Keeping your solar panels clean is essential to getting the most out of them. Dirty panels will not absorb the solar rays as well as clean panels will. It seems to be common sense to keep them clean, but many people assume that the rain will clean them. But they still need a thorough cleaning to keep them in optimum condition.
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Know how light mixes with the trees around your property. You may think you've got the perfect spot for a solar panel, but watch it throughout the day. The sun coming in from different angles may lead to surprising shadows from trees and foliage. This will affect your solar output.