Privacy
The calculation stays in your browser. Your device location is requested only after you press Use my location; no search or coordinates are sent to an external API.
Privacy by design
- 01
This service is free and loads no advertising or ad networks.
- 02
The data is processed in the browser and is not sent to Chapa Lab.
- 03
The language preference is stored in localStorage and may persist across sessions. Remove it by clearing this site's data in your browser.
- 04
Calculation inputs remain in this page's memory. Reloading restores the initial values.
Your data stays on this device
Location, installation and consumption
The calculation stays in your browser. Your device location is requested only after you press Use my location; no search or coordinates are sent to an external API.
- Your inputs
- Latitude · Average monthly consumption · Electricity purchase price · Contracted power · Fixed power charge · Maximum installed power
- What you do
- The calculation stays in your browser. Your device location is requested only after you press Use my location; no search or coordinates are sent to an external API.
- What you get
- Calculation inputs remain in this page's memory. Reloading restores the initial values.
- FREE · NO ADS
- This service is free and loads no advertising or ad networks.
Responsible scope
Sources and scope
This is a guidance estimate by latitude and climate band, not a quote or engineering study. It does not know the exact roof geometry, shading or weather.