Solar Panel Installation: UK Costs and Savings

Solar panel installation is the process of fitting a roof-mounted photovoltaic (PV) system that turns daylight into electricity for your home, and for a typical 4kW system it costs several thousand pounds, with prices varying by installer, roof complexity and system specification. For a household on a standard variable tariff sitting above the price cap floor, generating your own power is one of the few ways to cut a rising electricity bill for the long term rather than chasing a marginally cheaper deal every year.

The maths has shifted in 2026. The energy price cap rose 13% for the July to September 2026 period, according to Ofgem, so every unit you generate yourself avoids buying electricity at roughly 26p per kWh. Add a Smart Export Guarantee tariff and you can also earn money for surplus power sent back to the grid. Free Price Compare sources the figures below from Ofgem, gov.uk and MCS publications so you can judge whether solar stacks up for your home.

Last updated: August 2026

Written by the Free Price Compare editorial team | Reviewed August 2026

How much does solar panel installation cost in the UK in 2026?

Solar panel installation costs several thousand pounds for a typical UK home, depending on system size and installation complexity. A standard system suited to a three-bedroom house generally falls within a broad mid-range once fully installed, while a smaller system for a modest property usually costs less. Adding battery storage typically lifts the total by a significant amount. On a per-kilowatt basis, installed solar varies significantly depending on panel quality, roof complexity and any extras such as an upgraded inverter. These are whole-system figures covering panels, the inverter, mounting hardware, scaffolding and electrical work.

Costs vary by region. Installation prices tend to be highest in the South East of England and lowest in the North East. Materials and labour are both major parts of the total bill, with labour often the most variable element.

Figures are indicative and may change. If you are weighing up brands and quotes, our guide to Project Solar UK installation and battery storage walks through how a supplier prices a full system.

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How much does a single solar panel cost?

A single 400W solar panel usually costs a few hundred pounds for the panel alone. That price does not include installation, the inverter that converts the panel’s direct current into usable mains electricity, the mounting system or the electrical work needed to connect it. Because so much of a solar project is labour, scaffolding and shared components, buying panels individually rarely reflects the true cost of a working system. A standard inverter typically lasts many years before needing replacement and adds to the overall system cost.

Panels and PV panels are the same thing in domestic solar. “PV” stands for photovoltaic, the technology that generates electricity from light, so a solar PV panel and a solar panel refer to the same rooftop unit. The only different product is a solar thermal panel, which heats water rather than generating electricity, and that is a separate system.

Is solar battery storage worth adding?

Solar battery storage is worth adding if you use a lot of electricity in the evening or overnight, when your panels are not generating. A battery stores surplus daytime power so you can use it later instead of buying from the grid, and it can add a significant extra cost to the project depending on capacity. A 4 to 5kWh battery typically adds a significant extra cost to the project. Batteries can help households access some higher-paying export tariffs, depending on the supplier and tariff conditions.

A battery does not usually pay for itself as quickly as the panels alone, and lifetime replacement should be factored in. If most of your usage is during daylight hours, panels without a battery often give a faster payback. Our comparison of Soly solar panels and battery storage sets out how battery sizing affects the price.

Is solar worth it in the UK despite cloudy weather?

Solar is worth it in the UK for most homes with a suitable roof, because panels generate usable electricity from daylight rather than direct sunshine, so overcast conditions reduce but do not stop output. Payback periods vary widely depending on usage, roof orientation, export rates and how much power you use during the day, and annual electricity bill savings can be substantial for households that self-consume a lot of their generation. With the price cap setting electricity at 26.11p per kWh for July to September 2026, according to Ofgem, every self-generated unit avoids buying at around that rate.

A south-facing roof with little shading performs best, but east or west-facing roofs still generate worthwhile amounts spread across the day. The strongest returns go to households that shift usage into daylight hours, run appliances like the dishwasher and washing machine when the sun is up, or add a battery to capture surplus. UK rooftop solar installations hit record highs in 2025, reflecting growing household interest in solar.

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Will I still pay for electricity after installing solar?

Yes, you will still pay for some electricity after installing solar, because panels only generate during daylight and most homes need power in the evening and overnight. Solar reduces your grid electricity purchases rather than eliminating them entirely. Without a battery, a typical home can cover a substantial share of its annual electricity from its own panels; adding storage raises the share you can self-supply. You will also keep paying the daily standing charge on your electricity supply, which the price cap set at 57.19 pence per day for July to September 2026, according to Ofgem.

Gas heating and hot water are separate, so if you have a gas boiler your gas bill is unaffected by solar. The gas standing charge and gas unit rate are separate from solar generation and continue to be charged under your gas supply. Solar mainly cuts the electricity portion of your bill and lets you earn from surplus generation.

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What is the Smart Export Guarantee and how much does it pay?

The Smart Export Guarantee (SEG) is a government-backed scheme requiring larger licensed energy suppliers to pay households for surplus solar electricity exported to the grid. Each supplier sets its own SEG rate, which can be any amount above zero, so rates vary widely between tariffs. Flat export rates vary widely in 2026, with lower and higher rates available depending on supplier and tariff. Time-of-use tariffs can pay considerably more during peak evening hours, though this may require a compatible battery and smart meter.

A typical system exporting a substantial amount each year at a competitive export rate could earn a meaningful annual income. To apply for any SEG tariff, your system must be installed by an MCS-certified installer and you need the MCS certificate. Export rates can change on around 30 days’ notice, and some suppliers have adjusted or paused tariffs during 2026, so check the live rate before signing up. For most domestic households SEG income is not taxable under the usual trading allowance rules, but this is general information, not tax advice.

Do I need a smart meter for solar panels?

You do not legally need a smart meter simply to have solar panels, but you do need one to claim most Smart Export Guarantee tariffs, because SEG payments are based on your actual metered export. A smart meter records how much surplus electricity you send to the grid, letting your supplier pay you accurately. Without a smart meter, some suppliers estimate exports at a fixed deemed rate, which usually pays less. If you want the higher time-of-use export tariffs, a smart meter is a firm requirement alongside compatible battery storage.

What solar panel grants are available in the UK for 2026?

Solar panel grants and financial support in the UK for 2026 centre on 0% VAT relief, the Smart Export Guarantee and targeted grant schemes for lower-income and less energy-efficient homes. The most widely available benefit is the 0% VAT rate on eligible solar and battery installations, which runs until 31 March 2027 and can reduce the final installed cost. Beyond that, government support is means-tested or property-specific rather than universal, and headline figures and eligibility have shifted during 2026, so confirm the current terms on gov.uk before relying on any single amount.

The government’s Warm Homes Plan brings together energy-efficiency funding including a Warm Homes Local Grant aimed at low-income households. Older schemes such as ECO4 and the Great British Insulation Scheme also route support to eligible homes through energy suppliers. Grant amounts, closing dates and qualifying criteria vary and change over time, so treat any figure you see elsewhere as indicative until you have checked the official guidance.

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Why does using an MCS-certified installer matter?

Using an MCS-certified installer matters because MCS certification is the condition for claiming Smart Export Guarantee payments and most government grant schemes, and it signals the work meets a recognised quality standard. MCS stands for the Microgeneration Certification Scheme, the UK body that certifies renewable installers and the systems they fit. When your installer is MCS-certified, you receive an MCS certificate on completion, which suppliers require before they will pay you for exported electricity. It also means your installer should be signed up to a consumer protection code such as RECC or HIES, giving you recourse if something goes wrong.

Choosing a certified installer protects the financial case for your system as much as the technical quality. An install done by a non-certified fitter can be perfectly functional but leaves you unable to claim export income, which undermines the payback. Always confirm certification before signing a contract, and check reviews and workmanship guarantees. Our guide to Evergreen Power solar panels and battery storage shows what a proper end-to-end install process looks like.

How can bill-conscious households get the best value from solar?

Bill-conscious households get the best value from solar by getting several quotes from MCS-certified installers, sizing the system to their actual usage, and pairing it with a well-chosen Smart Export Guarantee tariff. Quotes for the same property can vary by thousands of pounds, so comparing at least three is the single most effective way to avoid overpaying. Match the system size to how much electricity you use during daylight rather than over-specifying, and only add a battery if your evening or overnight consumption justifies the extra £2,500 to £7,500.

• Get at least three written quotes from MCS-certified installers and compare the total installed price, not just the per-panel cost.
• Confirm the 0% VAT relief has been applied while it lasts.
• Shift high-use appliances into daylight hours to use more of your own generation.
• Compare Smart Export Guarantee tariffs on their live rate before committing, and check whether a battery get access tos a better time-of-use rate.
• Check the installer’s workmanship guarantee, panel warranty and inverter warranty in writing.

Ongoing costs are usually modest. Panel cleaning and any annual servicing both add to ongoing costs. Compared with a rising grid bill, self-generated power stays fixed once the system is paid off. If you also want to check you are not overpaying on your current tariff, comparing home energy deals alongside a solar decision helps you tackle both sides of the bill.

• 0800 Repair | Solar Panels & Renewable Energy UK
• Soly Solar Panel | UK Solar Installation & Battery Storage
• Evergreen Power | Solar Panels & Battery Storage UK
• Go Green with Purelec Energy Solar Panel Installation
• Clever Energy Solar | Solar Panels & Battery Storage UK

Information correct as of 18 August 2026. Prices, tariffs, policy details and providers change frequently, so please check the latest details before making a decision. This article is for general information only and does not constitute financial advice. Free Price Compare is authorised and regulated by the Financial Conduct Authority (FCA).