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PV arrays need to be mounted on a strong and durable structure that supports the array and can withstand decades of wind, rain, hail, and corrosion. These structures tilt the PV array at a fixed angle determined by the latitude of the area, the orientation of the structure, and the requirements of the electrical load. To achieve the highest annual energy yield, the module is oriented just south of the Northern Hemisphere and tilted at an angle corresponding to the latitude of the region. Rack mounts are currently the most popular method due to their robustness, versatility, and ease of construction and installation. More sophisticated and cheaper methods continue to be developed.

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