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Founded in 1979, Solar Oregon is a 501 (c) (3) non-profit membership organization providing public education and community outreach to encourage Oregonians to choose solar energy.
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What happens if the solar panels are shaded?

Solar Electric panels should be installed in areas where they get significant shade-free sun every day. Even small amounts of shade can significantly reduce the output.

 

 

Photovoltaic panels are more sensitive to the angle and intensity of light striking them than solar hot water panels are, but the most serious impact to PV performance is partial shading. Solar cells on a panel are strung together in series, like links in a chain. If a shadow falls on one cell, or link, the chain is broken and output of the entire panel is seriously degraded.

 

Solar Electric panels should be installed in areas where they get significant shade-free sun every day. Even small amounts of shade can significantly reduce the output.

 

These images show the impact of adjusting an adjacent row of PV panels so they do not cast a shadow along the bottom of the first row.

 PV ShadowPV no shadow

 

 PV Shadow Graph

 
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