Will solar pay off on your roof?
Enter your address and get honest numbers — payback, 25-year profit, incentives and home-value uplift — on real climate data. Free, no sign-up, no sales call.
Enter your address on the left and hit calculate. You'll get payback, lifetime profit, incentives, a 25-year cashflow and CO₂ savings — for your exact roof.
Solar calculator FAQ
Is solar worth it for my home?
It depends on your roof, your electricity price and local incentives. This calculator models all three from real climate data to give you an honest payback, lifetime profit (NPV) and return rate (IRR) — an estimate, not a sales quote.
How accurate is this calculator?
Generation uses PVGIS, the EU’s validated solar database, for your exact coordinates. Costs and tariffs use researched local averages. It’s a solid estimate; an installer’s site visit produces the exact figure.
Is it really free, with no sign-up?
Yes. The calculator is completely free and needs no account. You only share contact details if you choose to request quotes from installers.
Browse solar by location on our country & city guides.