Solar Panels Cost UK – 2026 Price Guide
How much do solar panels actually cost in the UK in 2026? This guide uses live pricing data from 519 UK towns to show realistic figures for 4kW, 6kW and 10kW systems, battery storage add-ons, payback periods, and what the 0% VAT and Smart Export Guarantee mean for your bill. Because the gap between a small array and a large one is so wide, it pays to match the system to your roof and your actual consumption rather than a headline figure; our breakdown of solar panel costs by system size sets the 4kW, 6kW and 10kW options side by side so you can see where the money goes before you request quotes.
Do you need planning permission for this?
Most domestic solar PV installations are Permitted Development under MCS standards. Listed buildings, conservation areas, and ground-mounted arrays >9m² have stricter rules. DNO notification still required for all installs.
Read the solar panel planning rules →Solar Installation Cost at a Glance
Real cost ranges for MCS-certified solar PV installations in the UK, drawn from BestBuilders platform data and cross-referenced with the MCS Installer Database. Use these as starting benchmarks — then get 3 local quotes for your specific roof.
Around 10 panels. Covers ~60% of a typical 1–2 bed household's daytime electricity use. 1–2 days to install.
Get quotes →Around 14–16 panels. Most popular size for UK 3-bed semis. Typically generates £650–£900/year in savings + export payments.
Get quotes →Around 24 panels. Needs a large south-facing roof. Usually paired with battery storage. Payback in 7–10 years for high users.
Get quotes →Panel count depends on roof size, pitch and orientation. The only accurate price is from an installer who's surveyed your roof.
Get free quotes →Solar PV Cost Per kW (UK 2026)
| System Size | Panels | Installed Cost | £/kW Installed |
|---|---|---|---|
| 3 kW | ~7 panels | £4,500 – £6,500 | ~£1,800/kW |
| 4 kW | ~10 panels | £5,500 – £7,500 | ~£1,625/kW |
| 5 kW | ~12 panels | £6,800 – £9,500 | ~£1,630/kW |
| 6 kW | ~14–16 panels | £8,000 – £11,500 | ~£1,625/kW |
| 8 kW | ~20 panels | £11,000 – £15,500 | ~£1,656/kW |
| 10 kW | ~24 panels | £14,000 – £19,500 | ~£1,675/kW |
All figures are fully installed including scaffolding, inverter, MCS certification and 0% VAT (residential installs are zero-rated until 2027). Battery storage not included.
What's Included in a Solar Installation
A typical 6kW UK installation breaks down roughly as follows. Panels are only ~35% of the total — labour, inverter and certification costs are where the rest goes.
Hardware (~60%)
- Solar panels — £2,800–£4,500 (14–16 × ~£200–£280 per panel for Tier 1 mono PERC)
- Inverter — £700–£1,800 (string inverter cheapest; hybrid/battery-ready more)
- Mounting & rails — £400–£650 (roof-specific hooks and aluminium rails)
- DC & AC cabling, isolators — £350–£550
- Generation meter — £100–£200
Labour & Services (~40%)
- Installer labour — £1,500–£2,400 (2 MCS electricians, 1–2 days)
- Scaffolding — £450–£900 (1-week hire, 2-storey semi; more for detached)
- DNO notification + MCS cert — £150–£350 (admin, site paperwork)
- Roof survey + design — £0–£250 (usually included in quote)
- Scaffold collection + commissioning — £150–£300
Battery Storage — Worth It?
A home battery lets you store daytime solar generation for use in the evening (when you'd otherwise import from the grid). In 2026 the maths have improved significantly as battery prices have fallen and import tariffs stayed high. Storage stacks up even better if you are electrifying other parts of the home: the case for a battery strengthens alongside an air source heat pump or an EV charger, because more of your daytime generation gets used on site instead of being exported at a lower rate.
Covers evening use for small households. Typical brands: GivEnergy, PowerVault entry-tier.
Covers a typical 3-bed's evening + overnight demand. Common with 6kW PV systems.
For heat pumps, EV charging, or families heavily time-shifting usage. Paired with 8–10kW PV.
Integrated inverter, app monitoring, high continuous power. Premium brand premium.
Battery ROI quick rule of thumb (2026)
A 10kWh battery typically saves £300–£600/year vs solar-only, depending on your import tariff and usage pattern. At £5,000 installed that's an 8–15 year simple payback — comparable to the warranty (10 years typical). Worth it if your import tariff is high (>30p/kWh) or you're on a time-of-use plan like Octopus Agile. Less compelling if you're home during the day or on a low fixed tariff.
How Long to Break Even?
At 2026 UK import tariffs (~27p/kWh) and the 15p Smart Export Guarantee average, most residential solar systems pay back in 8–12 years — earlier if your energy use is high, later if you're home less during the day.
Assumes 850 kWh generated per 1kW installed per year (UK average, tilts and orientations), 40–60% self-consumption, 27p/kWh import tariff, 15p/kWh SEG export rate. Panels typically retain 85%+ of capacity after 25 years.
Grants, VAT & the Smart Export Guarantee
There is no direct UK grant for solar PV in 2026 — but three policies significantly improve the numbers. If you want the current position on funding and who qualifies before you plan around it, see our dedicated guide to solar panel grants in the UK alongside the export and VAT points set out below.
Residential solar PV, battery storage and heat pumps are zero-rated for VAT in the UK. Saves £1,000–£2,500 on a typical installation vs the previous 5% rate.
All energy suppliers with 150,000+ customers must offer payment for exported solar. Tariffs vary from 4p/kWh (British Gas fixed) to 27p/kWh (Octopus Outgoing Agile peak). Shop around.
If you receive qualifying benefits and live in an EPC D–G home, ECO4 can fund solar + battery installations. Typical grant value £5,000–£12,000. Full guide →
Solar Cost by UK Region (6 kW System, 2026)
Solar has less regional pricing variation than other trades — most panels and inverters are nationally priced — but labour, scaffolding and installer availability do move the total.
Solar Panel Costs at a Glance: 2026 Visual Guide
System size is the single biggest price lever — and the economics improve as you scale up. Our platform data across 519 UK towns shows a 3 kW array costing around £1,800 per kilowatt installed, falling to roughly £1,625/kW from 4 kW upwards. The 4 kW system, at £5,500–£7,500 fitted, remains the sweet spot for a typical UK semi: around ten panels and one to two days on site.
A fair solar quote is far more than panels on a roof. Panels account for only around 35% of a typical 6 kW installation — the rest goes on the inverter, mounting hardware, cabling, labour and MCS paperwork. The diagram below shows every physical part of a compliant installation, and the strip beneath lists the services a genuine MCS installed price already covers, so you can spot a stripped-down quote instantly.
Payback is the number most buyers actually care about. A typical 4 kW system at the £6,500 midpoint returns £550–£800 a year in bill savings plus Smart Export Guarantee income at 2026 tariffs (~27p/kWh import, 15p/kWh export). Cumulative benefit overtakes the upfront cost between years 8 and 11 — and with panels retaining 85%+ of output after 25 years, everything beyond break-even is effectively free electricity.
Common Questions About Solar Panel Costs
It depends on roof space and energy use, but typical UK households need: 7–10 panels for a small household (under 3,000 kWh/year use), 12–16 panels for a typical 3-bed (3,000–5,000 kWh/year), and 20+ panels for high users with heat pumps or EVs. A south-facing roof pitched 30–40° is ideal but east/west orientations still work at ~85% efficiency.
In most cases no — solar PV is Permitted Development in England, Wales and Scotland. Restrictions apply if you're in a conservation area (panels can't be on walls facing a road), a listed building (full planning consent required), or if panels protrude more than 20cm from the roof surface. Always check with your local authority before installing.
Often yes. SEG tariffs range from 4p/kWh (British Gas fixed) to 27p/kWh (Octopus Outgoing Agile at peak). A typical 6kW system exports around 2,000–3,000 kWh/year, so the difference between cheapest and best tariffs is £460–£690/year. You don't have to use the same supplier for import and export — shop both separately.
MCS-certified installers use roof hooks that tuck under existing tiles and bolt into rafters — they don't penetrate the waterproof membrane in a way that typically causes leaks. Reputable installers provide a workmanship warranty of 5–10 years and panels themselves have product warranties of 15–25 years. If your roof is near end-of-life (>25 years old), consider re-roofing first or do it at the same time.
Yes, comfortably. Tier-1 monocrystalline panels typically retain 85–90% of their capacity after 25 years and routinely last 30+. A UK system paying back in 10 years will deliver 15+ years of free electricity after that. The biggest risk isn't panel failure but inverter replacement at year 10–15 (£700–£1,800 to replace).
Financially, doing both at the same time saves ~£500–£1,000 on combined labour and scaffolding. But if the battery economics don't work for you yet (low import tariff, home during the day), you can always add a battery later using a hybrid-capable or battery-ready inverter. Ask your installer to specify a hybrid inverter from day one for future flexibility.
Quality of panels (Tier-1 vs Tier-3 generics), inverter brand (Fronius, SMA, GivEnergy vs no-name), installer certification (MCS-registered vs not), length of workmanship warranty, and whether scaffolding and DNO notification are itemised properly. Rock-bottom quotes often cut corners on two or three of these. We strongly recommend 3 MCS-certified quotes for comparison.
Solar Panel Costs by Town
Each town page shows local vetted solar installers, town-specific cost ranges, recent project examples and nearby areas. Compare 3 free quotes from vetted solar installers.
Solar panel brands compared: JA Solar, LONGi, Trina, Aiko, REC and Q CELLS
Almost every UK install now uses a black-framed monocrystalline panel of 400–450W. What separates the brands is efficiency per square metre, warranty length and how the panel behaves when part of the roof is shaded.
| Brand | Known for | Ranges you will be quoted | Typical price per panel | Worth knowing |
|---|---|---|---|---|
| Aiko | Newer to the UK; high efficiency per m² | Neostar 2S, ABC series | £130–£200 | Useful where roof space is the limit rather than budget |
| JA Solar | High volume, competitive pricing | DeepBlue 4.0, JAM54 | £90–£150 | A common default on UK quotes; good output per pound |
| LONGi | One of the largest makers worldwide | Hi-MO 6, Hi-MO X6 | £100–£160 | Strong efficiency figures for a mainstream price |
| Q CELLS | German-engineered, strong low-light performance | Q.PEAK DUO, Q.TRON | £120–£190 | Often chosen for consistency on partly shaded UK roofs |
| REC | Premium; long product warranty | Alpha Pure-RX | £180–£260 | Costs more per panel but carries one of the longer warranties |
| Trina Solar | Long-established, widely stocked | Vertex S+ | £95–£155 | Vertex S+ is the smaller-format panel that suits awkward roofs |
Prices above are for the panel only — fitting is separate and is priced in the table further up this page. Brands are listed alphabetically, not ranked: BestBuilders does not sell or endorse any of them.
Get Accurate Quotes for Your Solar Panel Installation
Online guides give you a benchmark — but accurate pricing requires an installer who has surveyed your roof orientation, pitch and shading and sized the system to your annual usage. BestBuilders matches you with up to 3 vetted solar installers for free.
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Related cost guides
Solar panels — guides and detail
The detail behind the number: what changes the price, the planning position, and how to check a quote before you accept it.
Grants, 0% VAT and Planning in 2026
Two things quietly improve the payback on a 2026 solar install. First, installing solar panels and home battery storage on residential property is zero-rated for VAT until 31 March 2027, after which the rate is set to return to 5% — so there is a real saving in fitting before the deadline. Second, most homes export surplus power under the Smart Export Guarantee, which obliges licensed suppliers to pay for the electricity you send back to the grid; rates vary by supplier and tariff, so it is worth comparing export rates, not just install prices.
Planning permission is rarely needed: roof-mounted domestic solar is permitted development in most cases, provided the panels do not project more than 200mm from the roof slope and the property is not listed. Conservation areas, and larger ground-mounted arrays, are the main exceptions. Check the position for your property in our solar panel planning guide before you commit.
Registered members: Solar & Battery
3 businesses offering solar & battery have a public profile with BestBuilders. Each listing is a business that registered with us directly; the details shown are the ones it declared at registration, and a Companies House number appears only where one was given.
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