If you have more than one Smappee charging station, it is beneficial to apply phase rotation during installation.
Not all cars use three phases to charge. For example, most plug-in hybrids currently only charge on one phase. Let's say you have 10 connectors (without phase rotation) and all of them are being used to charge a single-phase PHEV at 16A. This would mean that there is potentially a total current of 160A on phase 1, and no current on phase 2 and 3. Ideally, we want to balance this current over the three phases. To achieve this, phase rotation will need to be applied during installation.
An example of phase rotation can be seen below. Note that this is only an example and the actual order doesn't matter, as long as there is rotation.
EV Base
| Charging Station | Connector | Phase mapping |
| EV Base 1 | Connector 1 | L1 - L2 - L3 |
| Connector 2 | L2 – L3 – L1 | |
| EV Base 2 | Connector 1 | L3 – L1 – L2 |
| Connector 2 | L1 - L2 - L3 | |
| EV Base 3 | Connector 1 | L2 – L3 – L1 |
| Connector 2 | L3 – L1 – L2 |
EV Wall Business
| Charging Station | Connector | Phase mapping |
| EV Wall Business 1 | Connector 1 | L1 - L2 - L3 |
| EV Wall Business 2 | Connector 1 | L2 – L3 – L1 |
| EV Wall Business 3 | Connector 1 | L3 – L1 – L2 |
Physically, this means that for the first EV Wall Business, the L1 cable is connected to the L1 input of the charging station. For the second, the L1 cable is connected to the L3 input of the charging station. This is continued for all charging stations.
Note that this phase rotation must be registered using the Smappee dashboard. If this is not done, the overload protection will not work optimally. To register this in the dashboard, first select the charging station for which you want to change the settings. Next, using the 'Charging station configuration' card, scroll down to the Phase assignment settings. Press the pencil to edit the value and select the correct phase assignment from the drop-down menu.