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Submission creator avatar Ben Damiani
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  Photovoltaics (PV)
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title
Old Xmas lights. 20% shade cell 20% Syst decrease
short description
Solar cells, modules, and systems are commonly connected in series. 1 cell may impact entire system. 20% shade one cell, 20% system loss.
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Full Description
Solar cells, modules, and systems commonly have a series connection. A leaf, bird droppings, or other shading of one cell may significantly limit the system performance. Consider a 20% shadow on one cell that does not trigger the bypass diode in the module. A 1000 volt inverter string may have 28 panels and supply 9 kW's. The 20% shadow on one cell may result in 1.8 kW's of lost power even though only 1 watt is impacted on the solar cell.

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