Products – EV Chargers - How does a 1-phase or 3-phase charger work?

1-phase

If there is a 1-phase connection in the meter cupboard, then you have a maximum of 35A or 40A. One meter of wire enters your meter. This connection is split into groups after the meter. Each group has a maximum number of A, which influences the maximum number of kWh. The number of kWh depends on the number A on the group.

For a 1-phase charger, a capacity of at least 16A is required. This means that you have 35A - 16A = 19A left for the other equipment in your home. A 1-phase charger at 16A produces 3.7kWh to charge the car

To make your meter cupboard suitable for a 1-phase charger, it is necessary to install a 1-phase earth leakage circuit breaker. Keep in mind that there must be enough space in the meter cupboard for this.

3-phase

With a 3-phase connection you usually have three times 25A. Three phase wires enter your meter. These connections are split into groups after the meter. Each group has a maximum number of A, which influences the maximum number of kWh. The number of kWh depends on the number A on the group.

For a 3-phase charger, a capacity of at least 16A is required. The charger is connected to all 3 phases. It is possible to search for the limit of 25A and to increase the charging speed. This is possible with dynamic load balancing. Find out more on our support page.

To make your meter cupboard suitable for a 3-phase charger, it is necessary to install a 3-phase system. In addition, it is necessary to have DC leak detection. This is possible with a Type B earth leakage circuit breaker. This switch also detects direct current in the event of a leak. This is not necessary for normal equipment, but it is for a charger for electric cars. In some situations, the DC leak detection is built into the charger. A type A earth circuit breaker is then enough. Keep in mind that there must be enough space in the meter cupboard for this.