Is Enabled Power control working incorrectly?

[Vaszago]

Either I misunderstand the function of Enabled Power Control or the function is faulty. According to the wiki, when the active power is set to zero and

there is a surplus of PV power, the batteries should be charged. But at the moment the surplus goes into the grid and not into the batteries. Are my settings wrong or is the function not working as intended.

Or it doesn't work because my PV comes from a third-party inverter. But if I enter a value in the active power controller, the battery is charged.