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How It's Made Solar Power Articles What's a Solar Panel? RV Solar Panel Kits What is solar power? Photovoltaics (PV) It is important for proper solar power system operation that the array be oriented true South (if you are located in the northern hemisphere). The directions of magnetic South and true South differ from one another depending on geographic location. This variance is called declination. Check the declination for your region in order to extrapolate true South from a compass heading of magnetic South. The map below shows the magnetic declination for the US. For example, true south in central Texas falls between the 7 degree East and the 8 degree East lines. This means that, for optimum exposure, the solar array should be aligned 7-8 degrees east of magnetic south (on a compass). Click HERE to view the solar array orientation map below.
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