A typical 4kW solar panel system in the UK costs around £6,500 to £8,500 in 2026. If you add a solar battery, most homes are looking at £10,000 to £14,000.
- How much do solar panels cost in the UK?
- Solar panel cost by number of panels
- Average Solar Panel Costs in the UK
- How Much is Solar Battery Storage?
- What affects solar panel installation cost?
- How much can solar panels save you?
- What is the Smart Export Guarantee and how much can you earn?
- How long does it take for solar panels to pay back?
- Are solar panels worth it in the UK in 2026?
- Grants, VAT and funding for solar panels in 2026
- What’s included in a solar installation quote?
- Is your home suitable for solar?
- Why choose Heatable for solar?
The exact price depends on your roof, the number of panels, battery size, scaffolding, inverter choice, and installer markup. But for most households, those are the realistic ranges.
The better question is not just “how much do solar panels cost?” but “how much will my system cost, and how much could it save me?” That’s what this guide breaks down.
Eligible solar panel and battery installations also continue to benefit from 0% VAT until 31 March 2027, before reverting to 5% from 1 April 2027.
⚡ If you’re already thinking solar looks like a good shout, you can get a fixed price in 60 seconds with Heatable’s quote tool - no pushy calls, no awkward “just checking in” texts, just a free design and instant price.
🔑 Key Takeaways:
A typical 4kW solar panel system costs £6,500 to £8,500
A 4kW solar system with battery storage usually costs £10,000 to £14,000
A smaller 3kW system often costs around £5,000 to £6,500
The best benchmark for UK solar installation pricing remains the latest MCS installation cost data
The right benchmark for savings is the Ofgem price cap, not the old Energy Price Guarantee
Ofgem says the typical annual direct debit figure was £1,758 from 1 January to 31 March 2026, then £1,641 from 1 April to 30 June 2026
SEG export rates vary by supplier, and suppliers can set their own tariff structure as long as it remains above 0p/kWh
0% VAT applies to eligible solar and battery installs until 31 March 2027
A battery can increase how much solar electricity you use at home, but it does not automatically improve payback
How much do solar panels cost in the UK?
For most homes, solar panel costs fall into three main brackets:
System Size | Panels | Average Cost | Est. Annual Saving | Break-even |
3.0 kWp | 7-8 | £5,000–£6,500 | £350–£400 | 13–15 years |
4.0 kWp | 10 | £6,500–£8,000 | £465–£585 | 10–12 years |
4.0 kWp + Battery | 10 | £10,000–£14,000 | £585–£765 | 12–14 years |
*Savings vary by location, daytime usage, export tariff, and electricity prices.
That means the average UK homeowner is usually looking at mid-four figures for a standard solar install, or five figures once a battery joins the party.
Solar panel cost by number of panels
A lot of homeowners asking about solar costs are really asking: “How much would solar cost on my roof?”
Here’s the more useful version:
Number of panels | Approx. system size | Typical installed cost |
1 panel | ~0.4kW | £150–£350 for panel only |
4 panels | ~1.6kW | £3,000–£4,500 |
6 panels | ~2.4kW | £4,000–£5,500 |
8 panels | ~3.2kW | £5,500–£7,000 |
10 panels | ~4.0kW | £6,500–£8,500 |
12 panels | ~4.8kW | £7,500–£10,000+ |
A single panel might only cost a few hundred pounds on its own, but that is a bit like pricing a kitchen by the cost of one cupboard door.
The real installed price includes the inverter, mounting kit, labour, wiring, certification, scaffolding and whatever weirdness your roof decides to contribute.
Average Solar Panel Costs in the UK
The average cost of a solar panel system in the UK is usually between £5,000 and £8,500, depending on system size, roof type and kit choice.
The main things that affect the cost are:
System size: Measured in kilowatt-peak (kWp), larger systems cost more but generate more power.
Panel type: Premium monocrystalline panels (£1,000–£1,500/kW) are pricier than polycrystalline (£900/kW) or thin-film (£400–£800/kW).
Installation complexity: Roof size, height, angle, and shading affect labour costs.
Location: Labour rates vary, with London being the most expensive.
Additional components: Inverters, mounting systems, and optional batteries add to the total.
💷 The average cost of a solar panel system in the UK is between £5,000 and £8,000, depending on system size and type. Installation is usually included.
How Much is a Single Solar Panel in the UK?
A single 400W solar panel usually costs £150 to £350.
That price is for the panel only. It does not include installation, an inverter, the mounting system or electrical work.
For context, a typical 4.0 kWp system often needs around 10 panels, but the full installed cost is usually £6,500 to £8,500, not £1,500 to £3,500. That gap is where the rest of the project cost sits.
kWp stands for kilowatt peak. It is the maximum output a solar panel or solar array can produce under ideal test conditions.
🎥 Check out our YouTube video explaining how to calculate the return on investment (ROI) you can expect with solar:
How Much is Solar Battery Storage?
A solar battery will allow you to store the electricity your solar panels generate - so that you can sell the energy back to the grid or use it later e.g. in the evening.
In fact, a solar battery can allow you to use around 30% more solar energy, meaning that you could save around £180 a year on your energy and reduce your carbon footprint by around 15%.
On average a new solar battery will cost between £4,000 and £8,000 depending on the size, type and brand of the battery.
For example, one of the most popular solar battery brands is the Tesla Powerwall, which offers their batteries at around ~£7,995 for a battery which will provide capacity for the average three-bedroom house.
In general, the larger the battery the more it will cost. Sometimes, life really is that simple.
While there are major benefits to having a solar battery installed with your solar panel array, it's worth noting that they will increase your break-even point period, so it's important to factor this into the calculations.
Read more:
Do you need a G99 application?
What affects solar panel installation cost?
There is no single national “solar price” because roofs insist on being different.
The main things that move the quote up or down are:
1. System size
Bigger systems cost more overall, but often less per kW installed.
2. Panel efficiency
Higher-efficiency panels tend to cost more, but they can make sense on smaller roofs where space is tight.
3. Roof shape and access
A simple, accessible roof is cheaper to work on than a steep, awkward, many-angled one that looks like it was designed by a stressed-out architect on a deadline.
4. Scaffolding
This is a big one. Some installers treat scaffolding like a surprise subscription fee.
Heatable includes it in the quote, which matters because scaffolding can easily add hundreds of pounds to the job.
5. Inverter and battery choice
Premium kit costs more upfront, but can offer better performance, monitoring or warranty terms.
6. Location
Labour rates vary. Install costs in London and the South East are usually higher than in other regions.
🏡 Case Study: A Real Solar Installation
Case study: See how one Heatable customer saved £750/year with a 4.0 kWp system and battery in our detailed Q&A.
The image above shows a 23-panel solar installation, carried out by the MCS-certified solar team at Heatable, featuring the REA Fusion2 solar panels.
How much can solar panels save you?
For a typical UK home, a 4kW system might reduce annual electricity costs by around £400 to £650, before export payments.
Add a battery, and some homes may push total value from bill reduction plus export income closer to £500 to £850 a year.
The exact number depends on:
how much electricity you use
when you use it
whether you are at home during the day
whether you add a battery
your SEG export tariff
where you live in the UK
This is why two houses with the same system can see very different results. One family is home all day, using their own solar as it is generated.
The other exports half of it, then buys electricity back in the evening. Same roof, different maths.
Try it yourself: Use our Solar Energy Calculator to estimate savings based on your location and usage.
Solar savings should be judged against the Ofgem price cap
This bit matters.
A lot of solar content online still leans on old energy-price framing.
In 2026, the consumer reference point is the Ofgem energy price cap, not the old Energy Price Guarantee.
Ofgem says the cap for a typical dual-fuel household paying by Direct Debit was £1,758 per year from 1 January to 31 March 2026, then £1,641 per year from 1 April to 30 June 2026.
That does not mean every home pays exactly that amount. It is a benchmark based on typical household use. But it is still the right frame of reference when discussing likely savings.
What should you know before buying solar? Have a flat roof? Read all about flat roof solar and if you have a conservatory, it is possible to have solar on a conservatory roof too.
What is the Smart Export Guarantee and how much can you earn?
The Smart Export Guarantee (SEG) pays households for exporting excess solar electricity back to the grid.
Ofgem requires larger licensed suppliers to offer a tariff, but the market is not fixed-rate - suppliers are free to set their own prices and tariff structures.
In simple terms: the amount you earn can vary a lot.
That is why it is risky to write “you will earn X per year” as if it is universal. Some tariffs are generous, some are just polite.
The best-value system is often not the one that exports the most, but the one that helps you use more of your own solar at home.
How long does it take for solar panels to pay back?
For most homes, solar payback lands somewhere around 9 to 14 years for solar-only, and often 10 to 16 years with a battery.
That depends on:
upfront price
how much of your solar you use at home
your export tariff
electricity prices over time
whether finance is involved
Example:
A £7,500 solar-only system saving £600 per year has a simple payback of around 12.5 years
A £12,000 solar-plus-battery system delivering £800 per year lands closer to 15 years
That may sound long, but most quality solar panels are designed to last far longer than that. The key is to avoid overselling the best-case scenario. Solar works best when the numbers are honest.
Are solar panels worth it in the UK in 2026?
For many households, yes.
Solar panels are usually worth it in 2026 if:
you expect to stay in the property for a number of years
your roof is suitable
your daytime electricity use is decent
your quote is sensible
you are not overpaying for a battery you do not need
They tend to make the least sense when:
the roof is heavily shaded
usable roof space is limited
the install cost is unusually high
you may move soon
the system has been oversized for your usage
So the answer is not “always.” But for a lot of UK homes, solar has now moved from “nice green idea” to “serious household upgrade.”
Grants, VAT and funding for solar panels in 2026
There is no universal UK-wide “free solar grant” for everyone. But there are still schemes that may help some households.
0% VAT
Eligible solar panel and battery installs remain zero-rated for VAT until 31 March 2027, then move to 5% from 1 April 2027.
ECO4
The Energy Company Obligation (ECO4) may help eligible lower-income households living in less energy-efficient homes, though eligibility is conditional and not every household will qualify.
GOV.UK says owner-occupied homes typically need an EPC of D to G, while private rented homes usually need E to G, alongside benefit or qualifying criteria.
Warm Homes: Local Grant (England)
In England, the Warm Homes: Local Grant offers free energy-saving improvements to eligible households through local authorities.
GOV.UK says it is aimed at lower-income households in privately owned or privately rented homes, generally with EPC ratings from D to G.
Nest (Wales)
In Wales, Nest can provide free home energy improvements for eligible households, including solar panels as part of the package.
Scotland
In Scotland, funding routes are different. Home Energy Scotland says standard solar PV and energy storage systems are not available through its main Grant and Loan product, though other support and funding routes may exist depending on the measure and household circumstances.
What’s included in a solar installation quote?
A proper quote should usually include:
solar panels
inverter
mounting system
electrical components and wiring
labour
commissioning and certification
scaffolding
MCS-compliant installation
If scaffolding is not clearly included, ask. Seriously. Ask twice.
Is your home suitable for solar?
Solar works best when you have:
a roof with decent sun exposure
limited shading
enough usable roof space
a structure in good condition
household electricity use that matches the system size
South-facing roofs are not the only option. East- and west-facing roofs can still work well.
What matters more is whether the system is designed properly for your home instead of copied and pasted from someone else’s.
💬 “The smoothest install process I’ve ever had” – Phil Broadhurst - Actual Heatable customer (not just someone from marketing).
Why choose Heatable for solar?
Because getting a solar quote should not feel like joining a timeshare presentation.
With Heatable, you get:
fixed-price quotes
scaffolding included
MCS-certified installation
flexible finance options
bespoke system design
premium kit options
a faster, cleaner quoting experience than the usual industry faff
And most importantly, you get pricing that is built for actual homeowners, not just glossy brochures and vague promises.
Quick check: Use our roof suitability guide to see if solar is right for your home.
Final word
Solar panel costs in the UK are not pocket change, but they are now far more competitive than many homeowners assume.
For most households, the realistic number is £6,500 to £8,500 for a standard 4kW system, with battery-backed systems more often costing £10,000 to £14,000.
The best solar setup is not the biggest one, or the one with the flashiest brochure. It is the one that fits your roof, your usage, and your budget - while giving you a fair shot at long-term bill savings.
Next Steps for Your Solar Journey:
Check eligibility for ECO4 or other grants via your energy supplier or our funding guide).
Assess your roof using our solar suitability tool.
Get a free quote: Answer a few questions for up to 4 tailored, no-obligation quotes from MCS-certified installers. Start now.
Explore more:
Head to our solar advice hub or YouTube channel for expert tips and real customer stories.
