6 Electrical Connection
SMA Solar Technology AG
Operating manual EVC22-3AC-20-BE-en-10 41
If communication between Sunny Home Manager and the charging stations fails, only single-phase
or three-phase charging vehicles can be charged. Two-phase charging vehicles are also limited to
single-phase charging in this case. You can set fallback values that take effect in the event of a
communication breakdown.
Number of active charging stations
Charging length
Charging current per line conductor (A)
Figure 10: 2-phase charging electric vehicle at SMA eCharger
In multi-EVC mode, the maximum charging current is limited to ensure overload protection
(maximum charging current/number of active charging stations). If, for example, 3 charging
stations are connected to a point of interconnection with a nominal current of 35A, the charging
current is limited as follows:
• 1 active charging station: 32A
• 2 active charging stations: 17.5 A per charging station
• 3 active charging stations: 11.67 A per charging station
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