How Much Do Solar Panels Cost in the UK in 2026?

The cost of a solar panel system depends on its size (measured in kWp), the panel technology, the inverter, and whether you include battery storage. Here are typical fully installed prices in 2026:

• 3 kWp system (8–10 panels): £4,500–£6,000 — Suitable for a 1–2 bedroom home or low electricity usage. • 4 kWp system (10–12 panels): £5,500–£7,500 — The most common size for a 3-bedroom semi. • 6 kWp system (15–18 panels): £7,000–£9,500 — Good for larger homes or those with a heat pump. • 8–10 kWp system (20–28 panels): £9,000–£14,000 — For maximum self-sufficiency, especially with an EV and heat pump.

These prices include panels, inverter, mounting hardware, cabling, DNO notification, and MCS certification. VAT is 0% on domestic solar installations.

We install Aiko Gen 4 ABC (All-Back-Contact) panels, which represent the latest advancement in solar cell technology. All electrical contacts are on the rear of the cell, eliminating the metal gridlines visible on standard panels.

The benefits:

• Higher efficiency — Up to 23.6% module efficiency, generating more power per square metre of roof. • Better low-light performance — More power on cloudy days and in morning/evening light. • Cleaner aesthetics — No visible busbars means a sleek, uniform black appearance. • Enhanced durability — Lower cell stress leads to less degradation over time.

While premium panels cost slightly more per watt, they generate more electricity per square metre, which matters when roof space is limited.

Adding a battery lets you store excess solar electricity for use in the evening when you need it most. Popular options include:

• 5 kWh battery: £2,500–£3,500 — Covers evening usage for smaller households. • 10 kWh battery: £4,000–£5,500 — The sweet spot for most homes. • 13–15 kWh battery: £5,500–£7,500 — For high-usage homes or those with a heat pump and EV.

We install Sigenergy and EcoFlow systems, which offer excellent cycle life, smart energy management, and expandable capacity.

With 0% VAT and current electricity prices, a typical 4 kWp solar system (without battery) pays for itself in 6–8 years through reduced electricity bills and Smart Export Guarantee (SEG) payments.

With a battery, the payback extends to 8–11 years, but you also gain energy independence and protection against future electricity price rises. Given that panels carry 25-year performance warranties, the return on investment is substantial.