Phase rotation

Connecting charge points in turns, starting on L1, L2 or L3, so single-phase cars spread evenly over the three phases.

Explained in

Load management · Stop 05Why do the three phases matter?Three-phase and single-phase cars, unbalanced load and phase rotation: why load management has to count per phase, not only in total.

Phase rotation. Charge points are connected in turns: the first with L1 first, the next with L2 first, the next with L3 first. Single-phase cars then spread over the three phases. OCPP lets a charger report this wiring order for each connector.

From “Two remedies”, stop 05
  1. OCPPOpen Charge Point Protocol: the open protocol between a charger and its operator's backend.
  1. Open Charge Alliance: OCPP 1.6 edition 2 (2017), section 2 Terminology (phase rotation), section 7.12 ChargingRateUnitType (amperes per phase, 230 V) and the ConnectorPhaseRotation key; free download. https://openchargealliance.org/download-ocpp/. Checked 13 Oct 2026.