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Privacy policy

Last updated: November 11, 2026

1. Information we collect

SunYield Calc is designed with privacy as a priority. You do not need an account, and we do not collect personally identifiable information such as your name or email address.

  • Location data: To calculate solar forecasts, we process latitude and longitude coordinates. They are sent securely to third-party weather services and are not linked to your identity.
  • Configuration data: Your system settings, including panel capacity, energy costs, and angles, are saved locally on your device. We do not store them on our servers.

2. Cookies and tracking technologies

We use cookies and similar technologies to support advertising and analyze site traffic.

  • Essential cookies: Used to save your app preferences locally.
  • Advertising cookies (Google AdSense): Third-party vendors, including Google, may use cookies to show ads based on visits to this or other websites. Google's advertising cookies allow it and its partners to show ads based on browsing history.

You can opt out of personalized advertising in Google Ads Settings.

3. Third-party services

External services provide some of the site's core features:

  • Open-Meteo and PVGIS: Used for weather and solar irradiance data. Your coordinates are sent to these services without your name or account details.
  • Google AdSense: Used to support the site with advertising. AdSense may collect IP addresses and browser information to select relevant ads.

4. Your GDPR rights

If you live in the European Economic Area (EEA), you have the right to:

  • Access, update, or delete your personal data. You can clear SunYield Calc data by clearing this site's local storage in your browser.
  • Withdraw consent for advertising cookies using the cookie consent banner.

5. Contact

If you have questions about this privacy policy, contact the developer on GitHub: @ghadighanem27-bit.