Solar Panel Cost UK 2026: Complete Price Guide
How much do solar panels cost in the UK in 2026? Full breakdown by system size, installation costs, battery add-ons, payback period, and savings. Updated pricing with 0% VAT.
How much do solar panels actually cost in the UK in 2026? It is one of the first questions every homeowner asks, and the answer has changed a lot over the past few years. The good news: prices have come down significantly since the post-pandemic spike, and with 0% VAT on residential solar installations, the upfront cost is lower than ever.
In this guide, we break down exactly what you can expect to pay for a solar panel system in the UK, from a small 3kW setup for a flat or terraced house, right up to a large 6kW+ system for a detached family home. We will cover the full cost breakdown, what affects your price, and crucially, how long it takes to earn your money back.
Average Solar Panel Costs in the UK (2026)
Solar panel prices in the UK depend primarily on system size, which is measured in kilowatts (kW). A typical UK household installs a system between 3kW and 6kW. Here is what you can expect to pay, fully installed, including 0% VAT:
| System size | Number of panels | Typical cost (installed) | Annual generation | Estimated annual savings |
|---|---|---|---|---|
| 3kW | 7 panels | £5,700 - £7,000 | ~2,550 kWh | £350 - £450 |
| 4kW | 10 panels | £6,600 - £8,500 | ~3,400 kWh | £550 - £650 |
| 5kW | 12 panels | £8,300 - £10,200 | ~4,250 kWh | £650 - £800 |
| 6kW | 14 panels | £10,000 - £12,460 | ~5,300 kWh | £800 - £1,000 |
These figures assume a standard pitched roof installation in England or Wales, using quality monocrystalline panels from a reputable manufacturer. Prices in Scotland and Northern Ireland are broadly similar, though generation figures are slightly lower the further north you go.
For a full breakdown at each size, including panel count ranges, 25-year lifetime savings, payback and common mistakes, see the dedicated cost pages for 4kW, 7kW, 12kW and larger systems, or the solar system cost overview.
What Is Included in the Price?
A solar panel installation is not just the panels themselves. Here is a typical breakdown of where your money goes:
Solar panels
The panels account for roughly 30-35% of the total cost. Modern panels in the 390-430W range from brands like Canadian Solar, Jinko Solar, or Trina Solar cost the installer around £100-£180 per panel wholesale. Premium brands like SunPower or REC cost more, typically £200-£300 per panel.
Inverter
The inverter converts DC electricity from your panels into AC electricity your home can use. A string inverter costs around £900, while microinverters (one per panel) add £800-£1,500 for a typical system. Hybrid inverters that work with battery storage cost £1,000-£2,000.
Mounting system and hardware
Roof hooks, rails, clamps, and cable management typically cost £300-£600 for a standard installation. Flat roof or ground-mounted systems cost more due to the additional framework needed.
Scaffolding
Almost every installation requires scaffolding for safe roof access. Budget £300-£500 for a typical two-storey house. Three-storey properties or complex roof layouts may cost more. Some installers include scaffolding in their quote; others list it separately, always check.
Installation labour
A team of two to three installers will typically complete a standard installation in one to two days. Labour costs vary by region but account for roughly 20-25% of the total price.
Electrical work and DNO notification
Your installer must notify your Distribution Network Operator (DNO) about the installation. This is a legal requirement and is usually included in the installation cost. The DNO notification itself is free, but the paperwork and electrical certification add to the labour time. See our DNO application guide for the difference between G98 and G99, and when each applies.
Typical cost breakdown for a 4kW system
| Component | Estimated cost |
|---|---|
| Solar panels (10x 400W) | £1,400 - £2,400 |
| Inverter | £700 - £1,200 |
| Mounting system | £300 - £600 |
| Scaffolding | £300 - £600 |
| Installation labour | £1,500 - £2,200 |
| Electrical work, testing, DNO | £400 - £700 |
| Total | £6,600 - £8,500 |
The wide range reflects differences in panel brand, inverter type, installer margins, and regional pricing. Most homeowners end up paying somewhere in the middle.
Battery Storage: How Much Extra?
Adding a battery storage system to your solar installation is increasingly popular. A battery lets you store surplus daytime generation for use in the evening, boosting your self-consumption rate from around 40% to 70-80%.
| Battery size | Typical cost (installed) | Best for |
|---|---|---|
| 3-5 kWh | £3,000 - £4,500 | Small households, 1-2 people |
| 5-8 kWh | £3,500 - £5,000 | Average household, 2-3 people |
| 8-10 kWh | £4,500 - £6,500 | Larger households, EV owners |
| 13.5 kWh (Tesla Powerwall 3) | £8,400 - £9,900 | High usage, energy independence |
It is cheaper to install a battery at the same time as your solar panels rather than retrofitting one later. Bundled solar-plus-battery packages often come with a hybrid inverter that handles both, saving you the cost of a separate battery inverter.
Factors That Affect Your Solar Panel Cost
Two homes on the same street could receive quotes that differ by £2,000 or more. Here is why:
Roof type and complexity
A straightforward south-facing pitched roof is the cheapest to install on. Complex roof shapes with multiple sections, skylights, or dormer windows take longer and may require additional mounting hardware. Flat roofs need angled frames. Slate roofs require more care than concrete tiles, which can add to labour time.
Location
Installation costs tend to be higher in London and the South East, reflecting higher labour and scaffolding costs. However, southern England also gets more sun, so the payback period is often similar or even shorter. You can browse installers in your area to compare local pricing.
Panel brand and quality
Budget panels from lesser-known manufacturers might save you £500-£1,000 upfront, but premium brands offer better efficiency, longer warranties, and slower degradation. Over 25 years, the difference in output can be significant. See our solar panel brands guide for a detailed comparison.
Inverter choice
Microinverters cost more than string inverters but offer better performance on partially shaded roofs and individual panel monitoring. The right choice depends on your specific roof conditions.
Installer
Prices vary significantly between installers, which is why we always recommend getting at least three quotes. An MCS-certified installer is essential, certification is required for you to claim the Smart Export Guarantee and confirms the installer meets quality standards.
0% VAT on Solar Panels
Since April 2022, residential solar panel installations in the UK have attracted 0% VAT, down from the previous 5% reduced rate. This applies to solar panels, battery storage, and other energy-saving measures installed in residential properties. The government has confirmed this will remain in place until at least March 2027.
This means the price you are quoted is the price you pay, no additional tax on top. For a £7,000 system, this saves you £1,400 compared to the standard 20% VAT rate, or £350 compared to the old 5% rate. Your installer should apply this automatically. If a quote includes VAT on a residential installation, ask why.
Solar Panel Payback Period in the UK
The payback period is how long it takes for your electricity savings and export income to cover the upfront cost of your system. In 2026, most UK homeowners can expect a payback period of 11 to 13 years, depending on:
- System cost: Lower upfront cost means faster payback
- Self-consumption rate: The more solar electricity you use directly, the more you save at retail rates (around 25p/kWh)
- Export tariff: Surplus electricity exported under the Smart Export Guarantee earns around 13-15p/kWh
- Electricity price inflation: If retail prices rise, your savings increase each year
- Location: Southern England systems pay back faster due to higher generation
Payback example: 4kW system on a 3-bed semi
A 4kW system costing £7,000 generates approximately 3,400 kWh per year. Assuming 40% self-consumption at 25p/kWh and 60% export at 13p/kWh, your annual benefit is:
- Self-consumed electricity: 1,360 kWh x £0.25 = £340 saved
- Exported electricity: 2,040 kWh x £0.13 = £265 earned
- Total annual benefit: £605
- Simple payback: 7,000 / 605 = ~12 years
With a battery, smart energy use, or higher electricity prices, payback can come in a little faster. Adding a battery boosts self-consumption to 70-80%, shifting more savings to the higher retail rate. And over 25 years, a 4kW system can save £15,000-£18,000 in total, roughly twice what you paid for it. For a detailed look at the financial case, see our guide on whether solar panels are worth it.
Smart Export Guarantee Earnings
The Smart Export Guarantee (SEG) requires energy suppliers with 150,000+ customers to offer a tariff for exported solar electricity. Current SEG rates typically sit around 13p to 15p per kWh, depending on the supplier and tariff type.
The best SEG rates tend to come with time-of-use conditions, you earn more for exporting during peak demand periods. Fixed-rate SEG tariffs offer simplicity at a slightly lower rate. A typical 4kW system exports 1,500-2,000 kWh per year, earning £200-£300 annually depending on your tariff and self-consumption pattern.
How to Reduce Your Solar Panel Costs
- Get multiple quotes. Prices vary by 20-30% between installers. Use our installer comparison tool to find MCS-certified installers near you.
- Check for local grants. Some councils and energy schemes offer additional funding. See our solar grants guide for current options.
- Consider financing. Solar financing options let you spread the cost, though the total cost will be higher due to interest.
- Time your purchase. Spring and early summer are the busiest periods for installers. Booking an autumn or winter installation may get you a better price.
- Bundle with a battery. Adding a battery at installation time is cheaper than retrofitting later, and the combined savings usually justify the extra cost.
Monthly Savings Estimates
To put the numbers in more practical terms, here is what typical monthly savings look like for different system sizes:
| System size | Monthly savings (no battery) | Monthly savings (with battery) |
|---|---|---|
| 3kW | £30 - £38 | £45 - £60 |
| 4kW | £45 - £55 | £65 - £85 |
| 5kW | £55 - £65 | £80 - £105 |
| 6kW | £65 - £85 | £95 - £125 |
These figures assume a mix of self-consumed and exported electricity at current UK energy prices. Actual savings depend on your usage patterns, tariff, and location. Use our solar savings calculator for a more personalised estimate.
Are Solar Panel Prices Still Falling?
Global solar panel manufacturing costs have fallen by over 90% since 2010, and wholesale panel prices continue to drop. However, the installed cost to UK homeowners has stabilised somewhat, as panels now represent a smaller share of the total, labour, scaffolding, and inverter costs have not seen the same dramatic reductions.
That said, the trend is still gently downward. Competition among UK installers is healthy, and increasing adoption helps keep prices competitive. Waiting for further price drops is generally not worth it, the savings you miss by delaying usually outweigh any future price reduction.
The Bottom Line
Solar panels in the UK cost between £5,700 and £12,460 depending on system size, with most homeowners paying £6,600-£8,500 for a well-sized 4kW system. With 0% VAT, falling panel prices, and electricity costs that show no sign of returning to pre-2021 levels, the financial case is as strong as it has ever been.
The key to getting the best value is getting multiple quotes from MCS-certified installers, choosing a system sized to match your actual electricity usage, and maximising your self-consumption. Use our solar calculator to estimate your savings, or start by checking whether solar panels are worth it for your situation.
John Rooney is the founder of Solar Info and has been covering the UK solar energy market since 2023. He researches every battery and inverter brand against manufacturer datasheets, MCS and Ofgem data, and feedback from the MCS-certified installers in our directory before publishing.