Where I live, there is the option of having water heated using off-peak electricity overnight, where the exact timing is determined by the distributor. For some reason, the distributor today decided to operate my offpeak water heating after 7am. This resulted in my powerwall discharging to supply some of the current required for heating, and then recharging itself from mid-priced electricity. This is less than optimal. Given the configuration (current advanced, cost saving), I can understand why the system discharged to supply the power for the heating, though not why it would then recharge itself from the grid. Either way, it's not a sensible strategy. Unfortunately, the system has no way of distinguishing between controlled load power, and other power. I think I'll have to get my installer to change the position of the current transformer so that the controlled load current is excluded. Something that others might want to consider.