Find the rooftop solar system size and number of panels for your monthly units, the roof space needed, yearly savings and payback time.
loading toolHow to use the solar panel calculator
- Type your numbers in the boxes (pick your currency or units if asked).
- The answer updates as you type: no button to press.
- Copy the result, or share it on WhatsApp with one tap.
Questions
How long do solar panels last?
About 25 years, with output slowly falling to around 80% by then.
Is my data private?
Yes. Everything happens inside your own browser: nothing you type or choose is uploaded to us or anyone else.
Is it free?
Completely free, with no sign-up, no watermark and no limit on how many times you use it. Light ads keep the site running.
