The prepaid energy meter consists of two main functions: one is the energy metering part, which uses the integrated energy metering chip to calculate the sampling signal of voltage and current, thereby generating the metering pulse representing the electric energy and directly using it for energy error verification, and then counts the electric energy to the functional processing part of the MCU;The second part is the MCU control part of the microprocessor. It calculates the electric energy according to the electric energy pulse of the metering part, and exchanges the data through the radio frequency card interface. At the same time, it uses an LCD with a wide temperature range for display, and controls the magnetic holding relay according to the set parameters to control the user's power consumption.Acrel’s ADL Series prepaid energy meter solutions are designed to help consumers monitor their electricity usage and manage their expenses more effectively.