Energy prices are skyrocketing nowadays due to a shortage of supply. As a solution, renewable sources of energy such as solar are clearly the best alternative. However, here comes a million-pound question: “How much will you pay for switching to solar?”
There are several things that influence the price: the quantity of panels, their efficiency, roof size, roof tilt angle, batteries, inverter capacity, and Smart Export Guarantee (SEG). In 2026, the cost of installing a full PV system (solar panels, inverters, batteries, including scaffolding and mounting) for the two-bed household will amount to £7,800 to £10,500 on average.
So, here you will learn about the cost of installing solar panels in the United Kingdom. This guide considers all main expenses related to the installation, such as panels, inverter, battery, mountings, labor costs, and electrical installation.
This guide also considers financing the process, savings by doing it independently, costs that follow the installation, and choosing an experienced installer.
Solar Panel Installation Cost
The price of installation depends on house size and, consequently, the number of solar panels. The table below contains approximate estimates based on these features. All of the figures consider solar panels, an inverter, standard installation, and batteries where necessary.
| Home Type | Typical Number of Panels | Estimated System Size | Estimated Total Cost |
|---|---|---|---|
| Mid-terrace | 4–6 panels | 2–2.5kW | £4,500–£6,500 |
| End-terrace/Semi-detached | 8–10 panels | 3–4kW | £6,000–£9,000 |
| Small detached | 12–16 panels | 5–6kW | £8,500–£13,500 |
| Large detached | 18–22 panels | 8–10kW | £14,000–£22,000 |
The price of installation depends on house size and, consequently, the number of solar panels. The table below contains approximate estimates based on these features. All of the figures consider solar panels, an inverter, standard installation, and batteries where necessary.
Solar Panel Cost
Solar panels constitute most of the cost, as they produce power. Usually, UK homeowners opt for monocrystalline panels due to their efficiency.
Average Cost of Solar Panels (Before Installation)
| System Size | No. of Panels | Approximate Panels Cost |
|---|---|---|
| 3kW | 4 – 6 panels | £1,700–£2,300 |
| 4kW | 6 – 8 panels | £2,200–£2,900 |
| 5kW | 8 – 10 panels | £2,800–£3,700 |
| 6kW | 10 – 14 panels | £3,300–£4,400 |
| 8kW | 16 – 20 panels | £4,600–£6,200 |
| 10kW | 22 – 24 panels | £5,800–£7,900 |
| 12kW | 26 – 28 panels | £6,500–£9,500 |
The price per kW of solar panels can range from £560 to £780 (not installed).
Factors Affecting Solar Panel Cost
- Panel efficiency
- Brand
- Warranty period
- Roof size
- Number of panels
- Type of solar panel
- Installation complexity
Off-grid solar living is feasible but difficult to achieve in the UK. However, the majority of homeowners opt for hybrid installations to use solar and grid energy. If you want professional advice, contact a solar installer today.
Solar Inverter Cost
The solar inverter transforms DC power generated by panels into AC, which can be used at home. The solar inverter is an essential element of every solar energy system.
Average Solar Panel Inverter Cost
| Inverter Type | Average Cost |
|---|---|
| String inverter | £700–£1,300 |
| Hybrid inverter | £1,200–£2,300 |
| Microinverters | £1,800–£3,500 |
Factors Affecting Inverter Cost
- System size
- Inverter type
- Battery compatibility
- Brand
- Warranty
Solar Panel Battery Cost
Currently, most UK homeowners prefer to install batteries to store the power generated by their panels. This reduces grid use during evenings.
The solar panel battery price depends mainly on storage capacity.
Average Solar Battery Storage Price in the UK
| Battery Capacity | Average Cost |
|---|---|
| 5kWh | £2,000–£3,200 |
| 8kWh | £3,200–£4,500 |
| 10kWh | £4,000–£5,800 |
| 13.5kWh | £5,500–£7,500 |
The solar panel battery storage cost includes installation in most cases.
Factors Affecting Solar Battery Cost
- Battery size
- Battery chemistry
- Brand
- Warranty
- Hybrid inverter compatibility
Solar Panel Mounting System Cost
The mounting structure secures the solar PV panels to your roof.
Average Solar Panel Mounting System Cost
| Roof Type | Average Cost |
|---|---|
| Pitched roof | £500–£900 |
| Slate roof | £700–£1,300 |
| Flat roof | £900–£1,800 |
| Ground-mounted solar | £2,000–£5,000 |
Factors Affecting Mounting Cost
- Roof type
- Roof angle
- Roof condition
- Scaffold requirement
- Ground-mounted solar systems
Solar Panel Installation Labour Cost
The solar panel installation labour cost covers survey, mounting, wiring, testing, commissioning, and certification.
Average Installer Cost
| System Size | Labour Cost |
|---|---|
| Small system | £1,000–£1,500 |
| Medium system | £1,500–£2,200 |
| Large system | £2,200–£3,500 |
The solar panel installer cost varies with property size and roof access.
Factors Affecting Labour Cost
- Roof height
- Installation difficulty
- System size
- Location
- Installer experience
Solar Panel Electrical Work Cost
Electrical work connects the system safely to your home’s consumer unit.
Average Cost
| Electrical Work | Average Cost |
|---|---|
| Consumer unit upgrades | £300–£700 |
| Meter connection | £150–£400 |
| Testing and certification | £150–£300 |
Factors Affecting Electrical Work Cost
- Existing wiring
- Fuse board condition
- Battery installation
- Grid connection
Average Solar Panel System Cost by Size
| System Size | Average Cost Without Battery | Cost of Solar Panels with Battery |
|---|---|---|
| 3kW | £4,500–£6,000 | £7,000–£8,500 |
| 4kW | £5,500–£7,500 | £8,000–£10,000 |
| 5kW | £6,500–£8,800 | £9,000–£11,800 |
| 6kW | £7,500–£9,800 | £10,500–£13,500 |
| 8kW | £10,500–£13,500 | £14,000–£18,000 |
| 10kW | £13,000–£17,000 | £17,000–£22,000 |
| 15kW | £18,000–£24,000 | £24,000–£31,000 |
For instance, 12 panels installation will cost you about £8,000–£11,000 on average in the UK, depending on panel efficiency and battery installation.
Additionally, a solar system with 5 kW capacity and batteries will be estimated between £9,000 and £11,800.
Find an MCS-Certified Installer
Do not choose an installer based on the lowest quote offered, as it may indicate poor-quality equipment or installation work. High-quality installation will last for 30 years, while a poor installation will cost you money after just a few years.
Choose a solar panel installer by checking:
- Years of experience
- MCS Certification
- TrustMark registration
- Installation warranty
- Payment options
- Customer reviews
- Professional service
A slight increase in price provides a better long-term return.
DIY Mounting Solar Panels vs Professional Installation
Some homeowners or private landlords decide to try the DIY method to lower expenses. However, even when saving between £800 and £2,000 due to mounting, one will require hiring electricians for additional tasks.
DIY may influence warranties, insurance coverage, MCS certification, and eligibility for the Smart Export Guarantee. Hence, a professional installation is safer in terms of all of the above.
Post-Installation Costs
Most solar panels need very little maintenance. Typical yearly costs include:
| Item | Average Annual Cost |
|---|---|
| Cleaning | £100–£200 |
| Inspection | £100–£150 |
| Inverter replacement after 10–15 years | £700–£2,300 |
| Battery replacement after 10–15 years | £2,000–£6,000 |
Although there are maintenance costs, they remain low compared with lifetime energy savings.
Solar Panel Savings
A well-sized solar panel system can reduce your electricity bill by hundreds of pounds each year. Savings depend on:
- Electricity usage
- Battery storage
- Roof direction
- Panel efficiency
- SEG payments
- Local weather
Many homeowners use a solar panel savings calculator or solar panel cost calculator before buying. Most systems recover their upfront cost within 8 to 12 years.
Are Solar Panels Worth It in the UK?
For numerous families across the country, the answer is positive. Although the cost is high, solar panels supply households with free energy for decades; they work for between 25 and 30 years or longer. Increased energy costs result in higher savings.
Discussing how long solar panels take to pay back, households usually see a return on investment in 8 to 12 years due to energy consumption and battery storage.
If you want a closer look at whether solar panels are a worthwhile investment, read our guide on Are Solar Panels Worth It in the UK?.
Conclusion
The price to install solar panels involves multiple aspects such as the system capacity, the quality of panels, batteries, roofing, and labor. Most UK households will have to pay about £7,800 to £10,500 in 2026 for an appropriate kit for a two-bedroom house. Larger houses are more expensive because they need more elements.
Instead of simply selecting a company that offers the cheapest installation, one should compare the quotes carefully. This results in better efficiency, increased lifespan of the equipment, and overall savings in the future. Increased electricity costs, together with advanced technology, make purchasing solar panels reasonable.
Frequently Asked Questions
How much do solar panels cost in the UK?
Well, the average cost of solar panels is pretty tied to the system size. Most households end up paying around £4,500 to £17,000, though if you also want a battery, then the total feels higher, like definitely more.
What is the average solar panel installation cost?
For a full home setup, the average solar panel installation cost usually sits between £6,000 and £22,000, depending on the system size and what else gets included.
What is the solar power cost UK homeowners should expect?
The total solar power cost UK families pay depends on a few things: panel size, battery storage, labour, roof type, plus any electrical upgrades.
How much does a solar array cost?
A solar array generally costs from about £4,500 for smaller systems, up to over £22,000 for bigger residential installs.
Does adding a battery increase costs?
Yes, adding a battery does increase the bill. A solar battery typically adds something like £2,000 to £7,500, depending on capacity and how much storage you want.
Can solar panel grants reduce costs?
Sometimes, yes. Certain UK local or national government schemes may help with lowering the cost of solar, but the availability keeps shifting, so it’s worth checking what support is active before you buy.