Terms of use
Last updated:
By using Solar Payback Calculator, you agree to these terms.
Estimates only
Results are estimates based on the figures you enter and on published data that may have changed since we last checked it. They are not quotes, offers or guarantees, and they are not financial, legal, engineering or other professional advice. Before making a decision, get written quotes and check the details with a qualified provider.
Data accuracy
We link every data point to its source and show when we last checked it (see the methodology). We work to keep figures current but cannot promise they are complete, accurate or up to date.
No warranty
The site is provided as it is, without warranties of any kind, to the extent permitted by law.
Limitation of liability
To the extent permitted by law, we are not liable for any loss arising from your use of the site or reliance on its results. Nothing in these terms limits liability that cannot be limited by law.
Links and ads
The site may link to other websites and show third-party ads. We do not control and are not responsible for their content or offers.
Solar estimates
Solar output depends on your roof’s angle, direction and shading, the equipment installed and the weather in any given year. The calculator uses typical-year figures for a standard roof and cannot see your home, so its results are not a site survey, a design or a performance promise. Ask your installer for an estimate based on your own roof, and check what their quote and warranties cover.
Electricity prices and the rules for paying for exported electricity change over time and vary by provider. The calculator’s yearly price change is a scenario you choose, not a forecast.
Changes
We may update these terms. The date above shows when they last changed.