Thank you for your question and Id like to apolgize for the late response. Solar power plants are like any other power plants and each component has to be engineered and sized appropriately. Solar power plants can some time run in as much as 30% lesser generation due to losses at different stages.
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i m not an expert in this field but i learned it from internet that the efficiency of the panels can reduced if dust gets accumulated or if panels temperature get increased…..keeping your solar panel clean and within the permitted range of temperature will help you to maximize your efficiency ….and also avoid shadding of solar panels it will damage the panels thus reducing efficiency….hope it helps