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
There is no account or analytics. Google AdSense remains blocked until you accept advertising.
- 02
The data is processed in the browser and is not sent to Chapa Lab.
- 03
Language preferences remain only during the session.
- 04
Downloads are generated on the device under the user's control.
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
- Downloads are generated on the device under the user's control.
- You choose advertising
- We use only necessary storage to remember your choice. Google AdSense loads only if you accept advertising.
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.