4 Digit Ampere Hour Meter is functional as an electronic device that is used to measure the total electric charge which move through the circuit. It is useful for battery charging as well as electroplating purposes. This device is made to control the rectifier and is featured with 4-digit displays that displays the amount of current and charge. With its use, there is no need to add some extra ammeters in the circuit. It has a Modbus interface that allows for remote control as well as punctual monitoring.