Quick Sizing Guide
1-2 bed flat/house: 6-8 panels (2-3kW) | 3 bed semi: 10-12 panels (4-5kW) | 4 bed detached: 12-16 panels (5-6kW) | Large home + EV: 16-20 panels (6-8kW). Each 420W panel measures roughly 1.7m × 1.1m.
Factors That Affect Size
Annual electricity usage is the biggest factor. Check your bill — the average UK home uses 2,900 kWh/year. If you plan to add an EV charger or heat pump, size up. Roof orientation and shading also affect how many panels you need.
Don't Over-Size
It rarely makes sense to install more panels than your roof and budget allow. A well-sized system with battery storage delivers better returns than an oversized system without one. Our surveyors recommend the optimal size for your specific situation.
Related Guides & Resources
Solar Panel Installation
MCS certified solar panel systems with 30-year warranties.
Battery Storage
Store solar energy for evening use and maximise savings.
Air Source Heat Pumps
Cut heating costs 50% with £7,500 BUS grant.
Solar Panel Costs 2026
Up-to-date pricing for residential solar systems.
Solar Savings Guide
How much can you save with solar panels?
Government Grants
Check your eligibility for solar grants and funding.
0% Finance Options
Spread the cost with affordable monthly payments.
Instant Solar Estimate
Get a quick price estimate for your home.
