NacNac In part you can already do this as long as your own daily usage pattern is fairly consistent.
If you fully charge you batteries during the cheap rate period, you then need to make a balanced judgement on your typical daily usage. This judgement will vary through the year and at present it is potentially more difficult as solar forecast from whichever source can, and will, vary significantly from reality.
In my case I'm not looking to game the system, I merely want to decrease the strain on the equipment if possible. but both end results will be achieved in a similar way.
I am currently experimenting with one timed charge session and two discharge sessions. What I Know is that my batteries will be at 100% at 07:00 and that at at 16:30 if I have 45% battery power left on a typical day I'm OK.
I also want to make sure that my maximum charge rate is during my maximum solar generation time to help to avoid trying to export when everybody else is exporting.
For arguments sake if I want to be able to charge at max from 13:00 to 15:00, I need my batteries to be at 40% maximum at 13:00. So that determines how I set the 1st discharge period.
The second discharge period is currently set to discharge down to 45% from 15:10 to 16:10 due to current low solar levels..
My thought is that as the solar gain improves I may need additional discharge slots, and even Charge power control to avoid Maximum charge rates. The one thing for certain is that I will need additional schedules so that I don't have to 'remember' what I've done this year. I would like it so I can save Autumn/Winter/Summer schedules.
