Automatic phase switching

Automatic phase switching

Automatic phase-switching by the product enables maximum utilization of self-generated solar power. This poses no danger to the electric vehicle’s on-board charger because there is a 120-second changeover pause between single- and three-phase charging –

in other words, active single-phase charging process is stopped and three-phase charging process is activated after a short wait. An integrated hysteresis prevents constant switching between the phases.

SMA phase-switching is like a manual interruption in the charging process and causes no vehicle damage when the equipment is properly installed and configured (relay switchover time).

From firmware version 2.7.X.R, the phase switching time between 15 and 120 seconds can be configured via the parameter "Minimum switching time relay" (Chrg.MinSwTm).

Short phase switching times may, under certain circumstances, lead to problems or damages to the AC on-board charger of the vehicle. When changing the parameter (below 120 s), coordinate the settings with the vehicle manufacturer.

Summer day: Optimal use of strong sunshine through initial single-phase operation, followed by three-phase operation at midday.

Use of self-generated PV energy even with low irradiation/few hours of sunshine thanks to single-phase operation.