Terms of use

Terms revised September 24, 2026.

1. Agreement

By accessing Solar Payback Calculator (the "Site"), you agree to these Terms of Use. If you do not agree, do not use the Site.

2. Use of the Site

The Site is a free educational utility provided by Nathan Management (Andrew James Flores), California. You may use the Site for personal, non-commercial research purposes. You may not scrape, mirror, or republish material from the Site at scale without prior written permission.

3. No professional advice

Information on the Site, including all calculator outputs, state pages, and guide articles, is provided for general informational purposes only. It is not financial, tax, legal, engineering, or installation advice. Solar payback depends on factors specific to your home, utility, roof, financing, and applicable law that this Site cannot fully model. Consult a licensed installer, a tax professional, and your utility before making any purchase decision.

4. Estimate-only disclaimer

Calculator results and worked scenarios are estimates, not quotes, guarantees or commitments. Sourced historical prices and stated tariff terms are distinct from model assumptions and can change. Actual results vary. See the full disclaimer for additional detail.

5. Third-party content and links

The Site links to third-party resources including EIA, IRS and utility commissions. The Site loads Google advertising code and may display third-party advertising served by Google; an ad may not appear on every visit. See the privacy policy for how Google may process data and for your choices. The Site does not endorse or control third-party content or services. Any interaction with an advertiser is between you and the advertiser.

6. Intellectual property

Original copy, code, and design on the Site are © Nathan Management, all rights reserved. Third-party materials have their own applicable terms. Source attribution is not a grant of rights to republish those materials.

7. Limitation of liability

To the maximum extent permitted by law, Nathan Management and Andrew James Flores are not liable for any direct, indirect, incidental, consequential, or punitive damages arising from your use of the Site or reliance on any information provided here. The Site is provided "as is" and "as available," without warranties of any kind, express or implied.

8. Governing law

These Terms are governed by the laws of the State of California, without regard to its conflict-of-law principles. Any dispute will be resolved in the state or federal courts located in Los Angeles County, California.

9. Changes

We may update these Terms from time to time. Continued use of the Site after a posted update constitutes acceptance of the revised Terms.

10. Contact

Questions about these Terms: hello@nathanmanagement.pro.