The Easee Equalizer registers the energy consumption directly at the power consumption in the building and transmits this data to the chargers on site. This signals to them how much current may be drawn to charge the e-vehicle. This prevents overloading of the main fuse and makes dynamic load balancing between the circuits at the charging location possible.
For single circuits, which can be single family houses, for example, the Equalizer only needs to be connected to the P1 port of the digital electricity meter and then configured.
At larger charging locations with several circuits and without an electricity meter, the procedure is somewhat more complicated, so we have summarised important installation facts for you here.
The Easee Equalizer kit
To install the Equalizer at a charging site with multiple circuits, several components are needed to read, analyse and transmit consumption data across circuits. The Equalizer kit contains all the essential components needed.
The installation sketches shown here represent the setup and wiring of the components for the network types TN 3-phase 400 V and IT 3-phase 230 V.
Use one of the connection diagrams shown here to connect the electricity meter in a suitable grid system.
- Mount the power meter and the power supply unit on a DIN rail in the fuse cabinet.
The power supply unit provides the Equalizer with 24V DC operating current.
- Connect the operating current terminals to the power meter. This circuit can also be used for the 24 V power supply.
We recommend setting the power meter to a separate fuse of maximum 10 A.
- Connect wires 1 and 2 to the 24 V outputs of the power supply unit and lead them to the terminals V+ and V- of the Modbus adapter.
- Connect the phase and neutral conductors (PE in the case of IT mains) for voltage measurement to the terminals of the power meter.
- Connect the wires of the current sensor(s) to the current measurement terminals.
- Fit a sensor around each conductor either in front of or behind the main fuse in the fuse box. Make sure that the sensors are connected correctly: The marked arrows on the sensors must follow the current direction from the current draw to the charging point.
Current sensors are electrical components with which the current intensity in cables and busbars can be measured (without contact). Both CT terminals and Rogowski coils can be used. Some types of Rogowski coils require an amplifier between the sensors and the power meter.
- Connect the wires to the terminals marked A+, B- and S to the terminals A, B and G of the Modbus adapter.
- Make sure that the electricity meter is correctly configured for the electricity grid at the site.
- Connect the Modbus adapter to the Equalizer. It is important to place the Equalizer within the coverage area of the Wi-Fi network used by the site.
Configuration of the Equalizer
To configure the Equalizer at a site with multiple circuits, the Easee Installer app must be used. Make sure that the Equalizer and the master unit for each circuit are connected to the same Wi-Fi network. Also check if NFC (Near Field Communication) is enabled on your mobile phone.
Use the Installer app
- Go to Update existing site and select the desired location.
- Press Add Equalizer.
- Enter the Wi-Fi information for the network the Equalizer and charging robots are connected to.
- Hold the front of the Equalizer to your mobile phone to transmit the Wi-Fi details. The Equalizer does not need a power supply to receive the data.
- Select the meter type.
- Connect the Equalizer with the special cable supplied.
- Press the blue arrow in the app to continue.
Once finished, the app will tell you it was successfully installed, and display the Site overview.
For installations with more than one circuit, we strongly recommend setting an upper limit fuse value for the entire charging infrastructure (eMobility fuse). To define this size, select the Equalizer in the site settings and enter the desired value under Max allocated current.