Solar panels for a typical UK home cost between £5,000 and £9,000 depending on system size, panel type, and installer. You won't find a direct government grant to buy them outright, but ECO4 can fund the full installation for eligible households, and everyone gets 0% VAT. Most systems pay for themselves within 8 to 12 years through bill savings and export payments.
How Much Do Solar Panels Cost to Buy in 2026?
£5,000 to £9,000. That's the range for a standard residential system including installation, scaffolding, and the inverter.
The price depends mostly on system size, which is measured in kilowatts peak (kWp). A 3kWp system suits a small terrace or flat-roofed bungalow. A 5kWp or 6kWp system makes more sense for a detached house with higher electricity use. Here's roughly what you're looking at:
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Those figures include VAT at 0%, which has applied to domestic solar installations since 2022 and runs until at least 31 March 2027. Before that relief, you'd add 20% on top, so enjoy it while it lasts.
We've covered the full breakdown of what drives these numbers in our solar panel costs guide, but the short version is: panel brand matters less than you'd think, inverter quality matters more than most people realise, and scaffolding costs vary wildly depending on your roof access. A three-storey Victorian terrace in London might pay £800 just for scaffolding. A single-storey bungalow in Norfolk might pay nothing.
One thing that catches people out: the "per panel" prices you see advertised online rarely include installation. A panel itself might cost £150 to £350 depending on wattage and brand, but that's meaningless without the labour, mounting hardware, inverter, and electrical work.
What Types of Solar Panels Are Available in the UK?
Three types dominate the residential market, but honestly, for most homes it comes down to two.
Monocrystalline panels are what you'll find on about 80% of new UK installations. They're the black or dark blue panels with uniform cells, they perform best in limited roof space because they're the most efficient per square metre (typically 20–22% efficiency), and they've dropped in price enough that there's rarely a reason to go cheaper. If someone quotes you monocrystalline panels from a brand like JA Solar, Trina, or LONGi, you're in solid territory.
Polycrystalline panels are the older technology with a slightly bluish, speckled look. They're 2–3% less efficient and marginally cheaper. But here's the thing: the price gap has narrowed so much that most MCS-certified installers don't even stock them anymore. If you're quoted polycrystalline in 2026, ask why.
Thin-film panels exist but you'll almost never see them on a UK roof. They're for commercial buildings, curved surfaces, or situations where weight is a concern. Unless your installer specifically recommends them for your property's unusual characteristics, ignore them.
So the real question isn't "which type" but rather which wattage per panel. Panels now range from about 370W to 440W each. Higher wattage means fewer panels for the same output, which matters if your roof space is tight. A 6kWp system using 440W panels needs only 14 panels instead of 16 with 370W panels. That's meaningful on a hipped roof where every square metre counts.
Can You Get a Grant to Help Pay for Solar Panels?
Right, so here's the honest bit. There's no universal solar panel grant in the UK. The government doesn't hand out £5,000 vouchers for anyone who fancies going solar. But there are schemes that can dramatically reduce or eliminate the cost for specific groups.
ECO4 is the big one. If your household receives qualifying benefits like Universal Credit, Pension Credit, Child Tax Credit, or Income Support, and your home has an EPC rating of D or below, ECO4 can fund the entire installation at no cost to you. We've written a full breakdown of solar panel grants covering exactly who qualifies and how to apply. The scheme runs until December 2026, so the window is narrowing.
The Warm Homes: Local Grant is the other route. This is administered by local authorities rather than energy suppliers, and funding varies hugely by council. Some areas prioritise insulation, others include solar. Check whether your council is participating through our Warm Homes Local Grant guide.
For everyone else, the financial help comes in two forms. Zero VAT saves you roughly £1,000 to £1,500 on a typical system. And the Smart Export Guarantee pays you for surplus electricity you send back to the grid. Octopus Energy currently offers around 15p/kWh on their Flux tariff. British Gas pays about 12p. Some smaller suppliers offer less.
The Great British Insulation Scheme, which closed in March 2026, didn't cover solar panels anyway, so its closure doesn't affect your options here.
Buying vs Leasing Solar Panels: Which Is Better for You?
Buy them. That's our position for the vast majority of homeowners.
Leasing (sometimes called "rent-a-roof" or solar PPA agreements) means a company installs panels on your roof for free, sells you the electricity at a discounted rate, and keeps the export payments. You save something on bills, but you don't own the system, you can't claim the export income, and it complicates selling your house because the lease transfers to the buyer.
We saw a wave of these schemes between 2010 and 2016 when panels were expensive and the Feed-in Tariff made them attractive for investors. Now that panel prices have fallen by roughly 60% since then, the economics have flipped entirely in favour of ownership.
The numbers are simple. Buy a 4kWp system for £6,500. Save £800 to £1,000 a year on electricity plus £100 to £200 in export payments. The system pays for itself in under 8 years and then generates pure profit for another 17+ years. With a lease, you save maybe £200 a year and never build any equity.
The only scenario where leasing makes sense: you genuinely cannot afford the upfront cost, you don't qualify for ECO4, and you can't or won't take a green loan. Even then, check whether a 0% interest credit card for the deposit plus a short-term loan works out better over 5 years. It usually does.
Anyway. If you're considering adding solar battery storage later, owning your panels is basically non-negotiable because most lease agreements restrict what you can add to the system.
What to Look for When Comparing Solar Panel Quotes
So you've decided to buy. You'll get three quotes (minimum, always), and they'll look confusingly different. Here's what actually matters.
MCS certification. Non-negotiable. If the installer isn't MCS-certified, you won't qualify for the Smart Export Guarantee, you won't get the 0% VAT rate, and your installation won't meet building regulations. Walk away from anyone who isn't certified, regardless of how cheap they are.
The inverter brand and type matters more than the panel brand. Your inverter converts DC electricity from the panels into AC electricity your home uses. A cheap inverter fails after 5–7 years and costs £1,000+ to replace. A quality one (SolarEdge, Enphase, GivEnergy, Huawei) lasts 12–15 years with a matching warranty. Some installers pad margins by using premium panels with budget inverters. Don't let them.
Check what's included in the quoted price:
Scaffolding (some quote it separately)
DNO notification (legally required, should be included)
MCS registration
Roof condition assessment
Generation meter
Smart Export Guarantee signup assistance
And here's something most guides won't tell you: the "estimated annual generation" figure on your quote is probably optimistic. Installers typically quote generation based on a south-facing roof at 30–35° pitch with no shading. If your roof faces east-west, expect 15–20% less. If you've got a chimney casting afternoon shadow across three panels, expect more loss than that. Ask for a shade analysis, ideally using software like PVsol or similar, not just a visual estimate from the ground.
One more thing. Get the warranty details in writing before you sign. Panel performance warranties should be 25 years. Inverter warranties should be at least 10 years (some offer 15 or 25 with microinverters). Workmanship warranty from the installer should be minimum 5 years, ideally 10.
How Long Before Solar Panels Pay for Themselves?
8 to 12 years for most UK homes. That's the honest range.
The exact payback depends on five things: what you paid, how much electricity you use during daylight hours, your export tariff rate, how much electricity costs from the grid, and how much sun your roof actually gets.
Let's run a realistic example. A 4kWp system in the Midlands, south-facing roof, installed for £6,500. It generates roughly 3,400 kWh per year. If you use 50% of that directly (saving you around 24p/kWh at current rates) and export the other 50% at 15p/kWh, your annual benefit looks like this:
But shift more consumption to daylight hours (run the washing machine, dishwasher, and car charger during the day) and that self-consumption figure jumps to 70%. Now you're saving £815 a year and paying the system off in 8 years. Add a battery and you can push self-consumption above 85%, though the battery adds £3,000–£5,000 to the upfront cost and extends payback slightly.
Honestly, the payback calculation also depends on what happens to electricity prices. If they rise 5% a year (which is conservative given the last decade), your panels become more valuable every year. If prices somehow fall, the payback stretches. Nobody knows for certain. But the trend has been relentlessly upward.
After payback, a well-maintained system generates £600 to £1,000 of value per year for another 15+ years. That's £9,000 to £15,000 of pure benefit over the system's lifetime. Our full analysis on whether solar panels are worth it breaks this down with different scenarios.
One final thought: keeping your panels clean matters more than people think, especially if you're near trees or a main road. A dirty panel can lose 5–10% of its output, which over 25 years adds up to hundreds of pounds in lost generation.
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Grant amounts and eligibility criteria are based on publicly available government data and may change. Always verify current terms directly with the scheme provider.
Frequently asked questions
Can I buy solar panels without installation?
Technically yes, you can buy panels from wholesalers or online retailers. But you'd still need an MCS-certified electrician to install them, and buying separately almost never saves money because installers get trade pricing on panels. You'd also void any workmanship warranty and potentially invalidate your home insurance if the installation isn't professionally certified. It's not worth the hassle.
Do solar panels increase my home's value?
Yes, typically by 1–3% according to estate agent estimates, though hard data is limited in the UK. Owned systems add value. Leased systems can actually make your home harder to sell because the buyer has to agree to take over the lease contract.
What happens if I move house after installing solar panels?
The panels stay with the property and transfer to the new owner. This is actually a selling point. Your Smart Export Guarantee contract may need to be transferred or a new one set up by the buyer, but that's a quick process. If you funded the panels through ECO4, there's no clawback or repayment required.
How long do solar panels actually last?
25 to 30 years minimum. Most manufacturers guarantee at least 80% of original output at the 25-year mark, and real-world data from early UK installations shows many systems still performing above that threshold after 30 years. The inverter will likely need replacing once during that period (around year 12–15), which costs £800 to £1,500.
Do I need planning permission for solar panels?
Almost certainly not. Solar panels fall under permitted development rights for most homes in England and Wales, meaning no planning application needed. The exceptions: listed buildings, conservation areas (sometimes), and installations that protrude more than 200mm from the roof surface. If you live in Scotland or Northern Ireland, rules differ slightly. Check with your local planning authority if you're unsure.