Hybrid system set up

[Grantplant]

Hi new to this so apologies if my question is a bit basic I have 2 growatt batteries that my solar panels charge. Once fully charged gives back to the grid. That is fine but in the UK we get much cheaper electric from the grid at night. Is there a way for the grid to charge the batteries over night so I am ready to start using the batteries say 6 am onwards? Guessing the issues is the inverter and the fact it wont take mains voltage back in to charge them, but would like to know as it could save me quite a bit of money.

any assistance greatly appreciated

[Ampster]

Google Growatt DIY and you may find some answers. There are a few posts here if you use the search function at the top of the page.