A typical UK solar panel installation costs £5,500-£14,000 depending on system size, with the MCS-verified national average at £7,279 for a 3-4 kWp system. The installation process takes 1-3 days for residential and 2-4 weeks for commercial. Choosing an MCS-certified installer is essential — it is required for Smart Export Guarantee eligibility and all government incentive schemes.
| System | Panels | Cost (inc 0% VAT) | Annual Savings | Payback |
|---|---|---|---|---|
| 3 kWp | 7-8 | £4,500-£6,500 | £450-£650 | 8-11 yrs |
| 4 kWp | 9-10 | £5,500-£8,000 | £600-£900 | 7-9 yrs |
| 6 kWp | 14-15 | £7,500-£11,000 | £900-£1,300 | 6-8 yrs |
All prices include panels, inverter, mounting, scaffolding, and electrical work at the current 0% VAT rate (expires 31 March 2027). Always get at least 3 quotes from MCS-certified installers. The UK has over 5,250 MCS-certified contractors — the highest ever.
Step 1: Survey — A qualified surveyor assesses your roof orientation, structural capacity, shading, and electrical setup. Most installers offer free surveys.
Step 2: Design & quote — You receive a detailed system design with projected generation, savings calculations, and cost breakdown. Compare at least 3 quotes.
Step 3: Installation — Scaffolding goes up, mounting rails are fixed to the roof, panels are secured, and the inverter is wired in. Residential installations take 1-3 days.
Step 4: Connection & commissioning — The system is connected to your consumer unit, tested, and commissioned. Your installer notifies your DNO (Distribution Network Operator).
Step 5: MCS certificate & SEG registration — You receive your MCS certificate (needed for SEG payments) and can register with an energy supplier to get paid for surplus electricity you export.
Residential installations take 1-3 days. The total timeline from survey to switch-on is typically 4-8 weeks including surveys, paperwork, and scheduling.
Most residential rooftop installations are permitted development and don't need planning permission. Exceptions include listed buildings, conservation areas (front-facing), and flat roofs where panels protrude more than 200mm above the roofline.
MCS (Microgeneration Certification Scheme) certifies that your installer meets industry standards. MCS certification is required for Smart Export Guarantee payments, all government grants, and most warranty claims. Never use a non-MCS installer.
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Commercial Solar · Schools · Hotels · Warehouses · Farm Buildings · Factories · Restaurants · Hospitals
Guides: Solar Costs · Business Grants · Energy Audits