After a few hours in the sun, a solar panel can feel hot to the touch. The fuel is sunlight, but the heat it brings with it quietly erodes the panel’s output. Engineers cannot overlook that heat penalty in a country like the United Arab Emirates, where rooftops and desert solar farms bake for most of the year. Usable space is also limited, especially on rooftops, and cooling devices that waste energy or water can quickly offset any savings.
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