How much does solar panel installation cost in the UK?
Real 2026 prices by system size, what actually moves a quote by thousands of pounds, and the honest payback picture.
Quick answer
A typical UK home solar installation costs £5,500–£8,000 for a 3.5–4 kWp system fully installed, as at spring 2026. The MCS-reported England average is roughly £1,565–£1,590 per kW. Prices currently include 0% VAT on domestic installations (until 31 March 2027). Bigger systems cost more but less per kW; batteries add £2,500–£7,000. Regional labour moves prices 10–15% either side of the average.
Installation costs by system size (2026)
These are fully-installed prices — panels, inverter, mounting, scaffolding and the electrical work — for a straightforward pitched-roof installation. They carry the current 0% VAT rate for domestic energy-saving installations, which runs to 31 March 2027.
| System | Panels | Installed cost (inc 0% VAT) | Typical annual saving | Simple payback |
|---|---|---|---|---|
| 3 kWp | 7–8 | £4,500–£6,500 | £450–£650 | 8–11 yrs |
| 4 kWp | 9–10 | £5,500–£8,000 | £600–£900 | 7–9 yrs |
| 6 kWp | 13–15 | £7,500–£11,000 | £900–£1,300 | 6–8 yrs |
| 4.4 kWp + 9.5 kWh battery | 10 | £9,000–£15,500 | £1,050–£1,250 | 8–10 yrs |
Savings assume typical consumption patterns and current tariffs; payback is simple payback before any panel-price or tariff movement. With 440–475 W panels now standard, you need fewer panels than older guides suggest.
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Pick a job for an instant guide price from our published price list. It's indicative only — every job is confirmed with a free written quote.
Typical guide price
£4,500–£6,500installed, incl. 0% VAT
Typical time on site: 1 day on the roof
Guide range based on current market rates. Your price is confirmed in a free written quote after we understand the specifics.
Get my fixed written quoteWhat actually moves a solar quote by thousands
Two quotes for the same roof can differ by £3,000 and both be "correct" — they're pricing different jobs. Four lines explain most of the gap. Scaffolding is £600–£1,200 of a domestic quote and some cheap quotes quietly exclude it. Inverter class — a budget string inverter versus a hybrid that's battery-ready — is several hundred pounds and determines your upgrade path. Paperwork handling: whether the installer runs the DNO application, MCS registration and building-control notification for you, or leaves you to discover what's missing at house sale. And roof type: slate costs more labour than concrete tile, in-roof systems add trays and flashing, and flat roofs need ballast engineering. Ask every quoter to itemise those four lines and the mystery usually disappears.
Payback honestly: the range, and when it's slower
| Situation | Typical simple payback | Why |
|---|---|---|
| Home all day, south-facing roof, battery | 6–8 years | High self-consumption — most generated units replace 26p imports |
| Typical household, east-west roof | 7–10 years | Generation spread across the day matches usage better than a midday peak |
| Out all day, no battery, heavy shading | 12–15+ years | Most units exported at the SEG rate instead of used — we'll say so at survey rather than oversell |
The self-consumption ladder: why a used unit beats an exported one
Every kWh your panels generate goes one of two ways. Used on site, it replaces a unit you'd have bought at your import price — roughly 26p. Exported, it earns your Smart Export Guarantee rate — roughly 12–16p on the better tariffs as at mid-2026 (rates move on ~30 days' notice; always check the live rate before choosing a supplier). That two-to-one gap is why self-consumption drives payback, and why the design decisions — battery, east-west split, diverting surplus to hot water — matter more than squeezing the hardware price. Your MCS certificate is the gateway: without it, no SEG registration at all. You don't have to export to the supplier you import from — shop the rate.
Ways to pay for an installation
Cash purchase
The simplest route and the strongest return — no interest, and the 0% VAT window (to 31 March 2027) applies. Every £1 of saving is yours from day one.
Green loans and 0% offers
Several lenders offer green home-improvement borrowing; structured well, monthly repayments can sit at or below the energy saving. Any credit offer should show a representative APR and the total repayable — walk away from one that doesn't.
Businesses: Annual Investment Allowance
Commercial installations qualify for 100% first-year relief via the AIA (solar is special-rate expenditure, so AIA — not full expensing — is the correct route). Confirm treatment with your accountant.
"Is it actually worth it at these prices?"
For most owned homes with a reasonable roof — yes, and here's the shape of it
A 4 kWp system at £6,500 saving £750 a year pays back in under 9 years and is warranted for 25. The return isn't the question for most homes — the installation quality and the design (battery, orientation, self-consumption) are what decide whether you land at the good end of the range. The full honest treatment, including when the answer is no, is on is solar worth it?
When is it NOT worth it?
A north-only pitch, heavy permanent shading, a roof needing replacement within ten years (fix that first — or make it an in-roof install at re-roof time), or a home you're leaving within a couple of years. We'd rather tell you at survey than sell you a 15-year payback.
Why not just take the cheapest quote?
Because the cheap quote is usually pricing a different job: no scaffold line, a budget inverter, no G99 handling, anchors fixed to whatever's nearest. The £1,000 saved up front is the £1,000 that decides whether the system performs for 25 years. Itemise, then compare.
The two dates that genuinely matter
We don't do countdown gimmicks, but two sourced dates are real: 0% VAT on domestic solar and battery installation ends 31 March 2027 (it reverts to 5% — VAT Notice 708/6), and since 27 August 2026 the permitted development rules for house solar have been more generous (SI 2026/896). Neither is a countdown pitch; both are simply worth knowing when you plan. Funding routes in full on grants and funding.
Get a fixed, itemised installation price
Responds within one working day
- 1. A named surveyor reviews your roof and consumption, no obligation.
- 2. A fixed-price written proposal with the planning position confirmed.
- 3. Install, commissioning and the full handover pack — MCS certificate, EIC, DNO evidence, warranties.
- MCS Certified
- NICEIC
- RECC
- TrustMark
Cost questions, answered straight
Is scaffolding always needed - and why is it so expensive?
Almost always, yes. Working-at-height law makes roof work from ladders indefensible for a crew installing panels, so a scaffold (or occasionally a tower/edge-protection system on easy single-storey roofs) goes up first. It is typically GBP 600-1,200 of a domestic quote - a real cost from a separate trade, and one of the main reasons quotes differ. If a quote is suspiciously cheap, check whether scaffolding is actually in it.
How much does solar panel installation cost in 2026?
MCS-reported installation data puts the England average around GBP 1,565-1,590 per kW as of spring 2026. In system terms: a typical 3.5 kWp installation lands about GBP 5,500-8,000 fully installed, a 5-6 kWp system roughly GBP 7,500-11,000, with 0% VAT currently applying to domestic installs (until 31 March 2027). Batteries add roughly GBP 2,500-7,000 depending on capacity and coupling. Regional labour costs move prices 10-15% either side of the average.
What size solar system do I need?
Start from your annual consumption, not your roof. A home using around 3,500-4,500 kWh a year with some daytime occupancy is usually well served by 3.5-5 kWp; add an EV or heat pump and 6-8 kWp with a battery starts to justify itself. With 440-475 W panels now standard, that is fewer panels than older guides suggest - 8 to 14 covers most homes. The design question an installer should ask first is when you use electricity, because self-consumption drives the payback.