What is a fair price per kWp?

£1,300-£1,800/kWp installed (0% VAT). A 4kW system: £5,200-£7,200 in the fair range. Significantly above or below warrants investigation.

Is the cheapest quote the best?

Rarely. Compare total value: panel quality, inverter brand, warranty length, installer track record, and IBG. A £1,000 'saving' from budget components can cost £5,000+ over 25 years.

How to Compare Solar Prices

Last updated: 18 March 2026

Independently written

Comparing solar panel prices — Compare on TOTAL VALUE — not just the headline price. The cheapest is rarely the best deal.

How do I compare solar panel prices?

Compare solar prices using these metrics: (1) Cost per kWp: £1,300-£1,800 is the fair UK range. Under £1,100 = suspiciously cheap. Above £2,000 = overpriced. (2) Panel efficiency and brand. (3) Inverter type and warranty. (4) What is included vs excluded (scaffolding, MCS, DNO). (5) Installer reviews (Trustpilot + Google). (6) Insurance-Backed Guarantee. (7) Total estimated savings (realistic?). The cheapest quote often has weaker components and shorter warranties — costing you more over 25 years.

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