I have to say that is quite a drain on the power wall. How long is your peak time per day? Here it is 5-9pm and my power wall prioritizes that time. Solar actually pushes to the grid for primo return on power production. My pool pump is usually turning off then or at least the variable speed is...
Any update from your electrician?
I'm supposed to be getting a FCSP in the mail in the next few days, and I was considering selling it and getting a tesla universal charger.