Discharging to the grid with Growatt Inverter

Configuration
1

Hi I have an Growatt Inverter SPH3000-6000 and I would like to set it as this:

First period. Discharge to the grid between 16:30pm and 19:00pm until the remaining load in the battery reaches 50%
Second period. Discharge to the grid between 23:30pm and 00:29pm until the remaining load in the battery reaches 10%

How can this be done?

Thanks