How to choose an energy meter for a charging pile?

What is electric vehicle charger metering?

Electric vehicle charger metering refers to the electric energy metering of an electric vehicle charging station (EVSE) during the charging process, which ensures the accuracy and reliability of the electric energy metering data. As an important part of electric vehicle charger metering, electric vehicle charging piles must be equipped with electric energy meters that meet national metering standards. Usually, an AC or DC charging meter is set inside the electric vehicle charging pile.

It monitors and measures the energy and power consumption of each charging gun in real time.

How does EV charging metering work?

In an EV charging system, the EV charging station communicates with the vehicle's battery management system (BMS) to convert the three-phase AC input into the DC output required by the BMS. A DC energy meter is connected to the DC bus to measure the output power. The charging management controller reads the data on the DC energy meter and controls the DC output power. Smart meters for EV chargers can be configured to measure charging power through shunts or Hall sensors.

The DC energy meter can read user information through the RS485 communication interface and monitor the charging status according to user needs. The energy detection software can intuitively display the voltage, current, power and other important charging data of the electric vehicle, making it easy to query various data and record them.

How to choose an energy meter for a charging pile?

Choose a suitable energy meter

When choosing an electric meter for a charging pile, it is necessary to make a reasonable choice based on parameters such as its charging power and working time. The charging power of most charging piles is between 3kW and 50kW, so it is more appropriate to choose an electric meter with a rated current of about 100A.

Ensure the accuracy of the electric meter

In order to ensure the fairness of electricity consumption of charging piles, the accuracy of the electric meter is very important. When purchasing an electric meter, check its accuracy level and whether it meets the national mandatory verification standards. At the same time, the electric meter should be inspected and maintained regularly to ensure that its measurement data is correct and reliable.

Design a power distribution plan based on actual conditions

When installing a charging pile, it is necessary to design a power distribution plan based on actual conditions. According to the total power and number of charging piles, the line load, safety and economy should be comprehensively considered to select appropriate electrical components such as lines, protectors, switches, etc., and construction and acceptance should be carried out in accordance with relevant national standards and specifications. Choosing a suitable meter is very important for the fairness of electricity consumption of charging piles. It is necessary to make a reasonable choice based on the parameters of the charging pile and pay attention to the accuracy of the meter to ensure accurate calculation and fair collection of charging fees.

The EV series meters produced by IVY METERING support bidirectional metering, can read meter data in real time through RS485 communication, support multiple rates and multiple time periods, and include both AC and DC scenarios.