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What is the Module Temperature Coefficient of Voltage (VKvoc)?

April 26, 2017coefficient module temperature voltage

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What is the Module Temperature Coefficient of Voltage (VKvoc)?

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In order to determine how much the panel’s output voltage is affected by changes in temperature, we need to know the Temperature Coefficient of Voltage. The magnitude of the coefficient is used in the String Sizing Calculations to determine how much, or how little, changes in temperature will affect the panels. For the maximum input voltage calculation, the Temperature Coefficient of Voltage is used with the low temperature to determine the maximum number of panels that can be used in a string. For the minimum input voltage calculation, the coefficient of voltage is used with the high temperature to determine the minimum number of panels that should be used. Any configuration between these two extremes can be used as long as they do not exceed the maximum current or maximum power input thresholds. (Taken from SMA-America ’07).