UK Solar Panel Price Guide – Costs, System Sizes, Examples and Savings
In 2026, the average cost of installing solar panels in the UK typically falls between £5,000 and £10,000 for a standard domestic system, depending on system size, panel type, roof complexity, scaffolding requirements and whether battery storage is included.
Solar PV System Size Examples and Costs
| System Size | Typical Use | Installed Cost Range |
| 2kW (small home) | 4-6 panels | ~ £4,000-£6,000 |
| 3-3.5kW (small-medium) | 8-10 panels | ~ £5,000-£7,000 |
| 4kW (average UK home) | 10-12 panels | ~ £5,500-£8,000 |
| 5kW (larger demand) | 12-15 panels | ~ £8,000-£10,500 |
| 6kW (high consumption) | 15-18 panels | ~ £9,000-£13,500 |
Solar Battery Storage Costs
If you choose to include solar battery storage, typical prices in the UK in 2026 are:
- 5 kWh battery £2,000-£4,000
- 5-10 kWh battery £4,000-£7,500
Batteries increase self-consumption of solar energy, reducing grid reliance and potentially improving long term savings – but they do add to the initial solar installation cost.
What Influences Solar Panel Prices in the UK?
Several factors affect your final price:
- System Size (kW) – larger systems cost more upfront but generate more clean electricity.
- Panel Type and Efficiency – premium monocrystalline panels cost more per kW than standard polycrystalline panels.
- Installation Complexity – roof access, height, pitch and shading can change labour costs.
- Battery Storage – optional, adds to overall price if included.
- Installer Choice and Warranty – accredited installers often charge more but provide better guarantees.
Typical Savings and Payback Periods
Installed solar PV systems save South East homeowners money over time by reducing electricity bills and exporting surplus electricity via schemes like the Smart Export Guarantee (SEG). A 4kW system can save homeowners up to 80% on their electricity bills, equivalent to £600-£1,000 per year.
Most residential solar PV systems pay for themselves within 6-10 years for solar PV only and 8-12 years when battery storage is included. The payback period will vary depending on electricity prices, tariffs, self-consumption rates and energy profile and usage patterns.
Find Out How Much You Can Save
Try our Solar Calculator to find out how much a solar PV and battery storage system can save you.
Smart solar starts with the right advice.
FAQs
How much do solar panels cost in the UK in 2026?
In 2026, the average cost of solar panels in the UK is typically £5,000 to £10,000 for a standard 3–5kW residential solar PV system. The final price depends on system size, roof type, inverter choice, and whether battery storage is included.
Most 4kW systems (suitable for an average UK home) cost between £6,000 and £8,000 fully installed.
How many solar panels do I need for my home?
The number of solar panels depends on your electricity usage and roof space:
- 2–3kW system → 6–8 panels
- 4kW system (average UK home) → 10–12 panels
- 5–6kW system → 12–16 panels
Most modern panels are between 400W and 450W each, meaning fewer panels are required compared to older systems.
What is the average cost per kW for solar panels in the UK?
In 2026, the typical installed cost per kW is approximately:
£1,400 – £1,600 per kW
Larger systems often benefit from economies of scale, meaning the price per kW decreases slightly as system size increases.
How much does a solar battery cost in 2026?
Solar battery storage in the UK typically costs:
- 3–5kWh battery: £2,000 – £4,000
- 5–10kWh battery: £4,000 – £7,500
Battery pricing depends on capacity (kWh), brand, warranty length, and whether it’s AC-coupled or DC-coupled.
Are solar panels worth it in the UK in 2026?
Yes — for many households, solar panels are financially worthwhile due to:
- Rising grid electricity prices
- Smart Export Guarantee (SEG) payments
- 0% VAT on domestic solar installations (currently applicable)
- Improved panel efficiency
Typical payback periods are 6–10 years, depending on self-consumption and energy usage patterns.
How long do solar panels last?
Most modern solar panels come with:
- 25–30 year performance warranties
- 10–25 year product warranties (depending on manufacturer)
Panels usually continue generating electricity beyond 30 years, though output gradually reduces over time (known as degradation).
Do solar panels increase property value?
Research across the UK property market suggests homes with solar PV systems can be more attractive to buyers due to:
- Lower running costs
- Improved EPC rating
- Increased energy independence
While uplift varies, energy-efficient homes generally command stronger buyer interest.
How much can I save with solar panels?
Annual savings vary depending on system size and usage, but typical estimates for a 4kW system are:
- £600 – £1,000+ per year in combined bill savings and SEG payments (depending on electricity tariffs and usage patterns).
Homes that use more electricity during daylight hours see the greatest savings.
