Quality Factor

The quality factor (Q), also often called Performance Ratio, describes the relationship between the actual yield and the target yield of a photovoltaic system. 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 % (Q = 0.70). Another example is a Solar Module based on crystalline cells, which can even reach a quality factor of 0.85 to 0.95.

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