Charging power wrong: Smart ED3 Fortwo 3.7 kW

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I selected my car model "Smart ED3 Fortwo 3.7 kW" and the route planning says roughly 20 minutes for 5 kWh charging. But my charger is only 3.7 kWh. So it should take around 1h 20m to charge 5 kWh. Way longer.

I do not see any setting where I could override this.