germanfag here
most more modern homes have an electric stove/oven that runs on 400V
the biggest I have seen are rated for 7.5kW.

My kitchen has 4 circuits for regular appliances, each can handle 16A at 230V which is a little above 3kW each
>one just for the microwave
>one just for the dishwasher
>two circuits are just regular outlets above the countertop for stuff like mixers etc.
>on one of these is also the fridge
>then the 400V 3 phase circuit for the stove/oven (3x25A)