Performance Ratio

Within the realm of Photovoltaics, the term “performance ratio” refers to the relationship between actual yield and target yield. The performance ratio of a photovoltaic system is the quotient of alternating current (AC) yield and the nominal yield of the generator’s direct current (DC). It indicates which portion of the generated current can actually be used. A photovoltaic system with a high Efficiency can achieve a performance ratio over 70 %. The performance ratio is also often called the Quality Factor (Q). A Solar Module based on crystalline cells can even reach a quality factor of 0.85 to 0.95 (performance ratio = 85 - 95 %).

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