stevek54 not 100% sure what you're asking.
It's not possible to export all generation whilst simultaneously running the house from batteries only. Solar will by default go to "load" (the property) first, then batteries, then grid. Depending on your inverter control, you may be able to stop/pause solar going to the batteries but, it would still cover the house load with the batteries only feeding the house if there's insufficient solar.
Most of us on IOG certainly do this. Charging you batteries to 100% overnight would also achieve this.
If your question was specifically to do with how to achieve this with Solax inverters, rather than a general thing, I'll have to defer to someone else.
