Solar Power System Cost UK (2026)

Complete guide to solar panel system costs, savings, and payback periods for UK homeowners.

Solar System Costs & Savings

System	Cost	Output/yr	Saving/yr	Payback
3 kW (8 panels)	£5,000–£6,000	2,700 kWh	£400–£500	10–12 yrs
4 kW (10 panels)	£6,500–£7,500	3,400 kWh	£500–£650	10–12 yrs
5 kW (12 panels)	£7,500–£9,000	4,250 kWh	£600–£800	9–11 yrs
6 kW (14 panels)	£8,500–£10,500	5,100 kWh	£750–£950	9–11 yrs
4 kW + 5 kWh battery	£10,000–£12,000	3,400 kWh	£700–£900	10–13 yrs
6 kW + 10 kWh battery	£13,000–£16,000	5,100 kWh	£1,000–£1,300	10–12 yrs

All prices include 0% VAT and MCS certification. Prices as of 2026.

Frequently Asked Questions

How much does a solar power system cost in the UK?

A typical 4 kW solar system costs £6,500–£7,500 installed. With battery storage, costs range from £10,000–£16,000 depending on system size. All residential installations qualify for 0% VAT.

Is 0% finance available for solar?

Yes — Greentech Renewables offers 0% finance on solar panel installations subject to status, allowing you to spread the cost interest-free over 1–2 years.