The AS044 – Single phase energy meter demo uses RL78/I1C -Ultra-low Power Microcontrollers for High-end Smart Electricity Meter which consists of a 10W isolated multi-channel AC-DC flyback converter, which has a special requirement to pass the magnetic tampering using an iron dust core and can operate at 450V AC. Users can set various AC input and load conditions to measure the error percentage with a Smart DLMS based 1-phase energy meter solution, where communication with the meter through DLMS can also be observed.