How Much Do Solar Panels Cost in the UK? (2026)
A plain, supplier-neutral breakdown of what solar panels actually cost a UK home in 2026 - by system size, with batteries, and after grants.
Check your eligibility freeThe short answer: typical UK solar panel costs in 2026
For most UK homes, a solar PV system costs somewhere between £5,000 and £9,000 fitted in 2026, before any battery storage or grant support. The exact figure depends on system size, roof complexity, panel quality and your installer - so treat any single "average" price with caution.
A useful rule of thumb is roughly £1,200 to £1,800 per kW of installed capacity. A small system for a one or two-bedroom home sits at the lower end, while a larger array for a four or five-bedroom house with high electricity use sits at the top, and adding a battery can push the total higher again.
Because we are independent and not an installer, we have no incentive to quote you high or low. The honest position is that prices have fallen steadily over the past decade and remain reasonable in 2026, partly because 0% VAT on domestic solar still applies (more on that below). Always compare at least three written quotes rather than accepting the first number you are given.
Solar panel cost by system size (3kW, 4kW, 5kW+)
System size is the single biggest driver of price. The table below shows typical installed costs in 2026 - panels, inverter, mounting and fitting included, but excluding battery storage. These are indicative ranges, not quotes:
| System size | Roughly suits | Typical 2026 cost |
| 3kW (around 7-8 panels) | 1-2 bed / lower usage | £5,000 - £6,500 |
| 4kW (around 10 panels) | 3 bed / average usage | £6,500 - £8,500 |
| 5kW (around 12-13 panels) | 4 bed / higher usage | £8,000 - £10,000 |
| 6kW+ (14+ panels) | Large home / EV / heat pump | £9,500 - £13,000+ |
Bigger isn't automatically better. The right size is the one that matches your roof space, your daytime electricity use and your budget. An installer fixated on selling you the largest possible array may be optimising their margin rather than your payback - a sensibly sized system you actually use beats an oversized one exporting cheap power.
What makes the price go up or down
Two homes wanting the "same" 4kW system can be quoted hundreds of pounds apart, and it is rarely the installer ripping anyone off - the variables genuinely differ. The main factors are:
- Panel and inverter quality - premium tier-one panels and hybrid (battery-ready) inverters cost more upfront but tend to perform and last better.
- Roof type and access - slate, complex or multi-pitch roofs, plus scaffolding for high or awkward properties, add labour and time.
- Battery storage - the biggest single add-on, covered in the next section.
- Electrical work - a consumer-unit upgrade, long cable runs or a meter change can each add cost.
- Bird protection, optimisers or a diverter - useful extras on some homes, optional on others.
One factor that should not push your price up is paperwork. A reputable installer registers the system, handles the MCS certification and DNO notification, and includes that in the quote. If a price looks suspiciously low, check what has been left out before assuming it is a bargain.
Adding battery storage: is it worth the cost?
A home battery lets you store daytime solar generation and use it in the evening instead of buying from the grid. It is the most common reason a solar quote jumps from around £7,000 to £10,000-£14,000 or more.
As a guide, a 5kWh battery typically adds £3,000-£4,500 installed in 2026, with larger 10kWh+ units costing more. Helpfully, the 0% VAT relief also covers batteries - including standalone retrofit batteries added later - until the relief is due to change in 2027.
Whether a battery pays for itself depends on your habits. If you are out all day and use most of your electricity in the evening, a battery can meaningfully cut your bills and is often worthwhile. If you are home during the day and already use power as you generate it, the case is weaker and you may be better starting with panels alone. There is no single right answer - it comes down to your usage pattern, not a salesperson's enthusiasm.
The hidden discounts: VAT, export payments and grants
The headline price is not what many households actually end up paying once support is factored in. Three things bring the real cost down:
- 0% VAT - domestic solar panels and batteries currently carry zero VAT in the UK, due to revert to 5% from 31 March 2027. On a typical install that relief is worth roughly £1,000-£3,000 versus the old rate, and it applies automatically through your installer.
- Smart Export Guarantee (SEG) - licensed suppliers in Great Britain pay you for electricity you export to the grid. Fixed rates of around 15-17p per kWh are common in 2026, typically worth a few hundred pounds a year depending on your system and habits. Northern Ireland is not covered by the formal SEG, though export arrangements exist via suppliers there.
- Grant funding - depending on your circumstances, schemes such as ECO4 can fully fund suitable measures including solar for eligible households, which can reduce your upfront cost dramatically or even to nothing. Eligibility is the key question, and it is worth checking before you pay full price.
If you want to know whether funding could cut your bill, it is genuinely worth checking what solar panel grants you might qualify for before committing to a paid quote - the difference can be thousands of pounds.
Payback, savings and what costs differ across the UK
Once installed, a typical system saves on bills through self-consumption plus export income. Most UK homes see a cautious payback of around 6-9 years, after which the electricity is effectively free for the remaining lifespan of the panels (commonly 25 years or more). Payback is faster with high electricity prices, good roof orientation, a sensible battery and an export tariff that suits your usage.
Costs and support also vary by nation. The figures above apply broadly across the UK, but the funding routes differ: England uses ECO4, GBIS and (for off-gas low-income homes) the Home Upgrade Grant; Wales has the Nest / Warm Homes scheme; and Scotland offers an interest-free loan of up to around £5,000 for solar PV through Home Energy Scotland rather than an outright grant. We map these honestly per nation rather than implying every household qualifies for free panels - because most do not.
The single best way to know your real number is to get quotes for your specific roof and check eligibility for support in parallel. Cost and funding together decide what solar actually costs you.
How Much Do Solar Panels Cost in the UK? (2026) — FAQs
How much do solar panels cost for an average UK home in 2026?
A typical 4kW system for an average three-bedroom home costs roughly £6,500-£8,500 fitted in 2026, before any battery storage. Smaller systems start nearer £5,000 and larger ones for high-usage homes can exceed £10,000. As a rough guide, expect around £1,200-£1,800 per kW of capacity. Always compare three written quotes, as prices vary with roof type and panel quality.
Do solar panels still have 0% VAT in 2026?
Yes. Domestic solar panels - and home batteries, including standalone retrofit batteries - currently carry 0% VAT in the UK. This relief is due to end on 31 March 2027, after which the rate is set to return to 5%. The saving applies automatically when your installer supplies and fits the system as a single contract, and is worth roughly £1,000-£3,000 on a typical install.
How much does it cost to add a battery?
A home battery is usually the biggest single add-on to a solar quote. A 5kWh battery typically adds around £3,000-£4,500 installed in 2026, with larger 10kWh+ units costing more. The 0% VAT relief also covers batteries until 2027. Whether it pays off depends on your usage - batteries suit households that use most of their electricity in the evening rather than during the day.
Can I get solar panels for free through a grant?
Some households can. Schemes such as ECO4 can fully fund suitable measures including solar for eligible homes - typically benefits-linked, lower-income or lower-EPC properties, with wider eligibility through LA Flex. Most households do not qualify for fully free panels, but partial support, 0% VAT and export payments still reduce the real cost. The only way to know is a free eligibility check - approval is never guaranteed.
How long do solar panels take to pay for themselves in the UK?
Most UK homes see a cautious payback of around 6-9 years, after which the electricity is effectively free for the rest of the panels' lifespan, often 25 years or more. Payback is faster with higher electricity prices, a south-facing roof, good daytime usage, a well-matched battery and a competitive Smart Export Guarantee tariff. Grant funding, where available, can shorten payback significantly.
Find out what solar grants you qualify for
Free, no-obligation eligibility check in under 60 seconds.
Start my free check