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Cleaning it's something few people comment about solar panels. And a company created a semi automatic device to help clean panels in solar farms.
Well, how often and how exactly do you clean your solar panel ?
Is that risk, depending of the roof ?
Can it be, in some cases, like "self clean", if the clime in a given place has low dust and good rains along the year ?
People always said Sahara desert could supply energy for the entire planet, if a few percentage of it would be used for solar farms. But I imagined how would they find water to clean 15 billion solar panels or more in a clime with sandstorm.
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