That will prevent the Solis from supplying batter power to your EV or house load during that time. Or an alternative would be to remove the discharge completely and set the charge time of the Solis for the whole cheap period and reduce the charge current accordingly.
Enter the maximum time in hours and minutes (hh:mm) the solar charger is allowed to spend in the absorption stage. The maximum time that can be set is 12 hours and 59 minutes. Float voltage This setting sets the float voltage. Re-bulk voltage offset This setting sets the re-bulk voltage offset.
If the energy stored in batteries is low and power from solar is low too, the inverter will go in bypass mode. The grid will charge the batteries Prog.01 at SBU. When the battery voltage is less than the setting of Prog.12 then switch to Line mode. The charger source is defined in Prog.16.
When the batteries are low the grid will “see” the inverter as any other appliance in the house or as a charger that demands power. For that reason this set up is free from complicated contracts with the electricity suppliers. If the energy stored in batteries is low and power from solar is low too, the inverter will go in bypass mode.
I would certainly expect it to keep the solar enabled, you are effectively running as an off-grid system so you would expect it to cover the house load and if any surplus charge the batteries, likewise if there wasn't enough solar the batteries would support the PV to cover the house loads.
If you want less than 1000w taken from the grid, you need to change your time of use settings / add more panels / add more batteries / reduce the load. It depends Inverter is consuming +/- 50w, taken from the grid as long as grid is present.