Terms of Service
Effective Date: March 11, 2025
Important: All outputs from this tool are estimates only. They are not a substitute for a professional solar assessment, engineering evaluation, or financial advice. Do not make purchasing or investment decisions based solely on these results.
Please read these Terms of Service ("Terms") carefully before using sun-calc.com (the "Site"). By accessing or using the Site, you agree to be bound by these Terms. If you do not agree, do not use the Site.
All calculations, projections, and outputs provided by this Site — including but not limited to energy production estimates, system costs, annual savings, payback periods, and return on investment figures — are rough estimates for informational purposes only. Results are based on publicly available data sources and simplified models that cannot account for all variables affecting real-world solar performance.
Factors not captured by this tool include, but are not limited to: shading from trees, neighboring structures, or obstructions; local permitting and interconnection costs; utility rate structures, net metering policies, and time-of-use pricing; roof condition, age, and structural suitability; local installer labor costs; state and local incentives or rebates; equipment warranties and actual degradation rates; and site-specific weather anomalies.
You should obtain quotes from licensed solar installers and consult qualified financial and tax advisors before making any decisions.
Nothing on this Site constitutes professional engineering, financial, legal, or tax advice. The Site does not establish any professional-client relationship between you and us.
THE SITE AND ALL CONTENT ARE PROVIDED "AS IS" AND "AS AVAILABLE" WITHOUT WARRANTIES OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND NON-INFRINGEMENT. WE DO NOT WARRANT THAT THE SITE WILL BE UNINTERRUPTED, ERROR-FREE, OR THAT ANY RESULTS OBTAINED WILL BE ACCURATE OR RELIABLE.
We make no representations about the accuracy, completeness, or timeliness of data returned by third-party APIs (Google Solar API, NREL PVWatts, or any other data source). Data availability and accuracy vary by location and are outside our control.
TO THE FULLEST EXTENT PERMITTED BY APPLICABLE LAW, IN NO EVENT SHALL WE BE LIABLE FOR ANY INDIRECT, INCIDENTAL, SPECIAL, CONSEQUENTIAL, PUNITIVE, OR EXEMPLARY DAMAGES ARISING OUT OF OR RELATED TO YOUR USE OF OR INABILITY TO USE THE SITE, INCLUDING BUT NOT LIMITED TO:
OUR TOTAL LIABILITY TO YOU FOR ALL CLAIMS ARISING FROM YOUR USE OF THE SITE SHALL NOT EXCEED ONE U.S. DOLLAR ($1.00).
This Site uses third-party APIs to retrieve data. Your use of this Site is also subject to the terms of service of those providers:
We are not responsible for the availability, accuracy, or terms of those services.
You agree not to use this Site to: