What is the efficiency of solar panel with size in?
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In practical terms, for two solar panels of the same physical size, if one has a 21% efficiency rating and the other has a 14% efficiency rating, the 21% efficient panel will produce 50% more kilowatt hours (kWh) of electricity under the same conditions as the 14% efficient panel.
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Solar panel is made up of many solar cells
I don't know about size
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