Question about EcoFlow Micro Inverter 600W (CH)

When I feed in with the Powerstream without the Powerstation, I see the Wh input per day with solar panel in the app. But if I then look at the smart meter in the flat to see how much electricity was returned, I see a maximum of 50% of the upper value has been received. In the app, I have set the house power consumption to 600w connected to the smart plug, as it is not connected to the smart meter. But where is the remaining 50% of the electricity not arriving? There is already 1 smart plug connected but it doesn't consume that much electricity. So over the month, the returned electricity should be x5 if the solar power value is correct in the app.