Average Costs by System Size
3kW (8 panels): £4,500-£5,500 | 4kW (10 panels): £5,500-£7,000 | 5kW (12 panels): £6,500-£7,500 | 6kW (14 panels): £7,500-£9,500. All prices include installation, scaffolding, and MCS certification. VAT is 0% on domestic solar installations.
What Affects the Price?
System size is the biggest factor. Other variables include panel brand (budget vs premium), inverter type (string vs hybrid), roof complexity (scaffolding requirements, tile type), and whether you add battery storage (+£3,000-£6,000).
Are Solar Panels Getting Cheaper?
Panel prices have fallen 80% over the past decade. However, installation labour and electrical components maintain a price floor. Current prices represent excellent value — especially with 0% VAT and rising electricity costs making payback periods shorter than ever.
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