Cost to Install Solar Panels UK: 2026 Price Guide
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Quick answer: how much does it cost to install solar panels in the UK?
For a typical UK home, expect roughly £6,000 to £9,000 for a straightforward rooftop solar PV installation without a battery. Energy Saving Trust’s current solar-panel guidance gives a benchmark of around £7,600 for an average 4.5kWp domestic system.
Larger arrays, difficult scaffolding, premium equipment, roof repairs or electrical upgrades can increase the total.
Battery storage is normally priced separately. Energy Saving Trust says a 5kWh battery system costs around £4,600, although battery prices vary widely.
Always compare quotes by system capacity in kWp, expected annual generation, equipment specification and included work — not simply by the number of panels.
Cost to Install Solar Panels UK: 2026 Price Guide for Homeowners
If you are budgeting for rooftop solar, a realistic starting point in 2026 is around £7,600 for an average domestic system. Energy Saving Trust currently uses that figure for a typical 4.5kWp installation. Your actual price can be lower or higher depending on system size, roof access, equipment, electrical work and whether you add battery storage.
This guide explains the cost to install solar panels in the UK, what should be included in a quote, which extras can move the price, and how to judge whether the investment makes financial sense for your home. It focuses on installed domestic solar PV rather than panel-only retail prices.
Want a property-specific figure? Get a free solar quote based on your roof, electricity use and preferred system.
Typical solar panel installation costs by system size
System size is measured in kilowatt-peak, or kWp. This is the combined rated output of the panels under standard test conditions. Panel count alone is a poor way to compare systems because modern panels come in different wattages.
The latest Department for Energy Security and Net Zero solar PV cost dataset was published in May 2026 and uses MCS installation data. Energy Saving Trust, meanwhile, says the average domestic system is about 4.5kWp and costs around £7,600.
| System size | Approx. panel count* | Indicative installed cost | Typical use case |
|---|---|---|---|
| 3kWp | 7 | £5,500–£7,000 | Smaller home or lower electricity use |
| 4kWp | 9 | £6,500–£8,500 | Typical family home |
| 4.5kWp | 10–11 | Around £7,600 benchmark | Average domestic system |
| 5kWp | 11–12 | £7,500–£9,500 | Higher use or more roof space |
| 6kWp | 13–14 | £8,500–£11,000 | Larger home, EV or higher future demand |
*Panel counts assume roughly 440–460W modules and are illustrative. Prices are planning ranges, not quotations. The ranges reflect current Energy Saving Trust guidance, the latest DESNZ/MCS cost data and 2026 installation-market pricing.
A bigger system does not automatically mean better value. The right size depends on usable roof area, shading, orientation and how much electricity your household can use or export. See the guide to solar panel output in the UK before judging a quote by kWp alone.
What is normally included in the installation price?
A proper solar quote should cover much more than the panels themselves. For a standard domestic installation, expect the scope to include solar modules, roof mounting hardware, an inverter, cabling, isolators, scaffolding, labour, electrical connection, commissioning and system monitoring where supplied.
The installer should also make clear who handles Distribution Network Operator requirements and what certification, warranties and handover documents you will receive. If a quote looks unusually cheap, check whether scaffolding, electrical upgrades or certification have been excluded.
This matters because a “panel price” and a finished, compliant system price are not the same thing.
What affects the cost of installing solar panels?
Two homes with the same number of panels can receive very different quotations. Installers are pricing the complete job, not just the hardware.
| Cost factor | Why it changes the price | What to check |
|---|---|---|
| System size | More panels, mounting and electrical capacity | Compare total kWp, not only panel count |
| Roof access and scaffolding | Height, conservatories and awkward access add labour | Confirm scaffolding is included |
| Roof type and condition | Slate, flat roofs or repairs may need specialist work | Ask whether roof work is excluded |
| Panel and inverter choice | Premium products, optimisers and microinverters cost more | Compare model numbers and warranties |
| Electrical work | Consumer-unit, earthing or cable upgrades can add cost | Ask about likely extras after survey |
| Battery storage | Adds hardware, controls and commissioning | Request solar-only and battery-inclusive prices |
Roof space can also influence product choice. Where area is limited, higher-output modules may justify a higher panel price because they can generate more from the available space. The best-value solar panels guide can help you compare purchase price against output, warranty and long-term value.
How much does a solar battery add?
Battery storage is optional. It stores surplus solar electricity for later use and can also work with time-of-use tariffs.
Energy Saving Trust says battery systems can cost about £1,500 to £10,000, with a 5kWh system costing around £4,600. Fitting a battery at the same time as solar can reduce installation costs because the installer is already on site and can design both systems together.
Do not judge a battery only by its headline capacity. Compare usable capacity, power output, warranty, expected cycling, inverter compatibility and whether backup power is included.
A battery can increase the amount of solar electricity you use yourself. However, it also raises the upfront investment, so its financial value depends heavily on your consumption pattern and import and export tariffs.
VAT, grants and finance in 2026
Under current HMRC rules, qualifying solar panels supplied and installed in homes benefit from 0% VAT across the UK until 31 March 2027. The treatment of equipment bought without qualifying installation is different, so check exactly what your installer is supplying. Check HMRC’s current VAT rules for solar panels
Government support is also changing. The UK Government’s Warm Homes Plan includes low- and zero-interest finance for solar panels and batteries, alongside targeted support for low-income and fuel-poor households. A Warm Homes Loan Scheme is also being developed with participating lenders.
Availability, timing and eligibility can vary. Northern Ireland also has different arrangements in several areas.
Do not subtract a grant or finance saving from your budget until you have confirmed that your household, property and proposed installation qualify.
How much can solar panels save, and what is the payback period?
Solar savings come from two places: electricity you generate and use yourself, and electricity you export.
Using your own solar electricity reduces the amount you need to buy from the grid. From 1 October to 31 December 2026, Ofgem’s average capped electricity unit rate for a Direct Debit customer in England, Scotland and Wales is 26.32p/kWh. Actual rates vary by region and tariff.
For exported electricity, the Ofgem Smart Export Guarantee guidance explains that participating suppliers must offer eligible small generators a positive export tariff. Suppliers choose their own rates, contract terms and eligibility processes.
Energy Saving Trust currently gives example solar-panel payback periods of roughly 9–12 years across London, Manchester, Aberystwyth and Stirling when export payments are included. These estimates are not guaranteed returns.
Your result will depend on roof orientation, shading, location, electricity use, export tariff, future energy prices and replacement costs. Energy Saving Trust also notes that panels can last 25 years or more, while an inverter may need replacing after around 12 years.
How to compare solar installation quotes properly
Start by making every installer price the same brief. If one quotation covers 4kWp while another covers 5kWp plus a battery, their headline totals are not directly comparable.
Check:
Total solar capacity in kWp and exact panel models.
Expected annual generation and the assumptions behind it.
Solar-only price and battery price shown separately.
Scaffolding, mounting, electrical work and monitoring.
DNO application or notification responsibilities.
MCS certification where applicable and export-payment eligibility.
Product, performance and workmanship warranties.
Any exclusions, provisional sums or possible survey extras.
A site survey is where many cost uncertainties are resolved. Read what to expect from a solar panel installation survey and use the solar panel installation quote guide to compare written proposals consistently.
Energy Saving Trust recommends obtaining at least three quotes from MCS-certified installers.
Is it worth paying to install solar panels?
Solar is easier to justify financially when your roof is in good condition, shading is limited, you expect to remain in the property for several years and you can use a reasonable share of the electricity generated.
Higher future electricity demand from an EV, heat pump or increased home working can also alter the economics.
The case may be weaker when substantial roof repairs are imminent, useful roof area is very limited, shading is severe, finance is expensive or you expect to move before the estimated payback period.
Do not focus only on the cheapest quotation. Compare the installed price with credible generation estimates, equipment quality, warranty protection and the likely value of the electricity you will use or export.
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A typical domestic installation costs roughly £6,000–£9,000 without a battery. Energy Saving Trust currently gives an average figure of around £7,600 for a 4.5kWp system.
Many three-bedroom homes use around a 3.5–4.5kWp system. A budget of roughly £6,500–£8,500 is reasonable for a straightforward installation, although electricity consumption and roof space matter more than bedroom count.
Ten modern 440–460W panels create roughly a 4.4–4.6kWp system. For a normal domestic installation, a planning budget of around £7,000–£9,000 is reasonable before adding a battery or unusual roof work.
Around £6,500–£8,500 is a useful current planning range for a straightforward 4kWp domestic system. Your roof, equipment and electrical requirements can move the price.
Energy Saving Trust says battery storage can range from about £1,500 to £10,000, with a 5kWh battery system costing around £4,600.
Qualifying domestic solar installations currently benefit from 0% VAT under HMRC rules. The zero rate is scheduled to run until 31 March 2027.
There is no single universal cash grant available to every homeowner. However, the Warm Homes Plan includes targeted support for lower-income households and government-backed low- and zero-interest finance for technologies including solar and batteries.
Energy Saving Trust's current examples give approximately 9–12 years for several locations in England, Scotland and Wales when export payments are included. Your own payback could be shorter or longer.
Eligible generators in Great Britain can receive export payments through the Smart Export Guarantee. Suppliers set their own rates and terms.
Using an MCS-certified installer provides recognised quality assurance and is important where you want an MCS certificate for purposes such as Smart Export Guarantee eligibility. For installations up to 50kW, Ofgem's SEG rules require MCS certification or an equivalent standard.
It often is, but never assume this. Ask the installer to confirm scaffolding, access equipment and any additional scaffold required around extensions or conservatories in writing.
If the roof will need significant work soon, repairing or replacing it first can avoid paying later to remove and reinstall the solar array. A survey should identify obvious roof-condition concerns.
Yes. Solar PV works from daylight rather than heat. Generation is normally lower in winter because days are shorter and sunlight levels are lower.
Routine maintenance is generally limited. Energy Saving Trust says panels can last 25 years or more, although an inverter may need replacement after around 12 years.
It depends on the interest rate, fees and term. Compare the total amount repayable with the expected energy savings rather than assessing finance only by its monthly payment.
Conclusion
For most homeowners, the cost to install solar panels in the UK in 2026 is best treated as a range rather than one fixed national figure. Around £7,600 is a useful current benchmark for an average domestic system, while many straightforward installations sit roughly within the £6,000–£9,000 range before battery storage.
The most useful next step is to obtain like-for-like quotations based on your actual roof and electricity consumption. Check system size, generation assumptions, included works, warranties, export eligibility and possible extras before committing.
A good quotation should make clear not only what the system costs, but exactly what you are receiving for the money and how the financial estimates were calculated.
Ready to price your project? Compare suitable solar quotations through Get Free Quote before deciding which installation offers the strongest overall value.
