Why Is PV Mounted On An Angle?
• Reason 1: Keeping modules in the sun The more sunlight modules collect, the more electricity they produce. In the northern hemisphere, the sun moves across the sky at an angle to the earth and dramatically changes position in the sky between summer and winter. Flat-mounted PV modules lose much of the sunlight they could potentially collect because it reaches the panels at a sharp angle, bouncing off the glass surface. • Reason 2: Keeping modules cool PV modules generate electricity from light, not heat; in fact, heat reduces electric production because of resistance. In the same way that a computer has fans to cool the silicon chips, solar modules in a tilted position allow for cool air to flow across their front and back surfaces. Heat gain from the sun is radiated from the front and back of a tilted module, cooling the panel, lowering resistance and raising productivity. • Reason 3: Keeping modules clean Dust in the air gathers on PV modules just like it does on a car. The fine coa
