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Performance Ratio (PR)

ratio of energy generated to total energy incident on pv system. PR is the global efficieny of the whole system. PR is composed of the efficiencies of system components (inverter, cables, meter, etc.) on the one hand and changed module efficiency due to dviation of insolation or temperature from standard testing conditions on the other hand. Additionally, losses due to shading and angular denpendence are accounted for.

Last page update: 18.02.2011