Optimum export from NetZero apo

I’ve been using the NetZero app for a few months now to get a feel for what’s achievable. I have 2xPowerwall 3s and 19 panels and an EV. I am on Octopus’ Agile tariffs. My aim is to programme Home Assistant in time. I’m just setting all that up.

However, has anyone optimally set NZ up for importing cheap power or solar to fill the battery and exporting excess and at peak sale price to maintain a minimum battery level to see you through the night? Rinse and repeat.
Default settings definitely aren’t good enough, and with automations I can’t get it to export at peak price times.

When I do go to HA I assume the hard bit will be Tesla control of some sort. But I’m determined to optimise. Have connected AI to HA to help me when ready!

All advice hugely appreciated!!