What is the average price?

£6,750 for a 4kW system is the UK average in 2026. Budget installers: £5,500. Premium: £8,000. The variation reflects component quality and installer margins.

Is the average price fair?

Yes — £1,300-£1,800 per kWp is the fair range. Any quote within this range is competitive. Below £1,100: investigate component quality. Above £2,000: investigate why.

Average Solar Panel Cost UK 2026

Last updated: 18 March 2026

Independently written

Average UK solar cost 2026 — Average 4kW system: £6,750. Range: £5,500-£8,000. All-inclusive at 0% VAT.

What is the average cost of solar panels UK?

Average UK solar panel cost in 2026: £6,750 for a 4kW system (10 panels) at 0% VAT. Range: £5,500-£8,000 depending on panel brand, inverter type, and installer. Price per kWp: £1,375-£2,000. This includes: panels, inverter, mounting, wiring, scaffolding, labour, MCS certification, and DNO notification. No hidden extras with MCS-certified installers. Adding a 10kWh battery: +£4,000-£6,000. Prices have stabilised since 2023 — no significant further drops expected.

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