What is the Module Maximum Power Current (IMP)?
This is the current that the panel produces when exposed to sunlight and a complete circuit with a load impedance is attached in such a way that power produced by the panel is maximum. This current is determined using the Standard Test Conditions, and like the Short Circuit Current is subject to change based on the temperature. The Maximum Power Current is affected by temperature in the same way as the Short Circuit Current. (Taken from SMA-America ’07).