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Coordinates Basics, How to Align Solar Panels Toward the Sun, Two

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The geographical coordinates system is a tool to locate any point or city on earth surface, as as explained before a complete circle around the earth has 360 degree and each degree is divided in 60 minutes and each minute in 60 seconds, The parallels of latitude are referenced to the Equator which is at 0o or at the origin, the extremes are at the North Pole at +90O or 90oN and the South Pole at -90o or 90os since the distance from the Equator could be the same, always the direction north (N) or south (S) must be specified.


The latitude lines or meridians have as reference the Greenwich meridian or prime meridian at 0o, longitude is always measured in referenced to the prime meridian west or east from cero to 180o.

Longitude  must  specify a direction west o east from the prime meridian, example 20OW.


Each angular coordinate has a corresponding  linear distance from the reference point, the approximate values are:


One degree of latitude is approximately 111 kilometers, one minute (‘) is 111/60 = 1.85 kilometers and one second (“0) is about 111 /3600 = is about 30.8 meters at or near the equator As example a point located at latitude 1oN will be at somewhere 1 X 111 = 111 kilometers north of the equator, buts as the latitude circles are closer to the Equator one degree will represent proportionally less distance, if the longitude coordinates is 6oW, the point location will be at 666 kilometers west of the Greenwich meridian, therefore the location of our point is latitude (1o,0’,0”)N  and longitude (6o,0’,0”) W. This point is in the Atlantic Ocean near Africa.  


OK now, how I optimally align my solar panel toward the sun?


The best productivity is achieved by aligning the module in perpendicular direction to the sun at noon, one way to achieve the best position for the year around due to the sun seasonal direction changes is by given your panel a tilting angle equal to your latitude in degrees -15o in summer, for winter the angle must your latitude in degrees +15o, be sure that your ground is leveled.


Your Latitude Angle

-15O    For Summer


+15O   For Winter