SunCalculator
SunCalculator
SunCalculator is a simulation tool for computing the angular and spectral distribution of direct and diffuse solar radiation for a given location, time period, and collector geometry. It is designed for applications that require direction-resolved irradiance data, such as ray-tracing simulations, optical system modelling, and photovoltaic performance analysis.
The software combines measured or modelled integral irradiance data with a pre-calculated SMARTS spectral database to generate angularly resolved radiation fields over the celestial hemisphere or in panel-based coordinate systems.
A detailed description of the underlying methodology and validation examples is provided in the reference below.
| Download | References |
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New release 19/12/2025! |
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| M. Ernst, H. Holst, M. Winter, and P. P. Altermatt, “SUNCALCULATOR: A program to calculate the angular and spectral distribution of direct and diffuse solar radiation,” Sol. Energy Mater. Sol. Cells 157, 913–922 (2016), http://dx.doi.org/10.1016/j.solmat.2016.08.008. |
Fri Dec 19, 2025
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