UK Solar Panels Guide

Solar Panels UK Homes

Everything you need to know about solar panels in the UK: costs, savings, grants, and how to find a trusted installer.

£6,500–£8,000
Typical 4kW system, fitted
About £690
Yearly saving, 4kW with export
9–12 years
Payback (Energy Saving Trust)
0% VAT
Until 31 March 2027
25+ years
Typical panel lifespan

Are Solar Panels Worth It in the UK?

The short answer, for most UK homeowners with a suitable roof: yes. Electricity costs remain high (26.32p/kWh under the October to December 2026 price cap, with a rise forecast for January), and the combination of 0% VAT on qualifying installations and Smart Export Guarantee payments makes the financial case stronger than it's been for years.

That said, solar panels aren't right for everyone. A north-facing roof, heavy shading, or plans to move soon all affect whether you'll see a good return. This guide covers everything you need to make an informed decision, without the sales pitch. Before you sign anything, read our 8 things to know before installing solar panels.

Quick verdict: A typical 4kW solar system costs £6,500–£8,000 fitted. On our calculator's assumptions it saves about £690 a year including export payments, and the Energy Saving Trust puts payback at 9 to 12 years. Panels last 25 years or more, though the inverter usually needs replacing once, after about 12 years.

Thinking about solar?

Get free quotes from MCS-certified installers and compare system sizes, prices and warranties.

Get Free Quotes →
Aerial view of solar panels installed on a UK detached house roof in a suburban neighbourhood
A typical UK detached home with a south-facing 4kW solar panel system, a common size for a 3 to 4 bed house

Last reviewed: 21 October 2026. Costs from the Energy Saving Trust and Heatable's October 2026 price survey, solar output from the EU's PVGIS tool, savings from our calculator's assumptions. Your costs and savings will depend on your property, system size, usage, tariff, export rate and installer.

Solar Panels UK Costs 2026

Typical fitted prices in 2026. For the full breakdown, including batteries, scaffolding and what pushes a quote up, see our solar panel cost guide.

System Size Best For Typical Cost Est. yearly saving*
3kW Small homes, flats £5,000–£6,500 About £510
4kW 2 to 3 bed homes £6,500–£8,000 About £690
5kW 3 to 4 bed homes £8,000–£10,000 About £860
4.5kW (UK average) About 12 panels About £7,600 About £770

Prices for 3 to 5kW from Heatable's October 2026 price guide, the 4.5kW average from the Energy Saving Trust. *Savings use our calculator's assumptions: a south-facing roof in the Midlands, 40% of output used at home at 26.32p/kWh and the rest exported at 12p/kWh.

What pushes the price up

  • Complex or flat roof
  • Premium panel brands
  • Adding battery storage
  • Remote location
  • Roof repairs needed first

What brings the price down

  • 0% VAT until 31 March 2027
  • Simple pitched roof
  • ECO4 grant (if eligible)
  • Getting multiple quotes
  • South-facing roof

Want your exact numbers rather than these averages?

Use our free solar savings calculator: enter your roof direction, system size and bill to get a personalised estimate.

Important: Always get at least 3 quotes. Prices vary significantly between installers for identical systems. Use an MCS-certified installer, as MCS certification is required to access Smart Export Guarantee payments, and most reputable installers hold it as standard.

Solar panels shaped as a pound sign on a UK roof representing solar panel savings
With current electricity prices, the financial case for solar remains strong for most UK homes

How Much Could You Save?

Solar savings come from two sources: electricity you don't have to buy, and electricity you sell back to the grid.

About £400
Off your bills each year (4kW, 40% used at home)
£
About £275
Yearly export earnings at 12p/kWh

The Smart Export Guarantee (SEG)

The SEG pays you for every unit of electricity you export back to the grid, but the rate depends heavily on who you buy from. Most suppliers run three tiers: around 4–6p/kWh open to anyone, around 12p if they also supply your electricity, and 15–25p only if you bought your solar or battery system through them. Your installation needs to be MCS-certified to get paid. We checked every supplier's rate in our best solar export tariffs guide.

Tips to get more from your panels

  • Run appliances during daylight hours to maximise self-consumption
  • Add battery storage to store unused daytime generation for evenings (it can be added to an existing system later)
  • Charge your EV during the day using solar power
  • Pick your export tariff carefully: the gap between the best and worst rates is worth £100+ a year
  • Add a smart thermostat to align heating with solar generation

Charge your EV for free with solar?

The right EV charger makes all the difference. The Myenergi Zappi charges your car exclusively from surplus solar, bringing per-mile costs down to 1–2p.

Read: Best Home EV Charger UK 2026 →

Solar Panel Grants & Incentives 2026

There's no single national solar grant for all homeowners, but there are several schemes worth knowing about.

0%

0% VAT on Qualifying Solar Installations

Everyone qualifies

Qualifying energy-saving-material installations, including solar panels, are zero-rated for VAT until 31 March 2027, after which the rate reverts. No application needed: any reputable installer applies it automatically. On a typical £6,000–£10,000 system that saves roughly £1,200–£2,000.

Expires: 31 March 2027

£

ECO4: Free Solar for Low-Income Homes

Means tested

The Energy Company Obligation (ECO4) scheme can cover the full cost of solar panel installation for qualifying households. Eligibility typically requires receiving Universal Credit, Pension Credit, or certain other benefits. Installers stop taking on new ECO4 jobs before the scheme closes, so apply soon if you think you qualify. From 2027 the Warm Homes Plan takes over.

Closes: 31 December 2026 · Applies to: England, Scotland & Wales

Warm Homes: Local Grant

Low-income households

Part of the government's Warm Homes Plan, this council-run scheme funds upgrades including solar panels for lower-income households in England living in homes rated EPC D to G, worth up to £15,000 for energy efficiency (and up to £30,000 with low-carbon heating). Check with your local council whether it's taking part.

Runs until: 2028 · Applies to: England

£

Home Energy Scotland

No solar funding now

Solar panels (and batteries) were removed from the Home Energy Scotland Grant and Loan for new applications from June 2024, so there's currently no Scottish government grant or loan for solar PV. Scottish homes still get 0% VAT and SEG payments, and Home Energy Scotland still funds heat pumps and insulation.

Applies to: Scotland only

£

Smart Export Guarantee (SEG)

MCS installations

Not a grant but an ongoing income stream: you're paid for every unit of electricity you export to the grid. Open rates are around 4–6p/kWh, rising to about 12p if the same company supplies your electricity. Compare every SEG rate.

Ongoing · Requires MCS-certified installation

If you're on a low income or receive certain benefits, the ECO4 scheme can fund free solar panel installation, with no upfront cost at all. The scheme closes on 31 December 2026, so check if you qualify soon.

Check Your Grant Eligibility

Get matched with installers who can advise on which grants apply to your situation.

Check My Eligibility →

Choosing between monocrystalline, polycrystalline and specific manufacturers is where most buyers get stuck. We've compared six panels UK installers fit in our best solar panels guide, on efficiency, warranty and value, if you want to skip straight to specific recommendations.

Types of Solar Panels

Three main types are used in UK homes, each with different efficiency, cost and lifespan characteristics.

Most Popular

Monocrystalline

Efficiency: 21–25%

Made from single-crystal silicon. Almost every home panel fitted today is monocrystalline, and newer N-type cells (TOPCon, HJT and back contact) reach 22–25%.

Lifespan: 25+ years

Polycrystalline

Efficiency: 15–17%

Made from multiple silicon fragments. Less efficient and now rarely offered for UK homes, as monocrystalline prices have fallen to a similar level.

Lifespan: 20–25 years

Thin Film

Efficiency: 10–13%

Lightweight and flexible, but needs much more roof space for the same output. Rarely fitted on UK homes.

Lifespan: 15–20 years

Also Consider: Balcony Solar

From 27 August 2026, plug-in "balcony solar" kits became legal to self-install in the UK under new regulations (SI 2026/848), without needing an electrician for the connection itself. See our full guide on what changed and what the rules actually allow.

If you rent, live in a flat, or don't have a suitable roof, balcony solar panels are a plug-in alternative. A DNO notification is still required before connecting, and current rules limit you to one certified 800W device per household. They typically generate 300–800W and can meaningfully cut your electricity bills without any structural work.

Read our Balcony Solar Guide →  ·  Plug-in vs installed solar →

Want to compare specific panel brands?

We've compared six panels UK installers fit in 2026 on efficiency, warranty and value, with picks for small roofs and tight budgets.

Read: Best Solar Panels UK 2026 →
Two solar panel installers fitting panels on a UK house roof
Always use MCS-certified installers, as MCS certification is required to access Smart Export Guarantee payments

Solar Panel Installation

What to expect from the installation process, from first quote to first generation.

1
Get quotes (1–2 weeks)
Use our free service to get quotes from MCS-certified installers. Compare system sizes, panel brands, warranties, and prices.
2
Home survey (1–2 hours)
Your chosen installer visits to assess your roof, check your electrical system, and confirm the system design. Usually free with no obligation.
3
DNO notification (1–4 weeks)
Your installer notifies your Distribution Network Operator, the company that manages the local electricity grid. Most homes also don't need planning permission (see solar planning rules).
4
Installation day (1–2 days)
Most domestic installations take one to two days. Scaffolding goes up, panels are mounted, inverter is installed, system is connected and tested.
5
Generating & saving
Your system starts generating immediately. Register for SEG payments with your energy supplier and start monitoring your generation through the app.

What to watch out for

  • Installers who pressure you to sign same-day
  • Companies not registered with MCS
  • Unusually cheap quotes with unknown panel brands
  • Installers who won't provide a written quote
  • Inflated savings projections without supporting data

Which kind of quote suits you?

"I'd rather deal with one good installer" Get a fitted price from Blue Ape Renewables, the installer we work with. MCS-certified and NAPIT-accredited, fitting solar panels and batteries across England, Wales and Scotland. Get a fitted price →

Tell us about your project and local installers will quote

Both are free and there's no obligation. We earn a commission if you go ahead with Blue Ape or with one of the installers you are matched with.

Solar Panels UK: Frequently Asked Questions

How long do solar panels last?

The Energy Saving Trust says panels last 25 years or more, and most come with 25 to 30-year performance warranties. The inverter usually needs replacing once, after around 12 years, so allow for that. For prices by system size, see our solar panel cost guide.

Are solar panels worth it in 2026?

For most homes with a suitable roof, yes. High electricity prices, 0% VAT and SEG export payments mean the Energy Saving Trust puts typical payback at 9 to 12 years, against a panel life of 25 years or more. It's less compelling with heavy shading, a north-facing roof, or if you plan to move soon.

How many solar panels do I need?

A 4kW system is about 10 standard 400W panels (or 9 of the newer 450W panels), which suits a typical 2–3 bed house. Larger or higher-usage homes may need 15–20+ panels for a 6kW+ system. Your installer will size this to your roof and household usage during the survey.

Can I get solar panels if my roof faces east or west?

Yes. South-facing roofs generate the most, but east and west-facing roofs still produce a useful amount: about 20% less than south-facing for the same system, based on PVGIS figures for the Midlands. A south-west roof loses only about 7%. North-facing roofs make roughly half as much and are rarely worthwhile.

Is it better to get solar panels alone or solar plus battery?

Solar alone pays back faster because it costs less upfront. The Energy Saving Trust puts a battery at £5,000–£8,000, though smaller 5kWh batteries start from about £3,950 fitted. A battery lets you use stored solar power in the evening instead of exporting it, and charge cheaply overnight, so it suits time-of-use tariffs, people who work from home and EV owners. See our Battery Storage Guide for a full breakdown.

Can I charge an EV from solar panels?

Yes. A solar-diverting EV charger like the Myenergi Zappi automatically routes surplus solar generation to your car instead of exporting it, bringing your per-mile driving cost down to around 1–2p. See our Best EV Charger UK guide for details.

Can I get solar panels if I live in a flat or rent?

Traditional rooftop solar requires landlord permission and roof access, which is often impractical for flats. Plug-in balcony solar became legal to self-install from 27 August 2026 and requires no roof access. See our Balcony Solar Guide for what it can realistically deliver.

What happens to excess solar electricity I don't use?

Any surplus is automatically exported to the grid, and you're paid for it through the Smart Export Guarantee (SEG): around 4–6p/kWh on open tariffs, about 12p if the same company supplies your electricity, and more if you bought your system through them. A battery lets you store that surplus for evening use instead of exporting it, which is usually worth more than the SEG rate.

Do I need planning permission?

In most cases, no. Solar panels on domestic roofs fall under permitted development rights in England, Scotland and Wales. Exceptions include listed buildings, some conservation areas, and panels that protrude more than 200mm from the roof surface. See our solar panel planning permission guide for the detail.

Do solar panels add value to your house?

Research suggests they can, mainly by cutting running costs and improving the EPC rating, which buyers increasingly look at. Owned panels help more than leased ones, which can complicate a sale. See our solar panels and house value research.

Do solar panels work in winter?

Yes, but they produce much less. A UK system typically generates only about 7% of its yearly output across December and January (PVGIS figures for a south-facing 4kW system in Birmingham), so most homes still buy most of their winter electricity from the grid. That's why a battery on a cheap overnight tariff often matters more in winter than extra panels.