Privacy Policy

1) What we collect

We aim to collect as little information as possible.

Information you enter

The calculator may ask for inputs such as annual electricity usage (kWh), system size, home type, and optional assumption settings (e.g., self-consumption rate, performance ratio, tariff assumptions). These inputs are used only to generate your estimate.

Automatically collected technical information

Like most websites, our hosting provider may receive basic technical data when you visit, such as your IP address, browser type, device information, and approximate location derived from IP. This data is typically used for security, performance, and basic site operations.

Local storage on your device (optional)

To improve usability, we may store your most recent inputs or preferences locally in your browser (e.g., via local storage or session storage). This information stays on your device and is not intended to identify you.

2) What we do NOT collect

• We do not require account registration.
• We do not ask for your name, email, phone number, electricity account login, or precise street address.
• We do not knowingly collect sensitive personal information.

3) How we use information

We use information to:

• Calculate and display your savings and payback estimates.
• Remember your inputs on your device (if local storage is enabled by your browser).
• Maintain and improve the website (e.g., debugging, performance, security).

4) Analytics and advertising (if applicable)

We may use privacy-friendly analytics or advertising services in the future. Analytics: If enabled, analytics may collect aggregated usage information (e.g., pages viewed, approximate region, device type) to help us improve the site. Ads: If enabled, third-party ad networks (such as Google AdSense) may use cookies or similar technologies to show ads and measure performance. When such services are enabled, we will update this Privacy Policy and provide any required notices and choices.

5) Sharing of information

We do not sell your personal information. We may share information only: with service providers who help operate the website (e.g., hosting, security), and only to the extent necessary; and if required by law, regulation, legal process, or to protect rights and safety.

6) Data retention

Calculator inputs stored in your browser remain until you clear your browser storage. Server-side logs (if any) are retained according to our hosting/security needs and are typically kept for a limited period.

7) Your choices

You can:

• Clear local data via your browser settings (site data / cookies / local storage).
• Use private browsing to avoid storing data on your device.
• Contact us to ask questions about this policy.

8) Children

This service is not intended for children under 16, and we do not knowingly collect personal information from children.

9) Changes to this policy

We may update this Privacy Policy from time to time. We will update the "Effective date" above and post the revised version on this page.