If you’ve been trying to work out how much do solar panels cost in the UK, you’ll have noticed that the internet is not particularly helpful. You’ll find everything from “around £4,000” to “up to £15,000 or more,” often on the same page, with no real explanation of what drives the gap.
So here’s the honest answer upfront: for a typical domestic solar installation in 2026, you’re looking at roughly £5,500 to £8,500 for a standard 4kW to 5kW system without battery storage, or £10,000 to £14,000 if you include a decent battery. Those are installed costs including all equipment, labour, scaffolding (usually), and VAT at 0%.
Why such a range? Roof type, system size, inverter choice, scaffolding complexity, battery capacity, and where you live all move the number. This guide breaks down each one so you can go into a quote conversation knowing roughly what you’re looking at.
For a broader overview of how solar PV works and whether it’s the right choice for your home, see our guide on whether solar panels are worth it.
Typical solar panel costs in 2026
These are indicative installed costs for common system sizes in the UK as of 2026, based on current MCS data and industry averages. Actual quotes will vary.
| System size | Panels (approx) | Installed cost (no battery) | Installed cost (with ~10kWh battery) | Annual generation (est.) | Rough payback |
|---|---|---|---|---|---|
| 3kW | 7–8 | £5,000–£7,000 | £9,000–£12,000 | 2,400–2,800 kWh | 10–14 years |
| 4kW | 10–12 | £5,500–£8,500 | £10,000–£14,000 | 3,200–3,800 kWh | 9–12 years |
| 5kW | 13–15 | £7,000–£9,500 | £11,500–£16,000 | 4,000–4,700 kWh | 10–13 years |
| 6kW+ | 16–18+ | £8,000–£11,000 | £13,000–£18,000+ | 4,800–5,600 kWh | 10–14 years |
Payback ranges assume a south- or south-west-facing roof, current electricity prices (Ofgem cap rate of around 24.67p/kWh for Q2 2026), and a SEG export rate of 12–15p/kWh. They are conservative. A household with high daytime occupancy, good self-consumption, and an optimal roof will do better. An Edinburgh household with a north-east-facing roof will do considerably worse.
What’s actually included in a solar panel quote
This is where a lot of buyers get caught out. Panel cost on its own is often only 30–40% of the total installed price. The rest breaks down roughly like this:
Solar Panels themselves. Modern monocrystalline panels are efficient and the dominant choice for domestic installs. The panels on a 4kW system might cost £1,500–£2,500 depending on brand and wattage.
Inverter. The device that converts DC electricity from your panels into AC for your home. A string inverter for a 4kW system costs roughly £700–£1,200 installed. Microinverters and hybrid inverters (battery-ready) cost more.
Mounting system. The racking and fixings that attach panels to your roof. Typically £300–£600 depending on roof type.
Cabling and electrical work. Running DC cabling from the roof to the inverter, and AC cabling to your consumer unit. Not glamorous, not cheap.
Scaffolding. Often included in quotes, but not always. For a two-storey house, scaffolding hire typically adds £400–£800. Always ask whether it’s explicitly included.
Installation labour. A standard 4kW system usually takes one to two days for a two-person crew. Labour costs roughly £1,200–£2,000 for a straightforward install.
DNO notification. Your Distribution Network Operator needs to know about any new generation source on the grid. For systems up to 3.68kW it’s usually a simple notification (G98). Bigger systems may require a G99 application, which takes longer and costs more.
MCS certification. The Microgeneration Certification Scheme provides quality assurance and is a prerequisite for registering for Smart Export Guarantee payments. Your installer must be MCS-accredited. The certification process is typically built into their price.
VAT. Currently 0% on qualifying residential solar installations until 31 March 2027. Worth noting: if a quote comes through showing 20% VAT on a domestic solar install, query it.
Cost by solar system size
3kW system (7-8 panels)
Installed cost: £5,000–£7,000
The smaller end of the residential market. Suited to a one- or two-bedroom property, or a larger home where roof space is genuinely limited. Generates around 2,400–2,800 kWh per year in a typical UK location, which covers maybe 60–80% of a single person’s electricity use if they’re reasonably frugal.
The catch is that fixed costs (scaffolding, labour, inverter, DNO notification) don’t shrink proportionally. So the cost per kW installed is higher than a 4kW or 5kW system. If your roof can take more, it’s usually worth it to go bigger.
4kW system (10-12 panels)
Installed cost: £5,500–£8,500
The most common domestic system size in the UK and probably the right starting point for most three-bedroom households. Generates roughly 3,200–3,800 kWh per year, which covers a meaningful chunk of average UK household consumption.
MCS data puts the average installed cost for a 4kW system across the UK at around £7,500 as of early 2026, though this varies considerably by region. Wales tends to come in lower; London and the South East higher.
5kW system (13-15 panels)
Installed cost: £7,000–£9,500
Suits a three- to four-bedroom household with higher-than-average electricity use, or one planning to add an EV charger or heat pump soon. Generates 4,000–4,700 kWh annually. The additional cost over a 4kW system is relatively modest and often makes sense if roof space allows.
6kW and above (16-18+ panels)
Installed cost: £8,000–£11,000
For larger households, properties with high electricity consumption, or anyone sizing for a heat pump and EV simultaneously. Generates 4,800–5,600 kWh per year. Worth thinking carefully about whether your export tariff justifies the extra generation if you won’t self-consume it.
Bigger systems on larger or more complex roofs may require a G99 application to the DNO, which adds cost and lead time.
How much does a solar battery cost?
A home battery stores surplus solar generation during the day for use in the evening when import prices are highest. In theory, this improves your self-consumption rate and reduces grid dependency. In practice, the maths needs careful checking. If you’ve already decided storage is in scope, our best home batteries for solar guide compares Tesla, Fox ESS, Enphase and the budget alternatives.
Battery costs by capacity (supply and installation):
- 4–5kWh: £3,000–£5,000. Suits smaller systems or households with relatively modest evening loads.
- 8–10kWh: £5,000–£8,000. Covers most of an average household’s evening electricity use.
- 13kWh+: £8,000–£12,000. Whole-home backup territory; more relevant if you have a heat pump or EV charging evening loads.
Installing battery at the same time as panels is almost always cheaper than retrofitting later. The electrical work overlaps significantly, and labour costs are shared.
The honest question is whether the battery improves your payback or just inflates the bill. On a 4kW system generating around 3,600 kWh per year with 40% self-consumption, adding a 5kWh battery might increase annual savings from roughly £614 to around £796 — a difference of about £180 per year. At a battery cost of £4,000, the battery itself takes over 22 years to pay back. That’s longer than many battery warranties.
The economics improve significantly if you’re on a time-of-use import tariff with a meaningful overnight cheap rate, because you can charge the battery from the grid overnight and use it during expensive daytime periods. This is especially relevant for EV owners already on something like Octopus Intelligent, or for battery owners on a flux-style tariff that pays premium export rates during the evening peak. Our guide to Octopus SEG tariffs covers Flux and Intelligent Octopus Flux in detail.
For more on how export tariffs affect battery economics, see our best solar export tariff guide.
What affects the price of your quote
Two quotes for the same size system on two different houses can be £2,000–£3,000 apart. Here’s what drives that.
Roof pitch and orientation. A standard 30–40 degree pitched south-facing roof is the easiest case. Shallower, steeper, east/west-facing, or complex multi-plane roofs add mounting complexity and labour time.
Roof material. Standard concrete or clay tiles are straightforward. Natural slate requires more care (and often more time) to avoid breakage. Flat roofs need ballasted mounting frames, which add cost but avoid roof penetrations. In-roof systems (where panels replace tiles) cost more and are often the route for listed buildings or conservation areas.
Scaffolding. Single-storey properties often avoid scaffolding entirely. Two-storey houses with awkward access can add £600–£800 to the bill. Scaffolding that’s “included” in one quote might be charged separately in another. Ask explicitly.
DNO approval. For systems above 3.68kW per phase, a G99 application is typically required rather than a simple G98 notification. G99 can add several weeks and some additional cost. Most standard 4kW systems avoid this, but if you’re sizing up for a heat pump or EV, it becomes relevant.
Inverter choice. String inverters are the standard workaround and cheapest option. Optimisers can be added per panel if shading is an issue, typically adding £80–£150 per panel. Microinverters (one per panel) offer the most resilience and monitoring granularity but cost more overall. Hybrid inverters are battery-ready from the start and worth considering if you know you’ll add storage later.
Bird-proofing. Wire mesh skirting around the panel edges to prevent nesting underneath. Often an add-on, typically £200–£400.
MCS certification. Non-MCS installs are cheaper. They also make you ineligible for SEG export payments. Don’t go there.
Regional labour costs. A Midlands installer and a London installer charging similar day rates will still produce different quotes because access, parking, and overhead costs vary. Wales consistently shows lower average installed costs than England.
VAT, grants, and schemes that reduce the cost of solar
VAT
Since April 2022, domestic solar panels, battery storage, and associated equipment attract 0% VAT. This is applied automatically by your installer and represents a meaningful saving — on a £7,500 system, the difference between 0% and 20% VAT is £1,250. The 0% rate is currently confirmed until 31 March 2027.
ECO4 (England, Wales, Scotland — low-income households)
ECO4 has been extended to December 2026. It requires large energy suppliers to fund energy efficiency improvements for households on qualifying means-tested benefits (Universal Credit, Pension Credit, Income Support, Housing Benefit, Tax Credits) with an EPC rating of D or below. Solar panels are eligible, but only as part of a whole-house retrofit — you can’t claim solar as a standalone measure. The solar must accompany a compatible heating system (heat pump or electric heating).
If you think you qualify, apply now. The successor scheme (the Warm Homes Plan) exists in broad outline but has no confirmed solar-specific eligibility criteria yet.
Warm Homes: Local Grant (England)
A new scheme announced in January 2026, aimed at privately-owned or rented properties in England with EPC ratings of D–G. Funding of up to £15,000 is available through local authorities. Full details and application routes are still being confirmed. Worth checking with your local council.
Home Energy Scotland (Scotland)
Worth noting that the Home Energy Scotland solar PV grant and loan scheme closed to new solar applications in June 2024. As of 2026, HES no longer provides specific grants or interest-free loans for solar panels. Scottish homeowners can still access 0% VAT and ECO4, and if combining solar with a heat pump, the heat pump element may qualify for HES support (up to £7,500 grant). Worth calling HES directly on 0808 808 2282 to check your full picture.
NEST (Wales)
Welsh homeowners on lower incomes (household income under £38,456) with an EPC rating of E or lower may be eligible for funding through the Welsh Government’s NEST scheme. Solar panels can be included. Check eligibility via the Welsh Government.
For a full breakdown of cost-reduction routes, see our guide to how to reduce your energy bills.
Payback period: what the numbers actually look like
There is quite a lot of optimistic maths floating around on installer websites. Here’s a more honest version.
Scenario 1: 4kW system, no battery, south-facing Midlands roof
Using the Ofgem Q2 2026 cap rate of 24.67p/kWh and an SEG export rate of 12p/kWh:
- Annual generation: ~3,600 kWh
- Self-consumption at 40%: saves ~£355/year on imports
- Export income (60% exported): ~£259/year
- Total annual benefit: ~£614/year
- Installed cost: £6,500
- Payback: around 10–11 years
Scenario 2: Same system with 5kWh battery
- Self-consumption increases to ~80%
- Import savings: ~£710/year
- Export income (20% exported): ~£86/year
- Total annual benefit: ~£796/year
- Installed cost: £10,500 (adding £4,000 for battery)
- Payback: around 13 years
The battery extends payback by two to three years in this example. That’s not an argument against batteries, but it is an argument for being clear-eyed about why you want one. If energy independence matters to you, or you’re on a time-of-use tariff where overnight cheap rates change the maths, a battery can be worth it. If you’re purely optimising for financial payback, the case is thinner.
Southern England will see faster payback (7–10 years without battery) due to higher solar yield. Scotland takes longer (11–14 years) for the same reason in reverse.
One thing most payback calculators don’t mention: your inverter will probably need replacing at around 10–15 years. Budget £1,000–£1,500 for that. It doesn’t ruin the numbers but it’s worth factoring in.
Payback is not the same as return on investment. A 4kW system with a 10-year payback then generates annual savings for a further 15+ years of panel life, potentially adding up to £8,000–£15,000 net profit over 25 years at current electricity prices.
Step-by-step: how to get realistic solar quotes
1. Work out your annual electricity consumption. Look at your last 12 months of bills or your smart meter data. You’re looking for your total kWh consumed per year. The average UK household uses around 2,700–3,100 kWh per year. If you’re above that (EV, heat pump, high occupancy), you’ll want to size accordingly.
2. Check your roof suitability. South-facing is ideal, southwest is fine, southeast is workable. East and west-facing roofs will generate less. North-facing roofs are generally not worth it unless they’re very large and shading is minimal. Note any obvious shading from nearby trees or chimney stacks and flag it to installers. They should carry out a shading assessment.
3. Decide whether battery storage is in scope from day one. If you think you’ll want a battery eventually, it’s cheaper to wire for one during the initial install (even if you don’t buy the battery yet). Tell installers upfront. A hybrid inverter now costs more than a standard string inverter, but significantly less than retrofitting battery capability later.
4. Get at least three quotes from MCS-certified installers. Three quotes is the minimum sensible number. The spread between the highest and lowest for the same system specification is often £1,000–£2,500. MCS certification is non-negotiable if you want to register for SEG payments. You can check installer certification at the MCS website.
5. Compare on total installed cost, not just headline price. Ask each installer for the full system specification: panel brand and model, inverter brand and model, expected annual output in kWh, and what is explicitly excluded (scaffolding, DNO application, bird-proofing). This lets you compare like-for-like.
6. Ask about DNO status and inverter warranty. Specifically: has the installer already notified the DNO, or is that your responsibility? And what is the inverter warranty period? Panel warranties are typically 25 years for product and 10–12 years for performance. Inverter warranties are often only 5–10 years and vary significantly between brands.
7. Check installer reviews and trading history. Trustpilot, Google Reviews, and word of mouth from neighbours who’ve had systems installed all matter. How long has the company been trading? A cheap quote from a company that disappears in three years is a problem when your inverter warranty needs honouring.
Common pitfalls
Going with the cheapest quote without reading the detail. Low quotes sometimes exclude scaffolding, DNO application, or bird-proofing. Sometimes they use cheaper panels with shorter warranties. Sometimes the installer is not MCS-certified. Know what you’re comparing before choosing on price alone.
Assuming all quotes include scaffolding. Many don’t. It’s a common source of surprise costs. Ask explicitly whether scaffolding is included, and if so, whether the quote covers removal too.
Choosing a non-MCS installer. Yes, it might save a few hundred pounds upfront. You also lose eligibility for SEG payments entirely. On a 4kW system over 25 years, SEG income could total £3,000–£9,000 depending on rate and generation. That’s a lot to give up.
Oversizing the system when your consumption doesn’t justify it. If you’re exporting most of your generation at 12p/kWh because you’re at work all day and have no EV or battery, a 6kW system won’t payback significantly faster than a 4kW one. Match size to realistic self-consumption.
Being upsold a battery that stretches payback to 15+ years. Not all batteries make financial sense on every system. Run the numbers. If the battery’s standalone payback period exceeds its warranty length, you’re buying energy independence, not financial return. Both are legitimate reasons, but be clear about which one you’re choosing.
Ignoring inverter warranty length. Panel warranties run 25 years. Inverter warranties often run 5–10 years, with some manufacturers offering 10–12 years as an extended option. Factor in an inverter replacement cost of £1,000–£1,500 somewhere in your payback calculation.
Relying on installer projections that assume high electricity price inflation. Some payback calculations assume electricity prices rising 3–5% per year to make the numbers work. Run your own calculation at today’s prices for a conservative baseline.
Special cases
Households with heat pumps
If you have or are planning a heat pump, solar makes a lot of sense. Heat pumps increase your electricity consumption substantially, which means more of your solar generation gets self-consumed rather than exported at the lower SEG rate.
EV owners
An EV changes the solar maths meaningfully. If you can charge during the day when your panels are generating, you’re consuming electricity at 24p+ rather than exporting at 12–15p. That substantially improves the case for a larger system. Smart charging can be set to prioritise solar generation. Whether this also means you need a battery depends on your schedule. If you charge mainly during the day, you may not need one. See our guide to best ev tariffs for context on how EV tariffs interact with solar export.
Listed buildings and conservation areas
Solar panels are generally permitted development on residential buildings provided they don’t protrude more than 200mm above the roof plane, the building isn’t listed, and the property isn’t in a World Heritage Site. Listed buildings require listed building consent. Conservation areas may have restrictions. In these cases you’re often looking at in-roof systems (where panels replace tiles) rather than on-roof mounting, which significantly increases installation cost.
Flat roofs
Ballasted mounting systems (weighted frames that sit on the roof without penetrations) are the standard approach. They add cost — typically £500–£1,500 more than a standard pitched roof install — but avoid any questions about roof waterproofing integrity. Panels are usually angled at 10–15 degrees on a flat roof to optimise generation and allow self-cleaning.
Very small roofs
A 2kW system in 2026 costs around £3,500–£5,000 installed. The cost per kW is higher than larger systems because fixed costs don’t scale down. The SEG income is modest. If your roof can genuinely only fit four or five panels, it may be worth doing, but go in with realistic payback expectations — 13–16 years is not unusual for very small systems.
Off-grid and hybrid setups
Proper off-grid systems (where you’re not connected to the grid at all) have a completely different cost profile. You need much larger battery capacity, a capable hybrid inverter, and often a backup generator. These systems regularly cost £20,000–£40,000 or more for a typical home. This guide doesn’t cover them in detail, but they’re worth flagging as a distinct category. Don’t confuse “battery storage with solar” (which is what most people mean) with a genuine off-grid setup.
FAQ
How much do solar panels cost for a typical UK home in 2026?
A standard 4kW system for a three-bedroom home costs roughly £5,500–£8,500 installed, or £10,000–£14,000 with a 10kWh battery. MCS data puts the national average installed cost across all system sizes at around £7,500 as of early 2026.
Is it cheaper to add a battery at the same time as panels?
Yes, almost always. The electrical work overlaps significantly and installers don’t have to come back for a second visit. If you think you’ll want a battery within a few years, a battery-ready (hybrid) inverter from day one is worth the premium even if you wait on the battery itself.
Do I still pay 0% VAT on solar panels?
Yes. The 0% VAT rate on domestic solar panels, battery storage, and associated equipment is confirmed until 31 March 2027. It is applied automatically by your installer.
What’s the payback period for solar panels in the UK right now?
For a south-facing 4kW system without battery in the Midlands, around 10–11 years at current electricity prices. Southern England comes in at 7–10 years; Scotland at 11–14 years. Adding a battery typically extends payback by two to three years.
Are solar panels worth it in 2026?
For most south or south-west facing roofs in England and Wales, yes, provided you’re realistic about payback periods and don’t buy a battery that doesn’t stack up financially for your usage pattern. For complex or shaded roofs, or north-facing roofs in Scotland, the case is thinner.
Can I get a grant toward solar panels?
In England, there is no universal solar grant. ECO4 covers qualifying low-income households until December 2026, but only as part of a whole-house retrofit. The new Warm Homes: Local Grant offers up to £15,000 for eligible lower-EPC properties. In Scotland, Home Energy Scotland no longer provides specific solar grants as of 2024, though ECO4 still applies. In Wales, the NEST scheme is available for lower-income households. 0% VAT applies everywhere in Great Britain.
How much does a 4kW system cost installed?
Typically £5,500–£8,500 in 2026. The national average across MCS-certified installs is around £7,500. Factors including roof type, scaffolding requirements, inverter choice, and region all move the number. If a quote comes in significantly above £2,200 per kWp for a straightforward install, ask detailed questions.
Conclusion
If you have a south- or south-west-facing roof and average to above-average electricity consumption, solar is a reasonable financial decision in 2026. Not a slam-dunk, not a no-brainer, but a solid one with realistic payback timescales.
If your roof faces north or is heavily shaded, or you’re in northern Scotland and primarily thinking about financial return, run the numbers carefully before committing. The headline figures won’t apply to your situation.
If you have a heat pump or EV already (or both), solar is probably among the better investments you can make on your home right now. The self-consumption rate will be high and the system will pay for itself meaningfully faster than for a household that exports the majority of its generation.
If you’re on a tight budget, a smaller 3kW system is a legitimate option, but check the cost per kW carefully. Sometimes the jump to 4kW adds very little to the total and brings much better unit economics.
If you’re seriously weighing solar against a heat pump, our Solar Panels vs Heat Pumps guide covers that comparison directly.
The next step for most people is getting quotes. Three from MCS-certified installers is the standard minimum.
Prices, VAT treatment, and grant schemes all change. The figures in this guide reflect the market as of April 2026. Always verify current pricing through quotes rather than relying on a guide figure.
