How to charge a home battery from the grid in low cost period

Dear all,
I just installed a Home Assistant with some support from a family member
I added already the following apps

  • (Belgian) digital meter trough Smart Gateway
  • Solis Solar Power converter with Home Battery
  • Mercedes Me app

I want to charge my home battery from the grid (now that there is almost no sun during dayhours) during the low price night hours
How can I do this in Home Assistant?
The goal is to consume that energy during peak hours
I am a very beginner in Home assistant and lucky that I found this forum.

many thanks for helping me
Fox30