to remain valid. If you've never had a service certificate, your warranty cover may already be void. We can produce a baseline inspection report that re-establishes the maintenance record.
We offer rolling maintenance plans that include the annual visit, priority callout for any fault, and discounted parts. A single visit costs from £149. A plan with priority callout and parts cover starts at £18 per month for domestic systems.
Servicing systems we didn't install
Roughly half of our maintenance customers had their systems installed by someone else — often a company that has since gone out of business. We are happy to service any brand of panel, any inverter and any battery, regardless of who fitted it. Where firmware updates or commissioning passwords are needed, we usually have manufacturer training on the equipment to handle it.
If your original installer has disappeared and you have lost paperwork, we can usually reconstruct system documentation by surveying the equipment and downloading the inverter records. This is particularly helpful if you are selling your home and a buyer's solicitor asks for the MCS certificate.
Why annual servicing matters
Solar panels themselves require very little intervention, but the rest of your installation – the inverter, isolators, mounts, surge protection and electrical earthing – do degrade over time. Welsh weather is particularly hard on rooftop systems: salt-laden coastal air, freeze-thaw cycles in upland Wales and persistent damp in valley settings all take a toll on connections, gaskets and fixings.
Our annual service is designed to catch problems before they affect output. A typical service finds and fixes around three minor issues per system – loose roof hooks, corroded MC4 connectors, water-ingress points or warm DC isolators. Left unchecked, any one of these can reduce generation by 5-15% or, in worst cases, cause a system to trip off entirely.
What our service visits include
A standard Welsh Solar maintenance visit takes around 90 minutes and follows the MCS MIS 3002 service checklist. We arrive in a fully-equipped van with thermal imaging, IV-curve tracer and clamp meters. Every component is checked, every torque setting verified and a digital report uploaded to your account before we leave site.
- Visual inspection of all panels for cell damage, soiling and shading
- Thermal scan of array, junction box and DC string cables
- Test and verify all isolators, RCD/SPD and earth bonds
- Inverter firmware update and error log review
- Cleaning of panels if access and conditions permit
- Annual generation report compared to PVGIS expectation
Frequently asked questions
How much does solar panel maintenance cost?
A standard single-visit service for a domestic system costs from £149. Annual maintenance plans with parts cover start at £18 per month. Commercial servicing is quoted by system size.
Do I really need to clean my solar panels?
Yes — particularly in rural and coastal areas of Wales. Bird droppings, pollen and salt reduce output, sometimes by 10% or more. Rain alone does not remove these deposits.
Will you service panels you didn't install?
Yes. About half of our maintenance customers came to us from other installers. We service every major brand of panel, inverter and battery.
How long does a service visit take?
A typical domestic service takes 90 minutes to 3 hours. We perform cleaning, electrical testing, firmware updates and a written performance report.