Solar panel repair cost and renewable energy fixes

Solar panel repair costs in the UK vary by fault, roof access and whether scaffolding is needed, so it is best to get an itemised quote from a current installer before booking. What you pay depends on the fault, roof access and whether scaffolding is needed.

Most household solar problems are not the panels themselves. The inverter, the wiring, the isolator switches and pest damage account for the majority of faults, and several of these fall under warranty or home insurance rather than an out-of-pocket bill. Free Price Compare sources energy figures from Ofgem, gov.uk and MCS-linked data, and this explainer sets out what breaks, what it costs to fix, and how repairs affect any export income from your renewable energy.

Last updated: August 2026

Written by the Free Price Compare editorial team | Reviewed August 2026

How much does solar panel repair cost in 2026?

Solar panel repair in 2026 costs around £80 to £150 for a call-out and fault diagnosis, rising to £250 to £500 to replace a single panel and £800 to £2,000 to replace a failed inverter (BestBuilders, indicative Q3 2026). Where the roof cannot be reached safely from a ladder, scaffolding may add significantly to the total job cost. Smaller electrical fixes, such as a loose connector or damaged DC cable, often sit at the lower end of repair pricing, plus labour. Prices vary by region, roof height and how quickly you need the work, so always get an itemised quote before booking.

Figures are indicative and may change.

If you are weighing repair against a full replacement, it is worth checking current installed prices too. Our guides on solar panels and battery storage from Effective Home and Evergreen Power solar installation set out typical system costs so you can compare like for like.

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What should I do if my solar panels break?

Isolate the system first if your solar panels break or show damage, because a cracked or broken panel can still produce dangerous DC voltage in daylight even with the inverter switched off. Turn off the AC and DC isolator switches, do not touch exposed wiring, and keep clear of any fallen or shattered glass. Then contact your original MCS-certified installer or another accredited engineer, because DIY work on a live solar array is unsafe and can void your warranty and insurance. Take dated photographs of the damage, as these help both a warranty claim and a home insurance claim.

Broken panels count as WEEE (Waste Electrical and Electronic Equipment) under UK law, so they cannot go in a household bin or a skip and must be disposed of through a proper recycling route. A reputable installer will remove and recycle old panels as part of the job. Before paying for anything, check whether the fault is covered under a manufacturer warranty (panels commonly carry 10 to 25-year warranties) or your home buildings insurance, which can cover storm and impact damage. The **Energy Saving Trust** says solar panels should last **25 years or more**, and it notes that the inverter usually needs replacing after **around 12 years**.[18]

How do I know something is wrong with my solar system?

The clearest sign of a solar fault is a drop in generation on your inverter display or monitoring app that is not explained by the weather or the season. Compare your current daily and monthly output against the same period last year. A red or amber fault light on the inverter, an error code, unusually low readings on a sunny day, or a tripped isolator all point to a problem worth investigating. Visible issues such as cracked glass, discoloured cells, scorching around a connector or a burning smell need immediate attention and system isolation.

• Generation lower than expected on bright days compared with previous years.
• Fault codes or warning lights on the inverter.
• Cracked, cloudy or discoloured panels, or a browned connector.
• Frequent tripping of the solar isolator or consumer unit.

Why is the inverter the most common repair?

The inverter is the most common solar repair because it is the hardest-working component, converting DC electricity from the panels into AC for your home continuously in daylight. Most string inverters last around 10 to 15 years, so if your system was fitted in the 2010s an inverter replacement is a normal, expected cost rather than a defect. Replacement typically costs £800 to £2,000 depending on size and type (BestBuilders, Q3 2026). Panels themselves fail far less often and usually carry much longer warranties, which is why the panels commonly outlive the first inverter.

When budgeting for solar over its lifetime, treat at least one inverter change as a planned maintenance item rather than an unexpected bill. Battery-based systems have their own inverter or hybrid unit, which adds a component that can wear over time. If you are researching batteries alongside panels, our guide to Clever Energy solar panels and battery storage covers how the two work together.

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Will I lose my feed-in tariff if I replace the inverter?

Replacing a broken inverter does not end your Feed-in Tariff, provided you keep the system MCS-certified and do not increase its total capacity beyond what your agreement covers. The Feed-in Tariff (FiT) closed to new applicants in 2019, but existing accredited households keep their payments for the term of their agreement. Swapping a faulty inverter for an equivalent replacement is a repair, not a new installation, so it does not affect eligibility. Always tell your FiT licensee about the change, keep the MCS paperwork, and avoid uprating to a larger inverter that would push your system above its registered capacity.

Is solar panel maintenance worth paying for?

Solar panel maintenance costs around £80 to £200 for a service and is worth paying for on older systems or where output has fallen, because a service checks the inverter, wiring, isolators, mounting and generation performance before small issues become expensive failures (MyJobQuote, 2026). Panels have no moving parts and are largely self-cleaning in UK rainfall, so most homes do not need frequent professional cleaning. An annual or periodic service makes more sense for larger arrays, roofs prone to leaf litter or bird fouling, and systems approaching the end of their first inverter’s life.

Regular monitoring through your inverter app is the cheapest form of maintenance, because catching a generation drop early lets you fix a minor fault before it costs more. If pigeons are nesting under the panels, bird proofing at around £400 to £900 both protects the wiring and prevents ongoing droppings damage. For everyday running costs, reducing wasted electricity elsewhere in the home helps too; our guide on standby power and how to cut it pairs well with solar generation.

Does home insurance cover solar panel damage?

Home buildings insurance usually covers solar panel damage from storms, impact, fire, theft and vandalism, but wear and tear, gradual deterioration and mechanical or electrical failure are normally excluded. According to the ABI, the average combined buildings and contents insurance premium was £395 in the second quarter of 2025. To be covered you generally need to have declared your roof-mounted panels to your insurer, as they are a permanent fixture that can affect rebuild value. Check whether your policy covers the panels and any battery, whether accidental damage is included, and whether there is a single-item limit. Manufacturer warranties are the route for premature panel failure or an inverter fault within its guarantee period, so a claim often means deciding between warranty and insurance depending on the cause.

If storm damage is involved, photograph everything, keep the installer’s report and quote, and contact your insurer before authorising repairs. Declaring solar panels rarely adds much to a premium, but failing to declare them can leave a claim unpaid. When you next review cover or tariffs, it is a good moment to check your wider energy setup as well.

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How do solar panels cut bills against the price cap?

Solar panels cut bills by generating electricity you would otherwise buy at the capped unit rate, which averaged 26.11p per kWh with a 57.19p daily standing charge on a standard variable tariff paying by Direct Debit from 1 July to 30 September 2026, according to Ofgem. Every unit you self-consume avoids that rate, and a typical 4kW system can save a household a meaningful amount on electricity depending on usage and how much generation is used during daylight. The price cap sets maximum unit rates and standing charges for a typical user, not a fixed total bill, so your actual saving depends on how much of your generation you use at home.

Timing matters. Households on the standard variable tariff sitting above the price cap floor gain most by shifting appliance use, such as washing and dishwashing, into daylight hours when panels are producing. The gov.uk zero rate of VAT on qualifying solar and battery installations runs to 31 March 2027, which keeps upfront installation costs lower for now. Batteries increase self-consumption further by storing daytime generation for evening use.

What are the best smart export guarantee rates?

The best Smart Export Guarantee rates in August 2026 came from suppliers paying 17.5p to 25p per kWh where they installed the system, with ordinary bundled tariffs paying around 12p to 15p and standalone tariffs that need no supplier switch paying only 3p to 6p (Free Price Compare research, August 2026). The Smart Export Guarantee (SEG) is a scheme under which Ofgem-licensed suppliers with 150,000 or more customers must offer at least one tariff paying you for electricity you export to the grid, though they set the rate themselves above zero. To qualify you need an MCS-certified installation and a smart meter capable of half-hourly export readings. Typical annual SEG earnings run from around £75 to £640 depending on system size and tariff.

Because rates and eligibility change frequently and some headline tariffs are tied to using a specific installer, compare current SEG offers rather than relying on last year’s figures. Our guide to the So Energy solar panel and SEG tariff explains how export payments work in practice, and the Soly solar installation guide covers system sizing for export.

Is renewable energy for home use worth it now?

Renewable energy for home use can be worthwhile for households that own their roof, can use daytime electricity and plan to stay put, because solar panels commonly last 25 years or more. A standard 4kW system has a substantial upfront cost, and adding battery storage increases the total further, although qualifying domestic installations are currently zero-rated for VAT until 31 March 2027. The case is strongest where you self-consume most of your generation and earn export income on the surplus. HMRC’s VAT Notice 708/6 says a **zero rate applies to the installation of certain specified energy-saving materials from 1 May 2023 to 31 March 2027**, and this includes wind turbines in residential accommodation on the same timetable.[1]

Renewable, low-carbon supply is separate from generating your own power. Many suppliers offer green or renewable tariffs backed by certificates, and choosing one reduces the carbon footprint of the electricity you still import. If a full installation is not affordable now, a leasing or subscription model spreads the cost; our guide to the Sunsave solar panel subscription explains how those arrangements work. Government support is also expanding through the Warm Homes Plan, which is replacing schemes such as ECO4.

Explore solar and battery guides

• Clever Energy Solar | Solar Panels & Battery Storage UK
• Effective Home | Solar Panels & Battery Storage UK
• Soly Solar Panel | UK Solar Installation & Battery Storage
• Go Green with Purelec Energy Solar Panel Installation
• Evergreen Power | Solar Panels & Battery Storage UK

Information correct as of 24 August 2026. Prices, tariffs, policy details and providers change frequently, so please check the latest details before making a decision. This article is for general information only and does not constitute financial advice. Free Price Compare is authorised and regulated by the Financial Conduct Authority (FCA).