For my situation, my tesla battery will be fully charged within about 2hours if it is sunny days. And Ausgrid charges extra between 10-3pm if exceeds certain amount of power. So the logic best working for me is to let Tesla invertor stop charging battery before 10am if it is sunny/cloudy days. I got both Tesla Powerwall and Tesla custom integration installed. And amber electric integration installed. However, I can’t find way to let Tesla invertor stop charging battery and send exccess solar power to grid instead. I can see Amber smartshift has battery control button to do so. And when I was on Tesla VPP, I do see this action happens when Tesla VPP took control. There was an article talking about set export mode to everything and in tesla app, put feedin price very high. to force tesla send exccess power to grid. However, it doesn’t work with I am with Amber.