Life in Numbers · Popular calculator
Solar panel payback
Annual production, savings and simple payback time. Change only the numbers you know. Results update instantly and stay in this browser.
01 · A useful example is ready
A useful example is ready
03 · Every result explained
Every result explained
Each row says what the number represents. No hidden total: the editable starting values are listed beside it.
04 · What the estimate includes
What the estimate includes
The estimate includes yearly solar production, the part used at home, exported energy, local prices, installation cost and yearly maintenance.
ⓘ Planning estimate — not a quote, tariff or financial recommendation.Is simple payback a full investment model?
No. Finance, tax, inverter replacement, degradation and tariff changes can move the result.
What does annual yield mean?
It is generated kWh per installed kW in a typical year; local sunlight and roof orientation matter.
Optional partner services
Useful services — only if you need them
No pop-ups and no promises of easy money. Life in Numbers's calculators remain free.
Partner links: Life in Numbers may receive a reward if you use them. Your price does not increase.Everyday tools
Crypto services · 18+
Crypto can lose value. Check availability and rules in your country. This is advertising, not financial advice.
▶ YouTube · Free channels from the creators
Music, stories and creative experiments
If Life in Numbers helped, discover our YouTube projects or share this free calculator with someone.