Terms of service
Last updated: November 11, 2026
1. Acceptance of terms
By accessing and using SunYield Calc (the “Service”), you agree to these terms. If you do not agree with any part of them, stop using the Service.
2. Description of service
SunYield Calc is an open-source tool that provides estimates of solar photovoltaic energy production, weather forecasts, and financial returns on investment. Data is collected from third-party services, including Open-Meteo and PVGIS.
3. Estimates and disclaimer of warranties
SunYield Calc calculations, forecasts, and financial projections are estimates based on mathematical models and historical weather data. They are not professional engineering, electrical, or financial advice.
We do not guarantee the accuracy, reliability, or completeness of these projections. Actual production and financial returns depend on equipment, shading, wiring losses, local electricity rates, and weather.
4. Limitation of liability
SunYield Calc's developer is not liable for direct, indirect, incidental, consequential, or financial damages arising from using or being unable to use the Service. Before making an investment decision, you are responsible for checking the feasibility and financial viability of an installation with qualified professionals.
5. External links and advertising
SunYield Calc may link to third-party websites and display third-party ads, including Google AdSense. We do not endorse and are not responsible for the content, products, or privacy practices of external sites.
6. Changes to the service
We may modify or discontinue the Service, temporarily or permanently, in whole or in part, with or without notice.