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How much sunlight (solar window) in hours per day do i need?

April 26, 2017hours solar Sunlight window

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How much sunlight (solar window) in hours per day do i need?

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You only need the middle six hours of the day for solar pool heating. In fact, 90% of your solar radiation will fall in a four hour period. For example, if your collectors are facing South on a flat surface or north roof, 90% of your solar radiation will fall from 10:00 AM to 2:00 PM; East, 90% from 9:00 am to 1:00 pm; and West, 90% between 11:00 am and 3:00 pm.