What is the Module Temperature Coefficient of Current (IKimp)?
In order to determine how much the panel’s output current is effected by changes in temperature, we need to know the Temperature Coefficient of Current. Like the Coefficient of Voltage, the magnitude of the Coefficient of Current represents how much, or how little, changes in temperature will affect the performance of the panels. You will notice that the Coefficient of Current is typically much smaller than the Coefficient of Voltage, usually between 10 and 100 times smaller. The Temperature Coefficient of Current is used with the highest temperature selected to determine the maximum number of strings that can be paralleled into the inverter. Each string must have the same number of panels. As long as that number fits within the voltage window specified by the minimum and maximum input voltages, this should result in a system that will function well. (Taken from SMA-America ’07.
