Solar Panel Maintenance in Scotland: Cleaning, Checks and Repairs

Information checked: 18 October 2026.

Solar panels need relatively little routine attention. The useful habit is knowing what your system normally produces and noticing when something changes. A lower reading in December is expected. An inverter that repeatedly stops on bright days needs a closer look.

We carry out solar panel maintenance and repairs across Central Scotland, including systems installed by other companies. Before booking work, it helps to separate a cleaning job from a monitoring problem or an electrical fault. Each needs a different approach.

Does your array need cleaning?

Rain clears much of the dirt from many pitched arrays. Persistent bird droppings, leaves or other build-up can still need attention, especially where trees overhang the roof. The Energy Saving Trust's maintenance guidance recommends assessing the panels' condition and cleaning when needed.

We'd look at the contamination, access and the panel manufacturer's instructions before recommending a clean. Paying for one every year won't resolve an inverter warning or a failed connection. If generation has dropped suddenly, start with our guide to solar panels not generating.

Don't climb onto the roof, walk on panels or start scraping the glass. Avoid pressure washers and unapproved chemicals. A suitable cleaning method depends on the equipment, and safely reaching it is part of the job.

Keep an eye on generation and monitoring

A monthly generation record gives you something to compare with. Allow for seasonal daylight, weather and any new shading before drawing conclusions from a change in output. There isn't a single percentage drop that diagnoses a fault on every house.

If the app stops updating after a router or Wi-Fi password change, look at the safely accessible inverter display or generation meter as well. The system may still be producing electricity. Keep the exact warning message and the time it appeared rather than clearing it before someone can investigate.

At a Fintry property, we investigated missing data from an optimiser. The job involved a poor internet connection as well as installation faults. Our remedial work included a hardwired connection, replacement optimisers, a correctly rated DC isolator and monitoring setup for the separate battery system. Getting the app online was one part of that repair.

When an inspection is more useful than a clean

Arrange an inspection if generation repeatedly stops during usable daylight, a breaker keeps tripping or the inverter reports recurring faults. Damaged cables, signs of overheating or water inside electrical equipment need professional attention. Keep clear of the equipment; if there is smoke or fire, leave the area and call 999.

On a Dunblane callout, a suspected meter problem turned out to be a melted DC isolator. We made the system safe and discussed the options with the homeowner, who chose a Fox ESS hybrid inverter and battery upgrade. That was a decision for that installation, rather than a reason to replace every older inverter.

You can note what is visible from the ground and photograph a safely accessible display. Don't open enclosures, unplug solar connectors or try electrical tests. Solar equipment needs proper isolation, and switching off the house supply does not make every part of the array safe to touch.

Inverter replacement and repair costs

We'd need to know what's wrong before quoting. A cleaning visit, a monitoring fault and a replacement inverter have different scopes. Roof access, replacement parts, cable or isolator repairs and testing can all affect the price.

If an inverter does need replacing, check what the installed quote includes and whether the new equipment suits the existing panels, monitoring and any battery. Keep warranty documents handy. Age alone doesn't tell us that a working unit needs replaced.

Our fault-finding guide explains inverter replacement costs and the information needed to assess the job. If you're considering storage at the same time, we can also assess battery options for an existing solar system.

Servicing, paperwork and older systems

Follow the maintenance requirements for your actual equipment. A service interval should take account of its condition, environment and manufacturer guidance. Don't wait for a scheduled visit if a fault develops.

Keep the original installation documents, equipment details, warranties and any records of repairs. If the house came with solar and the paperwork is missing, tell us what you have; you can still enquire about an inspection.

For a system receiving Feed-in Tariff payments, discuss proposed changes before work starts. Ofgem's guidance allows repair and replacement where scheme rules continue to be met, with notification of modifications. Changes involving batteries or metering need particular care.

Don't budget on a general Home Energy Scotland grant for routine solar maintenance or an inverter upgrade. Its current funding offer does not list these as ordinary funded measures. Solar PV-T is a different technology from a conventional solar PV array. Our Scottish battery funding guide explains the distinction if you're also considering storage.