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Solar tools

Solar tools, calculate the position of the sun at one point on the earth, sunrise sunset.

Sun Position

Calculation of sun’s position in the sky for each location on the earth at any time of day. Azimuth, sunrise sunset noon, daylight and graphs of the solar path.   

Photovoltaic payback

Economic analysis of a photovoltaic system, with the determination of payback and chart.   

Photovoltaic FAQ

This section lists the FAQ (Frequently Asked Questions) on photovoltaic systems and in general the sources of renewable energy.   


Sunrise Sunset Calendar

Calendar of sunrise sunset noon daylight of the sun at any location on the planet for an entire year. The table shows the time and azimuth in degrees.   

Build a sundial

Here you can building your sundial in a few minutes, get coordinates, declination and the dimension.