The feeders off the meter just need their own power meter and some smarts and a way to tell the car to pause charging (or just deenergize that circuit). The sma

The feeders off the meter just need their own power meter and some smarts and a way to tell the car to pause charging (or just deenergize that circuit). The smarts monitor the circuit that goes to the kitchen, sees that there's been a significant power draw for some amount of time, and then shuts off the car charging circuit. Pretty straightforwards circuit to build from scratch, though I'd recommend just getting a unit that does that.