Problem: The starting current briefly demands more than 2000W.
Solution: if more power is demanded, the device limits the output to 2000W, then to 1000W after a few seconds. Some loads with electric motor require very high starting currents for a very short time, then drop to lower consumption. Therefore, the current limitation of the device only affects the start-up phase of the consumer, which can lead to stuttering or out-of-round start-up.