What is the meaning of output power in the inverter?

Since last summer, we have had a photovoltaic system with 6.12 kWp and the Fronius Symo Hybrid inverter. Until now, the inverter always displayed what was currently being produced on the roof. Now we have a battery storage with 5.1 kWh. Now the inverter shows something under "output power" in W, which I cannot classify. What is behind this output power?

Output power is the current power coming from the roof.

Do you have a hard or soft curtailment? The photovoltaic system may feed a maximum of 70% into the power grid.
So with 6.12 kWp, it is 4.284 kWh. With hard curtailment, the photovoltaic system will not produce more than that.
If there is an intermediate meter that takes self-consumption into account, the system can produce 6.12 if the self-consumption is above 30% of the system power.

Do you have a hard or soft curtailment?

For storage, I think only soft is possible.

So at 6.12 kWp it is 4.284 kWh.

kWh -> kW

The best way to see all this is in the portal. The question is what is happening at that moment, is the WR charging the battery, is power being drawn, or is it feeding into the grid. Photos would be simple (we don't have a battery)