Size your solar system in 2 minutes
Find your home, draw the roof on the aerial photo and instantly see how many panels fit, how much they will produce and how much you can save.
- Official IGN aerial imagery
- Production calculated with PVGIS (European Commission)
- Instant savings and grants
- 1Your profile
- 2Your roof
- 3Your usage
- 4Result
Draw your roof
- Search for your address and zoom in until you can see your roof clearly.
- Click “Draw roof” and mark the corners. Close the shape by clicking the first point.
- If your roof has several slopes, draw each one separately with “Add another roof”, choose which way it faces and tick it if it gets shade.
Click each corner and finish on the first point
Aerial imagery © Instituto Geográfico Nacional (PNOA) · Plots © Dirección General del Catastro · Addresses: CartoCiudad (IGN) · Production: PVGIS © European Commission · Leaflet
Draw at least one roof area to continue.
How much is your electricity bill?
Your solar study
Estimate based on your roof, your usage and the real solar radiation at your location.
Indicative, non-binding estimate. The final quote requires a site survey (roof condition, shading, electrics and permits).
Study sent!
We work with leading manufacturers
- FroniusCertified installer
- TeslaCertified installer
- Enphase
Brands mentioned are trademarks of their respective owners.
Frequently asked questions
How reliable is the online calculation?
It uses the real solar radiation at your location (PVGIS, European Commission) and the area you draw. It is a solid first estimate; the final quote is adjusted after the site survey.
What happens to the data I enter?
It is only stored if you choose to send us the study to receive a detailed quote. The on-screen calculation does not store personal data.
Does the study give me the price of the installation?
It shows how many panels fit, how much they will produce, how much you can save and which grants apply to you. The price depends on the roof, the inverter and your electrics, so we give you a fixed written price after the free site survey, together with the IBI/ICIO rebates that apply.