Collection of tools to know and work with solar energy. Calculation of: sun position, latitude longitude coordinates, photovoltaic systems, emissions CO2.

Photovoltaic payback

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

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.   

CO2 Emissions

Measure emissiones of CO2 per kWh of energy produced, or emissions in g/km of your car. Enter the kWh produced by a year the nation’s electricity mix.   

Unit of measure converter

Units measurement conversion: Length Area Volume Mass Force Power Energy Time Temperature Angle Speed Flow Acceleration Pressure Electrical Luminance ...   

Measure on Map

Measure on google map: latitude longitude coordinates DD DMS, address and location, distance (km, meters, mile, foot), area, poliline, circle, perimeter.   


Drag the marker on map to calculate distance (km, meters, mile, foot) and bearing angle of direction on google map, between two points of the earth. Calculation of average speed or time spent.   

Coordinates conversion

Conversions latitude longitude geographic coordinates, in all formats: decimal, sexagesimal, GPS DD DM DMS degrees minutes seconds, search by clicking on map.   

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.   

GPS trace

Manage GPS tracklog and waypoints, view file GPX, KML, TCX or CSV on map, on line free tool   

Photovoltaic FAQ

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

Reported by:   TOP100-SOLAR