Free Tools
Solar Panel Calculator UK
Find your home on the map, place solar panels on your roof and instantly see your costs and savings — panel by panel.
Step 1 — Find your property
Enter your address or postcode to load a satellite view of your roof.
Enter your home address or postcode to get started.
Your address is only used to show your roof on the map — we don't store it.
Step 2 — Place solar panels on your roof
Click on your roof to place panels. The counter updates instantly as you go.
Each panel is 400W. Annual generation based on your location's average sun hours. Electricity savings at 27p/kWh, SEG export at 15p/kWh. Install cost estimate based on current UK market rates — actual quotes may vary. This tool provides estimates only and is not a quote.
📅 Rates last verified: June 2026 · Electricity 27p/kWh · SEG 15p/kWh
Estimates only — not a quote. Get a real quote free →
Want a detailed financial breakdown?
Use our savings calculator below to factor in battery storage, EVs and 25-year returns.
Detailed savings calculator
Enter your system size, electricity bill and setup for a full financial breakdown including 25-year returns.
Estimates based on UK average irradiance (950 kWh/kWp/yr), electricity rate 27p/kWh, SEG export rate 15p/kWh. Battery self-consumption uplift ~15%. EV saving assumes 3,000 miles/yr charged at home with solar. System costs used for payback: 2kWp £4,000 · 3kWp £5,500 · 4kWp £7,000 · 5kWp £8,500 · 6kWp £10,000. Actual savings vary by location, roof pitch, shading and energy usage pattern. This calculator provides estimates only.
📅 Rates last verified: June 2026 · Electricity 27p/kWh · SEG 15p/kWh · Check current Ofgem rates →
Estimates only — not a quote. Get a real quote free →