Should the solar panels of solar street lights be cleaned frequently?

Solar panels shall not be covered with heavy dust or sand, which will reduce the efficiency of the solar panels to absorb sunlight. But in general, the solar panels are required to be cleaned very often, because when it rains, it will wash away the dust and sand. If it does not rain for a long time, it needs to clean the solar panels of the solar street lights every 2-4 months according to the dust situation.

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