From what i know about inverter that the compressor always started at a low speed rotation and the current consumption start at 1.2A and starting to rise until 4.2 A and stop as the room already cold enough.

Once the temp rises , the compressor kick in again but also at 1.2A all over again.

Standard air con started at 4.2 A from the beggining, hence the higher power consumption..

Thanks
regards
kevin