AC/DC Energy Meter in EV Charger Project-Spain

Charging pile industry information

Electric vehicle charging current: What is the difference between AC and DC?
Electric cars can run on two types of "fuel." They are called alternating current (AC) and direct current (DC).
Electricity from the grid is always alternating current. However, batteries, such as those in your electric car, can only store electrical energy as direct current. This is why most electronic devices have built-in converters in their plugs. You may not realize that every time you charge a device like your smartphone, the plug actually converts alternating current to direct current.


Electric vehicle AC charging:

The converter is built into the car. Although it's actually a converter, it's called a "car charger."
The power is converted from alternating current to direct current, which is then fed into the car battery.
This is the most common way to charge electric vehicles today, with most chargers using AC power.

Scope of application: home/business/company


Acrel Products (RS485 Modbus-RTU) :
The ADL10-E is small in size and low in price
ADL200N-CT MID in use, small size
ADL400N-CT MID in use, small size
ADL3000-E-A UL

Electric vehicle DC charging:

Unlike AC chargers, DC chargers have converters themselves. This means that it can power the car battery directly, without the need for an on-board charger for conversion. In the case of electric vehicles, DC charging is faster.

Scope of application: Highway/public charging station



Acrel Products (RS485 Modbus-RTU) :



Use the shunt to be more accurate




Charging plug


There are two types of AC plugs:
Type 1 is a single-phase plug that is standard for electric vehicles in the United States and Asia. It allows you to charge your car at speeds of up to 7.4kW, depending on your car's charging power and grid capacity.
Type 2 is a three-phase plug, which is standard in Europe because they have three additional wires to let the current through. So naturally, they can charge your car faster. At home, the maximum charging power is 22 kW, while public charging stations can charge up to 43 kW, again depending on the charging power of your car and the capacity of the grid.
There are two types of DC plugs:
CHAdeMO: This fast charging system was developed in Japan and enables very high charging capacity and two-way charging. Currently, Asian automakers are leading the way in offering electric vehicles that are compatible with CHAdeMO plugs. It allows charging up to 100 kW.
CCS: The CCS plug is an enhanced version of the Type 2 plug with two additional power contacts for fast charging. It supports AC and DC charging. It allows charging at speeds of up to 350 kW.



1. Power quality analyzer is configured in the total incoming circuit: the power quality of the entire charging pile power supply circuit is monitored, and the leakage current monitoring device is set.

2. The three-phase main circuit is configured with residual current relay: provides shock protection for indirect contact.
3. The three-phase AC circuit is configured with guideway energy meter: Since such charging pile consumes large power, it is used to measure total electric energy, and monitors the operating efficiency of the entire charging station with DC energy meter.
4. Dc electric energy meter installed inside the DC charging pile: used to measure the energy used for charging electric vehicles.
5. Charge management controller: responsible for external man-machine interface, charge control, 485 reading DC energy meter power data, control DC charging output circuit breaker opening and closing.
6. Dc charging pile insulation detection module



Related Acrel Products

DJSF1352-RN rail-mounted DC power meter

● Measurement: kWh, kVarh, Power, Current, Voltage and etc

● Current Rating: Shunt 0-75mV; Hall sensor 0-20mA,4-20mA,0-5 V,0-10V

 Voltage Rating: 0~1000V DC

● Application: DC Battery; Charging Pile; Solar PV and etc

● Communication: DL/T645-2007 Protocol, MODBUS-RTU Protocol

 Power Supply: 85~265V AC/DC; 24V(±10%) DC; 48V(±10%) DC

 Pulse Input: One Second pulse output, one electric energy pulse output

● Display: 8 Digital Segment type LCD



ADL400 Three phase energy meter

 Rated Voltage: AC3*220/380V

 Input Current: 3*10(80)A, 3*1(6)A(By CTs access)

 Communication: RS485(Modbus-Rtu)

 Accuracy: kWh Class 0.5

 Display Method: LCD Display

 Installation: DIN 35MM


ADL200 Single phase energy meter

● Measurement: 1-phase AC kWh, Active Power, Current, Voltage and etc
● Accuracy: 1.0% (kWh)
● Frequency: 45~65Hz
● Rated Voltage: 220~264Vac (direct connect)
● Rated Current: 10(80)A AC (direct connect)
● Communication: RS485 (MODBUS-RTU)
● Multi-rate/tariff: 4 Tariff Rates and etc

Post time: Mar-12-2024