It's cloudy and the hot water heater is turned off to save power. Suddenly, the clouds break, and the house's battery is confronted with more incoming amps than are safe to sustain. It's about to shut off half the solar panels to save itself. But then the hot water heater dives in and takes the power. The car's battery is low, and the hot water heater has a good amount of hot water, but could still heat more. It runs for a while but sees the house battery is depleting under both loads, and won't meet the hourly target. So it shuts off to maximise the car and house battery charges. Or vice-versa, the hot water heater is running low and the car stops charging. A few scenarios I automated today.. Mostly using less code than it takes to describe them here.